[{"publisher":"Institute of Science and Technology Austria","publication_status":"published","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","page":"109","file_date_updated":"2025-10-11T22:30:02Z","oa":1,"OA_place":"publisher","type":"dissertation","year":"2025","corr_author":"1","department":[{"_id":"GradSch"},{"_id":"JoFi"}],"project":[{"call_identifier":"H2020","name":"Quantum readout techniques and technologies","grant_number":"862644","_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E"},{"name":"QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration of Superconducting Quantum Circuits","grant_number":"F07105","_id":"bdb108fd-d553-11ed-ba76-83dc74a9864f"}],"author":[{"full_name":"Sett, Riya","id":"2E6D040E-F248-11E8-B48F-1D18A9856A87","first_name":"Riya","orcid":"0000-0001-7641-8348","last_name":"Sett"}],"date_published":"2025-04-01T00:00:00Z","file":[{"date_created":"2025-04-10T11:33:22Z","file_size":4129208,"file_id":"19538","date_updated":"2025-10-11T22:30:02Z","checksum":"ba6cd2289d0141a160a14fc97df1632f","relation":"main_file","creator":"rsett","file_name":"PhD_Thesis_Riya_Sett_pdfa.pdf","embargo":"2025-10-11","content_type":"application/pdf","access_level":"open_access"},{"date_updated":"2025-10-11T22:30:02Z","file_id":"19539","date_created":"2025-04-10T11:34:08Z","file_size":6646110,"access_level":"closed","content_type":"application/x-zip-compressed","embargo_to":"open_access","file_name":"PhD Thesis Riya Sett.zip","creator":"rsett","checksum":"ee63a94cb8f7adf5e766903028b81ed6","relation":"source_file"}],"_id":"19533","ec_funded":1,"title":"Quantum remote sensing and non-equilibrium phase transitions in the microwave regime","date_created":"2025-04-09T16:44:26Z","date_updated":"2026-10-15T09:08:00Z","month":"04","article_processing_charge":"No","keyword":["phase transition","open quantum system","phase diagram","cavity quantum electrodynamics","superconducting qubits","semiclassical physics","quantum optics","josephson junction","parametric converter","phase conjugation","quantum radar","quantum entanglement","correlation","quantum sensing"],"oa_version":"Published Version","day":"1","supervisor":[{"first_name":"Johannes M","last_name":"Fink","orcid":"0000-0001-8112-028X","full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87"}],"citation":{"ista":"Sett R. 2025. Quantum remote sensing and non-equilibrium phase transitions in the microwave regime. Institute of Science and Technology Austria.","apa":"Sett, R. (2025). <i>Quantum remote sensing and non-equilibrium phase transitions in the microwave regime</i>. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT-ISTA-19533\">https://doi.org/10.15479/AT-ISTA-19533</a>","short":"R. Sett, Quantum Remote Sensing and Non-Equilibrium Phase Transitions in the Microwave Regime, Institute of Science and Technology Austria, 2025.","ama":"Sett R. Quantum remote sensing and non-equilibrium phase transitions in the microwave regime. 2025. doi:<a href=\"https://doi.org/10.15479/AT-ISTA-19533\">10.15479/AT-ISTA-19533</a>","chicago":"Sett, Riya. “Quantum Remote Sensing and Non-Equilibrium Phase Transitions in the Microwave Regime.” Institute of Science and Technology Austria, 2025. <a href=\"https://doi.org/10.15479/AT-ISTA-19533\">https://doi.org/10.15479/AT-ISTA-19533</a>.","ieee":"R. Sett, “Quantum remote sensing and non-equilibrium phase transitions in the microwave regime,” Institute of Science and Technology Austria, 2025.","mla":"Sett, Riya. <i>Quantum Remote Sensing and Non-Equilibrium Phase Transitions in the Microwave Regime</i>. Institute of Science and Technology Austria, 2025, doi:<a href=\"https://doi.org/10.15479/AT-ISTA-19533\">10.15479/AT-ISTA-19533</a>."},"degree_awarded":"PhD","doi_confirm":"1","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"has_accepted_license":"1","status":"public","publication_identifier":{"issn":["2663-337X"]},"doi":"10.15479/AT-ISTA-19533","abstract":[{"lang":"eng","text":"This thesis explores advancements in quantum remote sensing and non-equilibrium phase\r\ntransitions in the microwave regime, with a focus on dissipative phase transitions and quantumenhanced sensing.\r\nIn the first project, I experimentally studied photon blockade breakdown as a dissipative phase\r\ntransition in a zero-dimensional cavity-qubit system. By defining an appropriate thermodynamic\r\nlimit, we demonstrated that the observed bistability is a genuine signature of a first-order\r\nphase transition in this system. This work provides insight into non-equilibrium quantum\r\ndynamics and phase transitions in driven-dissipative open quantum systems.\r\nThe second project focuses on the experimental realization of a phase-conjugate receiver for\r\nquantum illumination (QI), a quantum sensing protocol that enhances target detection in noisy\r\nenvironments using entangled light. While an ideal spontaneous parametric down-conversion\r\n(SPDC) source and receiver could, in theory, provide up to a 6 dB advantage over classical\r\nillumination, no such ideal receiver exists. Instead, we explore an experimental realization of a\r\nphase-conjugate receiver for QI in the microwave regime at millikelvin temperatures using a\r\nJosephson parametric converter (JPC) as a source of continuous-variable Gaussian entangled\r\nsignal-idler pairs, where a maximum 3 dB advantage is theoretically achievable. We investigate\r\nkey experimental limitations that constrain practical QI performance, contributing to the\r\ndevelopment of quantum-enhanced sensing.\r\nAdditionally, this thesis presents efficient digital signal processing (DSP) techniques implemented in C++ and Python in collaboration with Przemysław Zieliński and Luka Drmić. These\r\nmethods, optimized using the Intel Integrated Performance Primitives (IPP) library, have been\r\nessential in data acquisition, noise filtering, and correlation analysis across multiple research\r\nprojects. Although not real-time, these DSP techniques significantly enhance the accuracy of\r\nquantum measurements.\r\nOverall, this thesis advances quantum-enhanced sensing by establishing the thermodynamic\r\nlimit in a single transmon-cavity system and experimentally exploring a phase-conjugate receiver\r\nfor QI. These findings contribute to quantum metrology, particularly for weak signal detection\r\nand remote sensing in noisy environments.\r\n"}],"language":[{"iso":"eng"}],"acknowledgement":"I acknowledge the generous financial support of the Austrian Science Fund (FWF) via BeyondC\r\n(F7105) and the European Union’s Horizon 2020 research and innovation program (FETopen\r\nQUARTET, Grant Agreement No. 862644), which made this research possible. I also extend\r\nmy sincere appreciation to the MIBA workshop and the Institute of Science and Technology\r\nAustria nanofabrication facility for their technical assistance, which was instrumental in realizing\r\nthis work.","fulldoi":"https://doi.org/10.15479/AT-ISTA-19533","alternative_title":["ISTA Thesis"],"related_material":{"record":[{"relation":"research_data","id":"18978","status":"public"},{"status":"public","id":"19280","relation":"part_of_dissertation"},{"id":"13117","relation":"part_of_dissertation","status":"public"},{"status":"public","relation":"part_of_dissertation","id":"17183"}]},"acknowledged_ssus":[{"_id":"ScienComp"},{"_id":"M-Shop"},{"_id":"NanoFab"},{"_id":"LifeSc"},{"_id":"SSU"}],"ddc":["530"]},{"project":[{"name":"Quantum readout techniques and technologies","call_identifier":"H2020","grant_number":"862644","_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E"},{"_id":"3AC91DDA-15DF-11EA-824D-93A3E7B544D1","name":"FWF Open Access Fund","call_identifier":"FWF"},{"_id":"bdb108fd-d553-11ed-ba76-83dc74a9864f","grant_number":"F07105","name":"QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration of Superconducting Quantum Circuits"}],"OA_type":"gold","department":[{"_id":"JoFi"},{"_id":"AnHi"}],"corr_author":"1","type":"journal_article","scopus_import":"1","year":"2024","file_date_updated":"2024-06-28T12:04:43Z","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","publication_status":"published","publisher":"American Physical Society","OA_place":"publisher","oa":1,"article_number":"010327","quality_controlled":"1","date_created":"2024-06-27T10:58:06Z","arxiv":1,"title":"Emergent macroscopic bistability induced by a single superconducting qubit","article_type":"original","article_processing_charge":"Yes","date_updated":"2026-11-07T23:31:07Z","researchdata_availability":"yes","month":"02","APC_amount":"3782,54","file":[{"date_created":"2024-06-28T12:04:43Z","file_size":1443351,"success":1,"file_id":"17185","date_updated":"2024-06-28T12:04:43Z","checksum":"0833880d47f74ad1deda93a1d8ffa5a7","relation":"main_file","file_name":"2024_PRXQuantum_Sett.pdf","creator":"cchlebak","content_type":"application/pdf","access_level":"open_access"}],"publication":"PRX Quantum","date_published":"2024-02-16T00:00:00Z","author":[{"id":"2E6D040E-F248-11E8-B48F-1D18A9856A87","full_name":"Sett, Riya","orcid":"0000-0001-7641-8348","last_name":"Sett","first_name":"Riya"},{"first_name":"Farid","last_name":"Hassani","orcid":"0000-0001-6937-5773","full_name":"Hassani, Farid","id":"2AED110C-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Duc T","last_name":"Phan","full_name":"Phan, Duc T","id":"29C8C0B4-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Barzanjeh, Shabir","id":"2D25E1F6-F248-11E8-B48F-1D18A9856A87","first_name":"Shabir","last_name":"Barzanjeh","orcid":"0000-0003-0415-1423"},{"full_name":"Vukics, Andras","last_name":"Vukics","first_name":"Andras"},{"last_name":"Fink","orcid":"0000-0001-8112-028X","first_name":"Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M"}],"ec_funded":1,"_id":"17183","supplementarymaterial":"yes","status":"public","has_accepted_license":"1","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"day":"16","DOAJ_listed":"1","oa_version":"Published Version","external_id":{"isi":["001171652500001"],"arxiv":["2210.14182"]},"issue":"1","citation":{"ieee":"R. Sett, F. Hassani, D. T. Phan, S. Barzanjeh, A. Vukics, and J. M. Fink, “Emergent macroscopic bistability induced by a single superconducting qubit,” <i>PRX Quantum</i>, vol. 5, no. 1. American Physical Society, 2024.","ama":"Sett R, Hassani F, Phan DT, Barzanjeh S, Vukics A, Fink JM. Emergent macroscopic bistability induced by a single superconducting qubit. <i>PRX Quantum</i>. 2024;5(1). doi:<a href=\"https://doi.org/10.1103/prxquantum.5.010327\">10.1103/prxquantum.5.010327</a>","short":"R. Sett, F. Hassani, D.T. Phan, S. Barzanjeh, A. Vukics, J.M. Fink, PRX Quantum 5 (2024).","chicago":"Sett, Riya, Farid Hassani, Duc T Phan, Shabir Barzanjeh, Andras Vukics, and Johannes M Fink. “Emergent Macroscopic Bistability Induced by a Single Superconducting Qubit.” <i>PRX Quantum</i>. American Physical Society, 2024. <a href=\"https://doi.org/10.1103/prxquantum.5.010327\">https://doi.org/10.1103/prxquantum.5.010327</a>.","mla":"Sett, Riya, et al. “Emergent Macroscopic Bistability Induced by a Single Superconducting Qubit.” <i>PRX Quantum</i>, vol. 5, no. 1, 010327, American Physical Society, 2024, doi:<a href=\"https://doi.org/10.1103/prxquantum.5.010327\">10.1103/prxquantum.5.010327</a>.","ista":"Sett R, Hassani F, Phan DT, Barzanjeh S, Vukics A, Fink JM. 2024. Emergent macroscopic bistability induced by a single superconducting qubit. PRX Quantum. 5(1), 010327.","apa":"Sett, R., Hassani, F., Phan, D. T., Barzanjeh, S., Vukics, A., &#38; Fink, J. M. (2024). Emergent macroscopic bistability induced by a single superconducting qubit. <i>PRX Quantum</i>. American Physical Society. <a href=\"https://doi.org/10.1103/prxquantum.5.010327\">https://doi.org/10.1103/prxquantum.5.010327</a>"},"related_material":{"record":[{"relation":"research_data","id":"18978","status":"public"},{"id":"19533","relation":"dissertation_contains","status":"public"}]},"fulldoi":"https://doi.org/10.1103/prxquantum.5.010327","acknowledgement":"This work has received funding from the Austrian Science Fund (FWF) through BeyondC (F7105) and the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 862644 (FETopen QUARTET). A.V. acknowledges support from the National Research, Development and Innovation Office of Hungary (NKFIH) within the Quantum Information National Laboratory of Hungary. The authors thank the MIBA workshop and the Institute of Science and Technology Austria nanofabrication facility for technical support. We are grateful to HUN-REN Cloud for providing us with suitable computational infrastructure for the simulations.","intvolume":"         5","das_tickbox":"0","volume":5,"acknowledged_ssus":[{"_id":"M-Shop"}],"ddc":["530"],"doi":"10.1103/prxquantum.5.010327","publication_identifier":{"eissn":["2691-3399"]},"language":[{"iso":"eng"}],"abstract":[{"text":"The photon blockade breakdown in a continuously driven cavity QED system has been proposed as a prime example for a first-order driven-dissipative quantum phase transition. However, the predicted scaling from a microscopic behavior—dominated by quantum fluctuations—to a macroscopic one—characterized by stable phases—and the associated exponents and phase diagram have not been observed so far. In this work we couple a single transmon qubit with a fixed coupling strength 𝑔 to a superconducting cavity that is in situ bandwidth 𝜅 tunable to controllably approach this thermodynamic limit. Even though the system remains microscopic, we observe its behavior becoming increasingly macroscopic as a function of 𝑔/𝜅. For the highest realized 𝑔/𝜅 of approximately 287, the system switches with a characteristic timescale as long as 6 s between a bright coherent state with approximately 8×103 intracavity photons and the vacuum state. This exceeds the microscopic timescales by 6 orders of magnitude and approaches the perfect hysteresis expected between two macroscopic attractors in the thermodynamic limit. These findings and interpretation are qualitatively supported by neoclassical theory and large-scale quantum-jump Monte Carlo simulations. Besides shedding more light on driven-dissipative physics in the limit of strong light-matter coupling, this system might also find applications in quantum sensing and metrology.","lang":"eng"}],"isi":1},{"date_created":"2023-05-31T11:39:24Z","arxiv":1,"title":"Entangling microwaves with light","article_type":"original","article_processing_charge":"No","month":"05","date_updated":"2026-04-15T06:39:33Z","publication":"Science","date_published":"2023-05-18T00:00:00Z","author":[{"last_name":"Sahu","orcid":"0000-0001-6264-2162","first_name":"Rishabh","id":"47D26E34-F248-11E8-B48F-1D18A9856A87","full_name":"Sahu, Rishabh"},{"full_name":"Qiu, Liu","id":"45e99c0d-1eb1-11eb-9b96-ed8ab2983cac","first_name":"Liu","last_name":"Qiu","orcid":"0000-0003-4345-4267"},{"first_name":"William J","orcid":"0000-0001-9868-2166","last_name":"Hease","full_name":"Hease, William J","id":"29705398-F248-11E8-B48F-1D18A9856A87"},{"orcid":"0000-0003-1397-7876","last_name":"Arnold","first_name":"Georg M","id":"3770C838-F248-11E8-B48F-1D18A9856A87","full_name":"Arnold, Georg M"},{"last_name":"Minoguchi","first_name":"Y.","full_name":"Minoguchi, Y."},{"last_name":"Rabl","first_name":"P.","full_name":"Rabl, P."},{"last_name":"Fink","orcid":"0000-0001-8112-028X","first_name":"Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M"}],"ec_funded":1,"_id":"13106","pmid":1,"project":[{"grant_number":"758053","_id":"26336814-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"A Fiber Optic Transceiver for Superconducting Qubits"},{"grant_number":"899354","_id":"9B868D20-BA93-11EA-9121-9846C619BF3A","name":"Quantum Local Area Networks with Superconducting Qubits","call_identifier":"H2020"},{"call_identifier":"H2020","name":"ISTplus - Postdoctoral Fellowships","grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425"},{"name":"Quantum readout techniques and technologies","call_identifier":"H2020","grant_number":"862644","_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E"},{"name":"Coherent on-chip conversion of superconducting qubit signals from microwaves to optical frequencies","_id":"2671EB66-B435-11E9-9278-68D0E5697425"},{"name":"QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration of Superconducting Quantum Circuits","_id":"bdb108fd-d553-11ed-ba76-83dc74a9864f","grant_number":"F07105"}],"department":[{"_id":"JoFi"}],"corr_author":"1","year":"2023","type":"journal_article","scopus_import":"1","page":"718-721","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_status":"published","publisher":"American Association for the Advancement of Science","quality_controlled":"1","oa":1,"related_material":{"link":[{"url":"https://ista.ac.at/en/news/wiring-up-quantum-circuits-with-light/","description":"News on ISTA Website","relation":"press_release"}],"record":[{"status":"public","relation":"research_data","id":"13122"}]},"fulldoi":"https://doi.org/10.1126/science.adg3812","intvolume":"       380","acknowledgement":"This work was supported by the European Research Council (grant no. 758053, ERC StG QUNNECT) and the European Union’s Horizon 2020 Research and Innovation Program (grant no. 899354, FETopen SuperQuLAN). L.Q. acknowledges generous support from the ISTFELLOW program. W.H. is the recipient of an ISTplus postdoctoral fellowship with funding from the European Union’s Horizon 2020 Research and Innovation Program (Marie Sklodowska-Curie grant no. 754411). G.A. is the recipient of a DOC fellowship of the Austrian Academy of Sciences at IST Austria. J.M.F. acknowledges support from the Austrian Science Fund (FWF) through BeyondC (grant no. F7105) and the European Union’s Horizon 2020 Research and Innovation Program (grant no. 862644, FETopen QUARTET).","volume":380,"doi":"10.1126/science.adg3812","publication_identifier":{"eissn":["1095-9203"],"issn":["0036-8075"]},"language":[{"iso":"eng"}],"abstract":[{"text":"Quantum entanglement is a key resource in currently developed quantum technologies. Sharing this fragile property between superconducting microwave circuits and optical or atomic systems would enable new functionalities, but this has been hindered by an energy scale mismatch of >104 and the resulting mutually imposed loss and noise. In this work, we created and verified entanglement between microwave and optical fields in a millikelvin environment. Using an optically pulsed superconducting electro-optical device, we show entanglement between propagating microwave and optical fields in the continuous variable domain. This achievement not only paves the way for entanglement between superconducting circuits and telecom wavelength light, but also has wide-ranging implications for hybrid quantum networks in the context of modularization, scaling, sensing, and cross-platform verification.","lang":"eng"}],"isi":1,"status":"public","day":"18","main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2301.03315"}],"oa_version":"Preprint","keyword":["Multidisciplinary"],"external_id":{"arxiv":["2301.03315"],"pmid":["37200415"],"isi":["000996515200004"]},"issue":"6646","citation":{"ieee":"R. Sahu <i>et al.</i>, “Entangling microwaves with light,” <i>Science</i>, vol. 380, no. 6646. American Association for the Advancement of Science, pp. 718–721, 2023.","short":"R. Sahu, L. Qiu, W.J. Hease, G.M. Arnold, Y. Minoguchi, P. Rabl, J.M. Fink, Science 380 (2023) 718–721.","chicago":"Sahu, Rishabh, Liu Qiu, William J Hease, Georg M Arnold, Y. Minoguchi, P. Rabl, and Johannes M Fink. “Entangling Microwaves with Light.” <i>Science</i>. American Association for the Advancement of Science, 2023. <a href=\"https://doi.org/10.1126/science.adg3812\">https://doi.org/10.1126/science.adg3812</a>.","ama":"Sahu R, Qiu L, Hease WJ, et al. Entangling microwaves with light. <i>Science</i>. 2023;380(6646):718-721. doi:<a href=\"https://doi.org/10.1126/science.adg3812\">10.1126/science.adg3812</a>","mla":"Sahu, Rishabh, et al. “Entangling Microwaves with Light.” <i>Science</i>, vol. 380, no. 6646, American Association for the Advancement of Science, 2023, pp. 718–21, doi:<a href=\"https://doi.org/10.1126/science.adg3812\">10.1126/science.adg3812</a>.","ista":"Sahu R, Qiu L, Hease WJ, Arnold GM, Minoguchi Y, Rabl P, Fink JM. 2023. Entangling microwaves with light. Science. 380(6646), 718–721.","apa":"Sahu, R., Qiu, L., Hease, W. J., Arnold, G. M., Minoguchi, Y., Rabl, P., &#38; Fink, J. M. (2023). Entangling microwaves with light. <i>Science</i>. American Association for the Advancement of Science. <a href=\"https://doi.org/10.1126/science.adg3812\">https://doi.org/10.1126/science.adg3812</a>"}},{"language":[{"iso":"eng"}],"abstract":[{"text":"Recent substantial advances in the feld of superconducting circuits have shown its\r\npotential as a leading platform for future quantum computing. In contrast to classical\r\ncomputers based on bits that are represented by a single binary value, 0 or 1, quantum\r\nbits (or qubits) can be in a superposition of both. Thus, quantum computers can store\r\nand handle more information at the same time and a quantum advantage has already\r\nbeen demonstrated for two types of computational tasks. Rapid progress in academic\r\nand industry labs accelerates the development of superconducting processors which may\r\nsoon fnd applications in complex computations, chemical simulations, cryptography, and\r\noptimization. Now that these machines are scaled up to tackle such problems the questions\r\nof qubit interconnects and networks becomes very relevant. How to route signals on-chip\r\nbetween diferent processor components? What is the most efcient way to entangle\r\nqubits? And how to then send and process entangled signals between distant cryostats\r\nhosting superconducting processors?\r\nIn this thesis, we are looking for solutions to these problems by studying the collective\r\nbehavior of superconducting qubit ensembles. We frst demonstrate on-demand tunable\r\ndirectional scattering of microwave photons from a pair of qubits in a waveguide. Such a\r\ndevice can route microwave photons on-chip with a high diode efciency. Then we focus\r\non studying ultra-strong coupling regimes between light (microwave photons) and matter\r\n(superconducting qubits), a regime that could be promising for extremely fast multi-qubit\r\nentanglement generation. Finally, we show coherent pulse storage and periodic revivals\r\nin a fve qubit ensemble strongly coupled to a resonator. Such a reconfgurable storage\r\ndevice could be used as part of a quantum repeater that is needed for longer-distance\r\nquantum communication.\r\nThe achieved high degree of control over multi-qubit ensembles highlights not only the\r\nbeautiful physics of circuit quantum electrodynamics, it also represents the frst step\r\ntoward new quantum simulation and communication methods, and certain techniques\r\nmay also fnd applications in future superconducting quantum computing hardware.\r\n","lang":"eng"}],"doi":"10.15479/at:ista:12132","publication_identifier":{"issn":["2663-337X"],"isbn":["978-3-99078-024-4"]},"acknowledged_ssus":[{"_id":"NanoFab"},{"_id":"M-Shop"},{"_id":"EM-Fac"}],"ddc":["530"],"alternative_title":["ISTA Thesis"],"fulldoi":"https://doi.org/10.15479/at:ista:12132","citation":{"chicago":"Redchenko, Elena. “Controllable States of Superconducting Qubit Ensembles.” Institute of Science and Technology Austria, 2022. <a href=\"https://doi.org/10.15479/at:ista:12132\">https://doi.org/10.15479/at:ista:12132</a>.","ama":"Redchenko E. Controllable states of superconducting Qubit ensembles. 2022. doi:<a href=\"https://doi.org/10.15479/at:ista:12132\">10.15479/at:ista:12132</a>","short":"E. Redchenko, Controllable States of Superconducting Qubit Ensembles, Institute of Science and Technology Austria, 2022.","ieee":"E. Redchenko, “Controllable states of superconducting Qubit ensembles,” Institute of Science and Technology Austria, 2022.","mla":"Redchenko, Elena. <i>Controllable States of Superconducting Qubit Ensembles</i>. Institute of Science and Technology Austria, 2022, doi:<a href=\"https://doi.org/10.15479/at:ista:12132\">10.15479/at:ista:12132</a>.","ista":"Redchenko E. 2022. Controllable states of superconducting Qubit ensembles. Institute of Science and Technology Austria.","apa":"Redchenko, E. (2022). <i>Controllable states of superconducting Qubit ensembles</i>. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/at:ista:12132\">https://doi.org/10.15479/at:ista:12132</a>"},"supervisor":[{"full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","first_name":"Johannes M","last_name":"Fink","orcid":"0000-0001-8112-028X"}],"day":"26","oa_version":"Published Version","has_accepted_license":"1","status":"public","degree_awarded":"PhD","_id":"12366","ec_funded":1,"file":[{"date_created":"2023-01-25T09:41:49Z","file_size":56076868,"date_updated":"2023-01-26T23:30:44Z","file_id":"12367","file_name":"Final_Thesis_ES_Redchenko.pdf","creator":"cchlebak","embargo":"2022-12-28","relation":"main_file","checksum":"39eabb1e006b41335f17f3b29af09648","access_level":"open_access","content_type":"application/pdf"}],"author":[{"last_name":"Redchenko","first_name":"Elena","id":"2C21D6E8-F248-11E8-B48F-1D18A9856A87","full_name":"Redchenko, Elena"}],"date_published":"2022-09-26T00:00:00Z","article_processing_charge":"No","date_updated":"2026-04-07T14:22:39Z","month":"09","date_created":"2023-01-25T09:17:02Z","title":"Controllable states of superconducting Qubit ensembles","oa":1,"OA_place":"publisher","user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","page":"168","file_date_updated":"2023-01-26T23:30:44Z","publisher":"Institute of Science and Technology Austria","publication_status":"published","department":[{"_id":"GradSch"},{"_id":"JoFi"}],"project":[{"_id":"2564DBCA-B435-11E9-9278-68D0E5697425","grant_number":"665385","call_identifier":"H2020","name":"International IST Doctoral Program"},{"name":"A Fiber Optic Transceiver for Superconducting Qubits","call_identifier":"H2020","_id":"26336814-B435-11E9-9278-68D0E5697425","grant_number":"758053"},{"name":"Quantum readout techniques and technologies","call_identifier":"H2020","grant_number":"862644","_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E"}],"type":"dissertation","year":"2022","corr_author":"1"},{"pmid":1,"project":[{"call_identifier":"H2020","name":"A Fiber Optic Transceiver for Superconducting Qubits","grant_number":"758053","_id":"26336814-B435-11E9-9278-68D0E5697425"},{"_id":"9B868D20-BA93-11EA-9121-9846C619BF3A","grant_number":"899354","name":"Quantum Local Area Networks with Superconducting Qubits","call_identifier":"H2020"},{"call_identifier":"H2020","name":"ISTplus - Postdoctoral Fellowships","grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425"},{"_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E","grant_number":"862644","name":"Quantum readout techniques and technologies","call_identifier":"H2020"},{"grant_number":"F07105","_id":"bdb108fd-d553-11ed-ba76-83dc74a9864f","name":"QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration of Superconducting Quantum Circuits"}],"department":[{"_id":"JoFi"}],"corr_author":"1","scopus_import":"1","type":"journal_article","year":"2022","file_date_updated":"2022-03-28T08:02:12Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_status":"published","publisher":"Springer Nature","oa":1,"quality_controlled":"1","article_number":"1276","date_created":"2022-03-27T22:01:45Z","arxiv":1,"title":"Quantum-enabled operation of a microwave-optical interface","article_type":"original","article_processing_charge":"No","month":"03","date_updated":"2026-11-07T23:30:29Z","file":[{"date_updated":"2022-03-28T08:02:12Z","file_id":"10929","success":1,"date_created":"2022-03-28T08:02:12Z","file_size":1167492,"access_level":"open_access","content_type":"application/pdf","creator":"dernst","file_name":"2022_NatureCommunications_Sahu.pdf","relation":"main_file","checksum":"7c5176db7b8e2ed18a4e0c5aca70a72c"}],"publication":"Nature Communications","date_published":"2022-03-11T00:00:00Z","author":[{"last_name":"Sahu","orcid":"0000-0001-6264-2162","first_name":"Rishabh","id":"47D26E34-F248-11E8-B48F-1D18A9856A87","full_name":"Sahu, Rishabh"},{"first_name":"William J","orcid":"0000-0001-9868-2166","last_name":"Hease","full_name":"Hease, William J","id":"29705398-F248-11E8-B48F-1D18A9856A87"},{"full_name":"Rueda Sanchez, Alfredo R","id":"3B82B0F8-F248-11E8-B48F-1D18A9856A87","first_name":"Alfredo R","last_name":"Rueda Sanchez","orcid":"0000-0001-6249-5860"},{"first_name":"Georg M","last_name":"Arnold","orcid":"0000-0003-1397-7876","full_name":"Arnold, Georg M","id":"3770C838-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Liu","orcid":"0000-0003-4345-4267","last_name":"Qiu","full_name":"Qiu, Liu","id":"45e99c0d-1eb1-11eb-9b96-ed8ab2983cac"},{"orcid":"0000-0001-8112-028X","last_name":"Fink","first_name":"Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M"}],"ec_funded":1,"_id":"10924","has_accepted_license":"1","status":"public","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"day":"11","oa_version":"Published Version","external_id":{"pmid":["35277488"],"arxiv":["2107.08303"],"isi":["000767892300013"]},"citation":{"apa":"Sahu, R., Hease, W. J., Rueda Sanchez, A. R., Arnold, G. M., Qiu, L., &#38; Fink, J. M. (2022). Quantum-enabled operation of a microwave-optical interface. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-022-28924-2\">https://doi.org/10.1038/s41467-022-28924-2</a>","ista":"Sahu R, Hease WJ, Rueda Sanchez AR, Arnold GM, Qiu L, Fink JM. 2022. Quantum-enabled operation of a microwave-optical interface. Nature Communications. 13, 1276.","mla":"Sahu, Rishabh, et al. “Quantum-Enabled Operation of a Microwave-Optical Interface.” <i>Nature Communications</i>, vol. 13, 1276, Springer Nature, 2022, doi:<a href=\"https://doi.org/10.1038/s41467-022-28924-2\">10.1038/s41467-022-28924-2</a>.","short":"R. Sahu, W.J. Hease, A.R. Rueda Sanchez, G.M. Arnold, L. Qiu, J.M. Fink, Nature Communications 13 (2022).","chicago":"Sahu, Rishabh, William J Hease, Alfredo R Rueda Sanchez, Georg M Arnold, Liu Qiu, and Johannes M Fink. “Quantum-Enabled Operation of a Microwave-Optical Interface.” <i>Nature Communications</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1038/s41467-022-28924-2\">https://doi.org/10.1038/s41467-022-28924-2</a>.","ama":"Sahu R, Hease WJ, Rueda Sanchez AR, Arnold GM, Qiu L, Fink JM. Quantum-enabled operation of a microwave-optical interface. <i>Nature Communications</i>. 2022;13. doi:<a href=\"https://doi.org/10.1038/s41467-022-28924-2\">10.1038/s41467-022-28924-2</a>","ieee":"R. Sahu, W. J. Hease, A. R. Rueda Sanchez, G. M. Arnold, L. Qiu, and J. M. Fink, “Quantum-enabled operation of a microwave-optical interface,” <i>Nature Communications</i>, vol. 13. Springer Nature, 2022."},"related_material":{"record":[{"relation":"dissertation_contains","id":"13175","status":"public"},{"relation":"dissertation_contains","id":"12900","status":"public"},{"relation":"dissertation_contains","id":"18871","status":"public"}]},"fulldoi":"https://doi.org/10.1038/s41467-022-28924-2","acknowledgement":"The authors thank S. Wald and F. Diorico for their help with optical filtering, O. Hosten\r\nand M. Aspelmeyer for equipment, H.G.L. Schwefel for materials and discussions, L.\r\nDrmic and P. Zielinski for software support, and the MIBA workshop at IST Austria for\r\nmachining the microwave cavity. This work was supported by the European Research\r\nCouncil under grant agreement no. 758053 (ERC StG QUNNECT) and the European\r\nUnion’s Horizon 2020 research and innovation program under grant agreement no.\r\n899354 (FETopen SuperQuLAN). W.H. is the recipient of an ISTplus postdoctoral fellowship\r\nwith funding from the European Union’s Horizon 2020 research and innovation\r\nprogram under the Marie Skłodowska-Curie grant agreement no. 754411. G.A. is the\r\nrecipient of a DOC fellowship of the Austrian Academy of Sciences at IST Austria. J.M.F.\r\nacknowledges support from the Austrian Science Fund (FWF) through BeyondC (F7105)\r\nand the European Union’s Horizon 2020 research and innovation programs under grant\r\nagreement no. 862644 (FETopen QUARTET).","intvolume":"        13","volume":13,"ddc":["530"],"acknowledged_ssus":[{"_id":"M-Shop"}],"doi":"10.1038/s41467-022-28924-2","publication_identifier":{"eissn":["2041-1723"]},"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"Solid-state microwave systems offer strong interactions for fast quantum logic and sensing but photons at telecom wavelength are the ideal choice for high-density low-loss quantum interconnects. A general-purpose interface that can make use of single photon effects requires < 1 input noise quanta, which has remained elusive due to either low efficiency or pump induced heating. Here we demonstrate coherent electro-optic modulation on nanosecond-timescales with only 0.16+0.02−0.01 microwave input noise photons with a total bidirectional transduction efficiency of 8.7% (or up to 15% with 0.41+0.02−0.02), as required for near-term heralded quantum network protocols. The use of short and high-power optical pump pulses also enables near-unity cooperativity of the electro-optic interaction leading to an internal pure conversion efficiency of up to 99.5%. Together with the low mode occupancy this provides evidence for electro-optic laser cooling and vacuum amplification as predicted a decade ago."}],"isi":1},{"pmid":1,"project":[{"grant_number":"758053","_id":"26336814-B435-11E9-9278-68D0E5697425","name":"A Fiber Optic Transceiver for Superconducting Qubits","call_identifier":"H2020"},{"grant_number":"862644","_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E","call_identifier":"H2020","name":"Quantum readout techniques and technologies"},{"_id":"258047B6-B435-11E9-9278-68D0E5697425","grant_number":"707438","call_identifier":"H2020","name":"Microwave-to-Optical Quantum Link: Quantum Teleportation and Quantum Illumination with cavity Optomechanics"},{"name":"Hybrid Optomechanical Technologies","call_identifier":"H2020","_id":"257EB838-B435-11E9-9278-68D0E5697425","grant_number":"732894"},{"grant_number":"F07105","_id":"bdb108fd-d553-11ed-ba76-83dc74a9864f","name":"QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration of Superconducting Quantum Circuits"}],"department":[{"_id":"JoFi"}],"corr_author":"1","type":"journal_article","year":"2020","scopus_import":"1","file_date_updated":"2020-07-14T12:48:05Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_status":"published","publisher":"AAAS","article_number":"eabb0451","oa":1,"quality_controlled":"1","date_created":"2020-05-31T22:00:49Z","arxiv":1,"article_type":"original","title":"Microwave quantum illumination using a digital receiver","article_processing_charge":"No","month":"05","date_updated":"2026-04-15T06:42:37Z","file":[{"date_created":"2020-06-02T09:18:36Z","file_size":795822,"file_id":"7913","date_updated":"2020-07-14T12:48:05Z","file_name":"2020_ScienceAdvances_Barzanjeh.pdf","creator":"dernst","relation":"main_file","checksum":"16fa61cc1951b444ee74c07188cda9da","access_level":"open_access","content_type":"application/pdf"}],"publication":"Science Advances","date_published":"2020-05-06T00:00:00Z","author":[{"full_name":"Barzanjeh, Shabir","id":"2D25E1F6-F248-11E8-B48F-1D18A9856A87","first_name":"Shabir","orcid":"0000-0003-0415-1423","last_name":"Barzanjeh"},{"last_name":"Pirandola","first_name":"S.","full_name":"Pirandola, S."},{"full_name":"Vitali, D","last_name":"Vitali","first_name":"D"},{"first_name":"Johannes M","orcid":"0000-0001-8112-028X","last_name":"Fink","full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87"}],"ec_funded":1,"_id":"7910","status":"public","has_accepted_license":"1","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"day":"06","oa_version":"Published Version","external_id":{"isi":["000531171100045"],"arxiv":["1908.03058"],"pmid":["32548249"]},"issue":"19","citation":{"ieee":"S. Barzanjeh, S. Pirandola, D. Vitali, and J. M. Fink, “Microwave quantum illumination using a digital receiver,” <i>Science Advances</i>, vol. 6, no. 19. AAAS, 2020.","ama":"Barzanjeh S, Pirandola S, Vitali D, Fink JM. Microwave quantum illumination using a digital receiver. <i>Science Advances</i>. 2020;6(19). doi:<a href=\"https://doi.org/10.1126/sciadv.abb0451\">10.1126/sciadv.abb0451</a>","short":"S. Barzanjeh, S. Pirandola, D. Vitali, J.M. Fink, Science Advances 6 (2020).","chicago":"Barzanjeh, Shabir, S. Pirandola, D Vitali, and Johannes M Fink. “Microwave Quantum Illumination Using a Digital Receiver.” <i>Science Advances</i>. AAAS, 2020. <a href=\"https://doi.org/10.1126/sciadv.abb0451\">https://doi.org/10.1126/sciadv.abb0451</a>.","mla":"Barzanjeh, Shabir, et al. “Microwave Quantum Illumination Using a Digital Receiver.” <i>Science Advances</i>, vol. 6, no. 19, eabb0451, AAAS, 2020, doi:<a href=\"https://doi.org/10.1126/sciadv.abb0451\">10.1126/sciadv.abb0451</a>.","ista":"Barzanjeh S, Pirandola S, Vitali D, Fink JM. 2020. Microwave quantum illumination using a digital receiver. Science Advances. 6(19), eabb0451.","apa":"Barzanjeh, S., Pirandola, S., Vitali, D., &#38; Fink, J. M. (2020). Microwave quantum illumination using a digital receiver. <i>Science Advances</i>. AAAS. <a href=\"https://doi.org/10.1126/sciadv.abb0451\">https://doi.org/10.1126/sciadv.abb0451</a>"},"related_material":{"record":[{"status":"public","relation":"later_version","id":"9001"}],"link":[{"relation":"press_release","description":"News on IST Homepage","url":"https://ist.ac.at/en/news/scientists-demonstrate-quantum-radar-prototype/"}]},"fulldoi":"https://doi.org/10.1126/sciadv.abb0451","intvolume":"         6","volume":6,"ddc":["530"],"doi":"10.1126/sciadv.abb0451","publication_identifier":{"eissn":["2375-2548"]},"language":[{"iso":"eng"}],"abstract":[{"text":"Quantum illumination uses entangled signal-idler photon pairs to boost the detection efficiency of low-reflectivity objects in environments with bright thermal noise. Its advantage is particularly evident at low signal powers, a promising feature for applications such as noninvasive biomedical scanning or low-power short-range radar. Here, we experimentally investigate the concept of quantum illumination at microwave frequencies. We generate entangled fields to illuminate a room-temperature object at a distance of 1 m in a free-space detection setup. We implement a digital phase-conjugate receiver based on linear quadrature measurements that outperforms a symmetric classical noise radar in the same conditions, despite the entanglement-breaking signal path. Starting from experimental data, we also simulate the case of perfect idler photon number detection, which results in a quantum advantage compared with the relative classical benchmark. Our results highlight the opportunities and challenges in the way toward a first room-temperature application of microwave quantum circuits.","lang":"eng"}],"isi":1},{"publication":"IEEE National Radar Conference - Proceedings","author":[{"first_name":"Shabir","orcid":"0000-0003-0415-1423","last_name":"Barzanjeh","full_name":"Barzanjeh, Shabir","id":"2D25E1F6-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Stefano","last_name":"Pirandola","full_name":"Pirandola, Stefano"},{"first_name":"David","last_name":"Vitali","full_name":"Vitali, David"},{"full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","first_name":"Johannes M","last_name":"Fink","orcid":"0000-0001-8112-028X"}],"date_published":"2020-09-21T00:00:00Z","_id":"9001","conference":{"start_date":"2020-09-21","name":"RadarConf: National Conference on Radar","location":"Florence, Italy","end_date":"2020-09-25"},"ec_funded":1,"arxiv":1,"date_created":"2021-01-10T23:01:17Z","title":"Microwave quantum illumination with a digital phase-conjugated receiver","article_processing_charge":"No","month":"09","date_updated":"2026-04-15T06:42:36Z","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","publisher":"IEEE","publication_status":"published","quality_controlled":"1","article_number":"9266397","oa":1,"department":[{"_id":"JoFi"}],"project":[{"call_identifier":"H2020","name":"A Fiber Optic Transceiver for Superconducting Qubits","grant_number":"758053","_id":"26336814-B435-11E9-9278-68D0E5697425"},{"_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E","grant_number":"862644","call_identifier":"H2020","name":"Quantum readout techniques and technologies"},{"name":"Microwave-to-Optical Quantum Link: Quantum Teleportation and Quantum Illumination with cavity Optomechanics","call_identifier":"H2020","grant_number":"707438","_id":"258047B6-B435-11E9-9278-68D0E5697425"},{"name":"Hybrid Optomechanical Technologies","call_identifier":"H2020","_id":"257EB838-B435-11E9-9278-68D0E5697425","grant_number":"732894"}],"year":"2020","type":"conference","scopus_import":"1","doi":"10.1109/RadarConf2043947.2020.9266397","publication_identifier":{"isbn":["9781728189420"],"issn":["1097-5659"]},"language":[{"iso":"eng"}],"isi":1,"abstract":[{"text":"Quantum illumination is a sensing technique that employs entangled signal-idler beams to improve the detection efficiency of low-reflectivity objects in environments with large thermal noise. The advantage over classical strategies is evident at low signal brightness, a feature which could make the protocol an ideal prototype for non-invasive scanning or low-power short-range radar. Here we experimentally investigate the concept of quantum illumination at microwave frequencies, by generating entangled fields using a Josephson parametric converter which are then amplified to illuminate a room-temperature object at a distance of 1 meter. Starting from experimental data, we simulate the case of perfect idler photon number detection, which results in a quantum advantage compared to the relative classical benchmark. Our results highlight the opportunities and challenges on the way towards a first room-temperature application of microwave quantum circuits.","lang":"eng"}],"fulldoi":"https://doi.org/10.1109/RadarConf2043947.2020.9266397","related_material":{"record":[{"status":"public","id":"7910","relation":"earlier_version"}]},"intvolume":"      2020","acknowledgement":"This work was supported by the Institute of Science and Technology Austria (IST Austria), the European Research Council under grant agreement number 758053 (ERC StG QUNNECT) and the EU’s Horizon 2020 research and innovation programme under grant agreement number 862644 (FET Open QUARTET). S.B. acknowledges support from the Marie Skłodowska Curie\r\nfellowship number 707438 (MSC-IF SUPEREOM), DV acknowledge support from EU’s Horizon 2020 research and innovation programme under grant agreement number 732894 (FET Proactive HOT) and the Project QuaSeRT funded by the QuantERA ERANET Cofund in Quantum Technologies, and J.M.F from the Austrian Science Fund (FWF) through BeyondC (F71), a NOMIS foundation research grant, and the EU’s Horizon 2020 research and\r\ninnovation programme under grant agreement number 732894 (FET Proactive\r\nHOT).","volume":2020,"main_file_link":[{"url":"https://arxiv.org/abs/1908.03058","open_access":"1"}],"day":"21","external_id":{"arxiv":["1908.03058"],"isi":["000612224900089"]},"oa_version":"Preprint","issue":"9","citation":{"ista":"Barzanjeh S, Pirandola S, Vitali D, Fink JM. 2020. Microwave quantum illumination with a digital phase-conjugated receiver. IEEE National Radar Conference - Proceedings. RadarConf: National Conference on Radar vol. 2020, 9266397.","apa":"Barzanjeh, S., Pirandola, S., Vitali, D., &#38; Fink, J. M. (2020). Microwave quantum illumination with a digital phase-conjugated receiver. In <i>IEEE National Radar Conference - Proceedings</i> (Vol. 2020). Florence, Italy: IEEE. <a href=\"https://doi.org/10.1109/RadarConf2043947.2020.9266397\">https://doi.org/10.1109/RadarConf2043947.2020.9266397</a>","ama":"Barzanjeh S, Pirandola S, Vitali D, Fink JM. Microwave quantum illumination with a digital phase-conjugated receiver. In: <i>IEEE National Radar Conference - Proceedings</i>. Vol 2020. IEEE; 2020. doi:<a href=\"https://doi.org/10.1109/RadarConf2043947.2020.9266397\">10.1109/RadarConf2043947.2020.9266397</a>","chicago":"Barzanjeh, Shabir, Stefano Pirandola, David Vitali, and Johannes M Fink. “Microwave Quantum Illumination with a Digital Phase-Conjugated Receiver.” In <i>IEEE National Radar Conference - Proceedings</i>, Vol. 2020. IEEE, 2020. <a href=\"https://doi.org/10.1109/RadarConf2043947.2020.9266397\">https://doi.org/10.1109/RadarConf2043947.2020.9266397</a>.","short":"S. Barzanjeh, S. Pirandola, D. Vitali, J.M. Fink, in:, IEEE National Radar Conference - Proceedings, IEEE, 2020.","ieee":"S. Barzanjeh, S. Pirandola, D. Vitali, and J. M. Fink, “Microwave quantum illumination with a digital phase-conjugated receiver,” in <i>IEEE National Radar Conference - Proceedings</i>, Florence, Italy, 2020, vol. 2020, no. 9.","mla":"Barzanjeh, Shabir, et al. “Microwave Quantum Illumination with a Digital Phase-Conjugated Receiver.” <i>IEEE National Radar Conference - Proceedings</i>, vol. 2020, no. 9, 9266397, IEEE, 2020, doi:<a href=\"https://doi.org/10.1109/RadarConf2043947.2020.9266397\">10.1109/RadarConf2043947.2020.9266397</a>."},"status":"public"},{"article_processing_charge":"No","month":"10","date_updated":"2026-10-02T11:28:16Z","date_created":"2020-11-15T23:01:17Z","arxiv":1,"article_type":"original","title":"Surpassing the resistance quantum with a geometric superinductor","ec_funded":1,"_id":"8755","file":[{"content_type":"application/pdf","access_level":"open_access","relation":"main_file","checksum":"2a634abe75251ae7628cd54c8a4ce2e8","file_name":"2020_PhysReviewApplied_Peruzzo.pdf","creator":"dernst","success":1,"file_id":"9300","date_updated":"2021-03-29T11:43:20Z","file_size":2607823,"date_created":"2021-03-29T11:43:20Z"}],"publication":"Physical Review Applied","date_published":"2020-10-29T00:00:00Z","author":[{"orcid":"0000-0002-3415-4628","last_name":"Peruzzo","first_name":"Matilda","id":"3F920B30-F248-11E8-B48F-1D18A9856A87","full_name":"Peruzzo, Matilda"},{"first_name":"Andrea","last_name":"Trioni","full_name":"Trioni, Andrea","id":"42F71B44-F248-11E8-B48F-1D18A9856A87"},{"id":"2AED110C-F248-11E8-B48F-1D18A9856A87","full_name":"Hassani, Farid","last_name":"Hassani","orcid":"0000-0001-6937-5773","first_name":"Farid"},{"last_name":"Zemlicka","orcid":"0009-0005-0878-3032","first_name":"Martin","id":"2DCF8DE6-F248-11E8-B48F-1D18A9856A87","full_name":"Zemlicka, Martin"},{"first_name":"Johannes M","last_name":"Fink","orcid":"0000-0001-8112-028X","full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87"}],"project":[{"_id":"257EB838-B435-11E9-9278-68D0E5697425","grant_number":"732894","call_identifier":"H2020","name":"Hybrid Optomechanical Technologies"},{"grant_number":"862644","_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E","call_identifier":"H2020","name":"Quantum readout techniques and technologies"},{"name":"A Fiber Optic Transceiver for Superconducting Qubits","call_identifier":"H2020","_id":"26336814-B435-11E9-9278-68D0E5697425","grant_number":"758053"},{"grant_number":"F07105","_id":"bdb108fd-d553-11ed-ba76-83dc74a9864f","name":"QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration of Superconducting Quantum Circuits"}],"department":[{"_id":"JoFi"}],"scopus_import":"1","year":"2020","type":"journal_article","oa":1,"quality_controlled":"1","article_number":"044055","file_date_updated":"2021-03-29T11:43:20Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_status":"published","publisher":"American Physical Society","volume":14,"acknowledged_ssus":[{"_id":"NanoFab"}],"ddc":["530"],"related_material":{"record":[{"status":"public","relation":"research_data","id":"13070"},{"status":"public","id":"9920","relation":"dissertation_contains"},{"status":"public","relation":"dissertation_contains","id":"20371"},{"status":"public","id":"17133","relation":"dissertation_contains"}]},"fulldoi":"https://doi.org/10.1103/PhysRevApplied.14.044055","intvolume":"        14","acknowledgement":"The authors acknowledge the support from I. Prieto and the IST Nanofabrication Facility. This work was supported by IST Austria and a NOMIS foundation research grant and the Austrian Science Fund (FWF) through BeyondC (F71). MP is the recipient of a P¨ottinger scholarship at IST Austria. JMF acknowledges support from the European Union’s Horizon 2020 research and innovation programs under grant agreement No 732894 (FET Proactive HOT), 862644 (FET Open QUARTET), and the European Research Council under grant agreement\r\nnumber 758053 (ERC StG QUNNECT). ","language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"The superconducting circuit community has recently discovered the promising potential of superinductors. These circuit elements have a characteristic impedance exceeding the resistance quantum RQ ≈ 6.45 kΩ which leads to a suppression of ground state charge fluctuations. Applications include the realization of hardware protected qubits for fault tolerant quantum computing, improved coupling to small dipole moment objects and defining a new quantum metrology standard for the ampere. In this work we refute the widespread notion that superinductors can only be implemented based on kinetic inductance, i.e. using disordered superconductors or Josephson junction arrays. We present modeling, fabrication and characterization of 104 planar aluminum coil resonators with a characteristic impedance up to 30.9 kΩ at 5.6 GHz and a capacitance down to ≤ 1 fF, with lowloss and a power handling reaching 108 intra-cavity photons. Geometric superinductors are free of uncontrolled tunneling events and offer high reproducibility, linearity and the ability to couple magnetically - properties that significantly broaden the scope of future quantum circuits. "}],"isi":1,"doi":"10.1103/PhysRevApplied.14.044055","publication_identifier":{"eissn":["2331-7019"]},"has_accepted_license":"1","status":"public","issue":"4","citation":{"ista":"Peruzzo M, Trioni A, Hassani F, Zemlicka M, Fink JM. 2020. Surpassing the resistance quantum with a geometric superinductor. Physical Review Applied. 14(4), 044055.","apa":"Peruzzo, M., Trioni, A., Hassani, F., Zemlicka, M., &#38; Fink, J. M. (2020). Surpassing the resistance quantum with a geometric superinductor. <i>Physical Review Applied</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevApplied.14.044055\">https://doi.org/10.1103/PhysRevApplied.14.044055</a>","short":"M. Peruzzo, A. Trioni, F. Hassani, M. Zemlicka, J.M. Fink, Physical Review Applied 14 (2020).","chicago":"Peruzzo, Matilda, Andrea Trioni, Farid Hassani, Martin Zemlicka, and Johannes M Fink. “Surpassing the Resistance Quantum with a Geometric Superinductor.” <i>Physical Review Applied</i>. American Physical Society, 2020. <a href=\"https://doi.org/10.1103/PhysRevApplied.14.044055\">https://doi.org/10.1103/PhysRevApplied.14.044055</a>.","ama":"Peruzzo M, Trioni A, Hassani F, Zemlicka M, Fink JM. Surpassing the resistance quantum with a geometric superinductor. <i>Physical Review Applied</i>. 2020;14(4). doi:<a href=\"https://doi.org/10.1103/PhysRevApplied.14.044055\">10.1103/PhysRevApplied.14.044055</a>","ieee":"M. Peruzzo, A. Trioni, F. Hassani, M. Zemlicka, and J. M. Fink, “Surpassing the resistance quantum with a geometric superinductor,” <i>Physical Review Applied</i>, vol. 14, no. 4. American Physical Society, 2020.","mla":"Peruzzo, Matilda, et al. “Surpassing the Resistance Quantum with a Geometric Superinductor.” <i>Physical Review Applied</i>, vol. 14, no. 4, 044055, American Physical Society, 2020, doi:<a href=\"https://doi.org/10.1103/PhysRevApplied.14.044055\">10.1103/PhysRevApplied.14.044055</a>."},"day":"29","oa_version":"Published Version","external_id":{"isi":["000582797300003"],"arxiv":["2007.01644"]}},{"doi":"10.1038/s41467-020-18269-z","publication_identifier":{"issn":["2041-1723"]},"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"Practical quantum networks require low-loss and noise-resilient optical interconnects as well as non-Gaussian resources for entanglement distillation and distributed quantum computation. The latter could be provided by superconducting circuits but existing solutions to interface the microwave and optical domains lack either scalability or efficiency, and in most cases the conversion noise is not known. In this work we utilize the unique opportunities of silicon photonics, cavity optomechanics and superconducting circuits to demonstrate a fully integrated, coherent transducer interfacing the microwave X and the telecom S bands with a total (internal) bidirectional transduction efficiency of 1.2% (135%) at millikelvin temperatures. The coupling relies solely on the radiation pressure interaction mediated by the femtometer-scale motion of two silicon nanobeams reaching a <jats:italic>V</jats:italic><jats:sub><jats:italic>π</jats:italic></jats:sub> as low as 16 μV for sub-nanowatt pump powers. Without the associated optomechanical gain, we achieve a total (internal) pure conversion efficiency of up to 0.019% (1.6%), relevant for future noise-free operation on this qubit-compatible platform."}],"isi":1,"related_material":{"record":[{"status":"public","id":"13056","relation":"research_data"},{"status":"public","relation":"dissertation_contains","id":"18871"}],"link":[{"relation":"erratum","url":"https://doi.org/10.1038/s41467-020-18912-9"},{"url":"https://ist.ac.at/en/news/how-to-transport-microwave-quantum-information-via-optical-fiber/","description":"News on IST Homepage","relation":"press_release"}]},"fulldoi":"https://doi.org/10.1038/s41467-020-18269-z","acknowledgement":"We thank Yuan Chen for performing supplementary FEM simulations and Andrew Higginbotham, Ralf Riedinger, Sungkun Hong, and Lorenzo Magrini for valuable discussions. This work was supported by IST Austria, the IST nanofabrication facility (NFF), the European Union’s Horizon 2020 research and innovation program under grant agreement no. 732894 (FET Proactive HOT) and the European Research Council under grant agreement no. 758053 (ERC StG QUNNECT). G.A. is the recipient of a DOC fellowship of the Austrian Academy of Sciences at IST Austria. W.H. is the recipient of an ISTplus postdoctoral fellowship with funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement no. 754411. J.M.F. acknowledges support from the Austrian Science Fund (FWF) through BeyondC (F71), a NOMIS foundation research grant, and the EU’s Horizon 2020 research and innovation program under grant agreement no. 862644 (FET Open QUARTET).","intvolume":"        11","volume":11,"ddc":["530"],"acknowledged_ssus":[{"_id":"NanoFab"}],"day":"08","oa_version":"Published Version","keyword":["General Biochemistry","Genetics and Molecular Biology","General Physics and Astronomy","General Chemistry"],"external_id":{"pmid":["32901014"],"isi":["000577280200001"]},"citation":{"mla":"Arnold, Georg M., et al. “Converting Microwave and Telecom Photons with a Silicon Photonic Nanomechanical Interface.” <i>Nature Communications</i>, vol. 11, 4460, Springer Nature, 2020, doi:<a href=\"https://doi.org/10.1038/s41467-020-18269-z\">10.1038/s41467-020-18269-z</a>.","ieee":"G. M. Arnold <i>et al.</i>, “Converting microwave and telecom photons with a silicon photonic nanomechanical interface,” <i>Nature Communications</i>, vol. 11. Springer Nature, 2020.","short":"G.M. Arnold, M. Wulf, S. Barzanjeh, E. Redchenko, A.R. Rueda Sanchez, W.J. Hease, F. Hassani, J.M. Fink, Nature Communications 11 (2020).","ama":"Arnold GM, Wulf M, Barzanjeh S, et al. Converting microwave and telecom photons with a silicon photonic nanomechanical interface. <i>Nature Communications</i>. 2020;11. doi:<a href=\"https://doi.org/10.1038/s41467-020-18269-z\">10.1038/s41467-020-18269-z</a>","chicago":"Arnold, Georg M, Matthias Wulf, Shabir Barzanjeh, Elena Redchenko, Alfredo R Rueda Sanchez, William J Hease, Farid Hassani, and Johannes M Fink. “Converting Microwave and Telecom Photons with a Silicon Photonic Nanomechanical Interface.” <i>Nature Communications</i>. Springer Nature, 2020. <a href=\"https://doi.org/10.1038/s41467-020-18269-z\">https://doi.org/10.1038/s41467-020-18269-z</a>.","apa":"Arnold, G. M., Wulf, M., Barzanjeh, S., Redchenko, E., Rueda Sanchez, A. R., Hease, W. J., … Fink, J. M. (2020). Converting microwave and telecom photons with a silicon photonic nanomechanical interface. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-020-18269-z\">https://doi.org/10.1038/s41467-020-18269-z</a>","ista":"Arnold GM, Wulf M, Barzanjeh S, Redchenko E, Rueda Sanchez AR, Hease WJ, Hassani F, Fink JM. 2020. Converting microwave and telecom photons with a silicon photonic nanomechanical interface. Nature Communications. 11, 4460."},"has_accepted_license":"1","status":"public","tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"publication":"Nature Communications","file":[{"date_created":"2020-09-18T13:02:37Z","file_size":1002818,"date_updated":"2020-09-18T13:02:37Z","success":1,"file_id":"8530","relation":"main_file","checksum":"88f92544889eb18bb38e25629a422a86","creator":"dernst","file_name":"2020_NatureComm_Arnold.pdf","content_type":"application/pdf","access_level":"open_access"}],"date_published":"2020-09-08T00:00:00Z","author":[{"id":"3770C838-F248-11E8-B48F-1D18A9856A87","full_name":"Arnold, Georg M","last_name":"Arnold","orcid":"0000-0003-1397-7876","first_name":"Georg M"},{"first_name":"Matthias","orcid":"0000-0001-6613-1378","last_name":"Wulf","full_name":"Wulf, Matthias","id":"45598606-F248-11E8-B48F-1D18A9856A87"},{"orcid":"0000-0003-0415-1423","last_name":"Barzanjeh","first_name":"Shabir","id":"2D25E1F6-F248-11E8-B48F-1D18A9856A87","full_name":"Barzanjeh, Shabir"},{"first_name":"Elena","last_name":"Redchenko","full_name":"Redchenko, Elena","id":"2C21D6E8-F248-11E8-B48F-1D18A9856A87"},{"id":"3B82B0F8-F248-11E8-B48F-1D18A9856A87","full_name":"Rueda Sanchez, Alfredo R","last_name":"Rueda Sanchez","orcid":"0000-0001-6249-5860","first_name":"Alfredo R"},{"id":"29705398-F248-11E8-B48F-1D18A9856A87","full_name":"Hease, William J","last_name":"Hease","orcid":"0000-0001-9868-2166","first_name":"William J"},{"last_name":"Hassani","orcid":"0000-0001-6937-5773","first_name":"Farid","id":"2AED110C-F248-11E8-B48F-1D18A9856A87","full_name":"Hassani, Farid"},{"first_name":"Johannes M","last_name":"Fink","orcid":"0000-0001-8112-028X","full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87"}],"ec_funded":1,"_id":"8529","date_created":"2020-09-18T10:56:20Z","article_type":"original","title":"Converting microwave and telecom photons with a silicon photonic nanomechanical interface","article_processing_charge":"No","date_updated":"2026-11-07T23:30:29Z","month":"09","file_date_updated":"2020-09-18T13:02:37Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication_status":"published","publisher":"Springer Nature","article_number":"4460","oa":1,"quality_controlled":"1","pmid":1,"project":[{"name":"Hybrid Optomechanical Technologies","call_identifier":"H2020","grant_number":"732894","_id":"257EB838-B435-11E9-9278-68D0E5697425"},{"name":"A Fiber Optic Transceiver for Superconducting Qubits","call_identifier":"H2020","_id":"26336814-B435-11E9-9278-68D0E5697425","grant_number":"758053"},{"name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425"},{"grant_number":"862644","_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E","call_identifier":"H2020","name":"Quantum readout techniques and technologies"},{"name":"Coherent on-chip conversion of superconducting qubit signals from microwaves to optical frequencies","_id":"2671EB66-B435-11E9-9278-68D0E5697425"}],"department":[{"_id":"JoFi"}],"corr_author":"1","scopus_import":"1","year":"2020","type":"journal_article"}]