[{"file":[{"success":1,"file_name":"2026_CommunicationsPhysics_Agafonova.pdf","file_id":"21457","creator":"dernst","date_updated":"2026-03-16T10:07:46Z","content_type":"application/pdf","file_size":1901772,"relation":"main_file","date_created":"2026-03-16T10:07:46Z","checksum":"62e2175e7e3ad49260ae6a7b4e0860a2","access_level":"open_access"}],"day":"04","PlanS_conform":"1","year":"2026","article_type":"original","publisher":"Springer Nature","date_updated":"2026-06-10T08:36:06Z","status":"public","publication_status":"published","has_accepted_license":"1","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png"},"intvolume":"         9","author":[{"first_name":"Sofya","last_name":"Agafonova","orcid":"0000-0003-0582-2946","full_name":"Agafonova, Sofya","id":"09501ff6-dca7-11ea-a8ae-b3e0b9166e80"},{"full_name":"Rosello, Pere","first_name":"Pere","last_name":"Rosello"},{"full_name":"Mekonnen, Manuel","last_name":"Mekonnen","first_name":"Manuel"},{"id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","full_name":"Hosten, Onur","orcid":"0000-0002-2031-204X","last_name":"Hosten","first_name":"Onur"}],"date_published":"2026-03-04T00:00:00Z","ddc":["530"],"OA_type":"gold","corr_author":"1","DOAJ_listed":"1","department":[{"_id":"GradSch"},{"_id":"OnHo"}],"oa_version":"Published Version","oa":1,"language":[{"iso":"eng"}],"quality_controlled":"1","OA_place":"publisher","scopus_import":"1","citation":{"ista":"Agafonova S, Rosello P, Mekonnen M, Hosten O. 2026. One-milligram torsional pendulum toward experiments at the quantum-gravity interface. Communications Physics. 9, 80.","apa":"Agafonova, S., Rosello, P., Mekonnen, M., &#38; Hosten, O. (2026). One-milligram torsional pendulum toward experiments at the quantum-gravity interface. <i>Communications Physics</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s42005-026-02514-w\">https://doi.org/10.1038/s42005-026-02514-w</a>","short":"S. Agafonova, P. Rosello, M. Mekonnen, O. Hosten, Communications Physics 9 (2026).","ieee":"S. Agafonova, P. Rosello, M. Mekonnen, and O. Hosten, “One-milligram torsional pendulum toward experiments at the quantum-gravity interface,” <i>Communications Physics</i>, vol. 9. Springer Nature, 2026.","mla":"Agafonova, Sofia, et al. “One-Milligram Torsional Pendulum toward Experiments at the Quantum-Gravity Interface.” <i>Communications Physics</i>, vol. 9, 80, Springer Nature, 2026, doi:<a href=\"https://doi.org/10.1038/s42005-026-02514-w\">10.1038/s42005-026-02514-w</a>.","ama":"Agafonova S, Rosello P, Mekonnen M, Hosten O. One-milligram torsional pendulum toward experiments at the quantum-gravity interface. <i>Communications Physics</i>. 2026;9. doi:<a href=\"https://doi.org/10.1038/s42005-026-02514-w\">10.1038/s42005-026-02514-w</a>","chicago":"Agafonova, Sofia, Pere Rosello, Manuel Mekonnen, and Onur Hosten. “One-Milligram Torsional Pendulum toward Experiments at the Quantum-Gravity Interface.” <i>Communications Physics</i>. Springer Nature, 2026. <a href=\"https://doi.org/10.1038/s42005-026-02514-w\">https://doi.org/10.1038/s42005-026-02514-w</a>."},"month":"03","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","type":"journal_article","doi":"10.1038/s42005-026-02514-w","date_created":"2025-12-21T11:39:04Z","related_material":{"record":[{"id":"20842","relation":"research_data","status":"public"}]},"_id":"20840","publication_identifier":{"eissn":["2399-3650"]},"acknowledgement":"We thank Gerard Higgins, Andrei Militaru, Nikolai Kiesel, and Markus Aspelmeyer for useful discussions on the topic of the figure-of-merit. We thank Teodor Strömberg for helping with the additional characterizations of the optical lever noise. We thank Johannes Fink and Scott Waitukaitis for their helpful feedback on the manuscript. This work was supported by Institute of Science and Technology Austria and the European Research Council under Grant No. 101087907 (ERC CoG QuHAMP).","project":[{"grant_number":"101087907","_id":"bdb2a702-d553-11ed-ba76-f12e3e5a3bc6","name":"A quantum hybrid of atoms and milligram-scale pendulums: towards gravitational quantum mechanics"}],"article_processing_charge":"Yes","external_id":{"arxiv":["2408.09445"]},"arxiv":1,"article_number":"80","title":"One-milligram torsional pendulum toward experiments at the quantum-gravity interface","file_date_updated":"2026-03-16T10:07:46Z","abstract":[{"text":"Probing the possibility of entanglement generation through gravity offers a path to tackle the question of whether gravitational fields possess a quantum mechanical nature. A potential realization necessitates systems with low-frequency dynamics at an optimal mass scale, for which the microgram-to-milligram range is a strong contender. Here, after refining a figure-of-merit for the problem, we present a 1-milligram torsional pendulum operating at 18 Hz. We demonstrate laser cooling its motion from room temperature to 240 microkelvins, surpassing by over 20-fold the coldest motions attained for oscillators ranging from micrograms to kilograms. We quantify and contrast the utility of the current approach with other platforms. The achieved performance and large improvement potential highlight milligram-scale torsional pendulums as a powerful platform for precision measurements relevant to future studies at the quantum-gravity interface.","lang":"eng"}],"publication":"Communications Physics","volume":9},{"author":[{"orcid":"0000-0003-0582-2946","full_name":"Agafonova, Sofya","id":"09501ff6-dca7-11ea-a8ae-b3e0b9166e80","first_name":"Sofya","last_name":"Agafonova"}],"title":"Research Data for: 'One-milligram torsional pendulum toward experiments at the quantum-gravity interface'","file_date_updated":"2025-12-22T13:51:09Z","date_published":"2025-12-22T00:00:00Z","abstract":[{"text":"Probing the possibility of entanglement generation through gravity offers a path to tackle the question of whether gravitational fields possess a quantum mechanical nature. A potential realization necessitates systems with low-frequency dynamics at an optimal mass scale, for which the microgram-to-milligram range is a strong contender. Here, after refining a figure-of-merit for the problem, we present a 1-milligram torsional pendulum operating at 18 Hz. We demonstrate laser cooling its motion from room temperature to 240~microkelvins, surpassing by over 20-fold the coldest motions attained for oscillators ranging from micrograms to kilograms. We quantify and contrast the utility of the current approach with other platforms. The achieved performance and large improvement potential highlight milligram-scale torsional pendulums as a powerful platform for precision measurements relevant to future studies at the quantum-gravity interface.","lang":"eng"}],"corr_author":"1","project":[{"name":"A quantum hybrid of atoms and milligram-scale pendulums: towards gravitational quantum mechanics","_id":"bdb2a702-d553-11ed-ba76-f12e3e5a3bc6","grant_number":"101087907"}],"contributor":[{"first_name":"Pere","last_name":"Rosello"},{"last_name":"Mekonnen","first_name":"Manuel"},{"first_name":"Onur","last_name":"Hosten","id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","contributor_type":"supervisor","orcid":"0000-0002-2031-204X"}],"has_accepted_license":"1","article_processing_charge":"No","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png"},"citation":{"chicago":"Agafonova, Sofia. “Research Data for: ‘One-Milligram Torsional Pendulum toward Experiments at the Quantum-Gravity Interface.’” Institute of Science and Technology Austria, 2025. <a href=\"https://doi.org/10.15479/AT-ISTA-20842\">https://doi.org/10.15479/AT-ISTA-20842</a>.","ama":"Agafonova S. Research Data for: “One-milligram torsional pendulum toward experiments at the quantum-gravity interface.” 2025. doi:<a href=\"https://doi.org/10.15479/AT-ISTA-20842\">10.15479/AT-ISTA-20842</a>","mla":"Agafonova, Sofia. <i>Research Data for: “One-Milligram Torsional Pendulum toward Experiments at the Quantum-Gravity Interface.”</i> Institute of Science and Technology Austria, 2025, doi:<a href=\"https://doi.org/10.15479/AT-ISTA-20842\">10.15479/AT-ISTA-20842</a>.","ieee":"S. Agafonova, “Research Data for: ‘One-milligram torsional pendulum toward experiments at the quantum-gravity interface.’” Institute of Science and Technology Austria, 2025.","short":"S. Agafonova, (2025).","apa":"Agafonova, S. (2025). Research Data for: “One-milligram torsional pendulum toward experiments at the quantum-gravity interface.” Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/AT-ISTA-20842\">https://doi.org/10.15479/AT-ISTA-20842</a>","ista":"Agafonova S. 2025. Research Data for: ‘One-milligram torsional pendulum toward experiments at the quantum-gravity interface’, Institute of Science and Technology Austria, <a href=\"https://doi.org/10.15479/AT-ISTA-20842\">10.15479/AT-ISTA-20842</a>."},"publisher":"Institute of Science and Technology Austria","date_updated":"2026-06-10T08:36:07Z","month":"12","user_id":"68b8ca59-c5b3-11ee-8790-cd641c68093d","type":"research_data","date_created":"2025-12-21T14:23:50Z","status":"public","doi":"10.15479/AT-ISTA-20842","related_material":{"record":[{"id":"20840","relation":"used_in_publication","status":"public"}]},"_id":"20842","department":[{"_id":"GradSch"},{"_id":"OnHo"}],"oa_version":"Published Version","oa":1,"file":[{"file_id":"20854","file_name":"AllData.zip","success":1,"access_level":"open_access","checksum":"7af34e4226a00cdcb7f154272050e217","date_created":"2025-12-22T13:45:30Z","relation":"main_file","file_size":146656591,"content_type":"application/x-zip-compressed","date_updated":"2025-12-22T13:45:30Z","creator":"sagafono"},{"creator":"sagafono","date_updated":"2025-12-22T13:45:33Z","content_type":"application/x-zip-compressed","file_size":93470129,"relation":"main_file","checksum":"71806a2ef9fb26ad7b78e04c6754ee4e","date_created":"2025-12-22T13:45:33Z","access_level":"open_access","success":1,"file_name":"SourceData.zip","file_id":"20855"},{"file_name":"readme.txt","file_id":"20856","success":1,"date_created":"2025-12-22T13:51:09Z","checksum":"08facd1b4a102f83e4d99d48a85b258d","relation":"main_file","access_level":"open_access","creator":"sagafono","file_size":461,"date_updated":"2025-12-22T13:51:09Z","content_type":"text/plain"}],"day":"22","year":"2025"},{"day":"05","year":"2024","file":[{"success":1,"file_id":"14981","file_name":"2024_PhysicalRevResearch_Agafonova.pdf","file_size":1437167,"date_updated":"2024-02-12T11:46:50Z","content_type":"application/pdf","creator":"dernst","access_level":"open_access","checksum":"3a39ebffb24c1cc1dd0b547a726dc52d","date_created":"2024-02-12T11:46:50Z","relation":"main_file"}],"status":"public","publication_status":"published","article_type":"original","publisher":"American Physical Society","date_updated":"2025-05-08T09:34:07Z","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)","image":"/images/cc_by.png"},"intvolume":"         6","has_accepted_license":"1","APC_amount":"2933,65 EUR","date_published":"2024-02-05T00:00:00Z","ddc":["530"],"corr_author":"1","OA_type":"gold","author":[{"last_name":"Agafonova","first_name":"Sofya","id":"09501ff6-dca7-11ea-a8ae-b3e0b9166e80","full_name":"Agafonova, Sofya","orcid":"0000-0003-0582-2946"},{"first_name":"Umang","last_name":"Mishra","full_name":"Mishra, Umang","id":"4328fa4c-f128-11eb-9611-c107b0fe4d51"},{"full_name":"Diorico, Fritz R","id":"2E054C4C-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-4947-8924","first_name":"Fritz R","last_name":"Diorico"},{"first_name":"Onur","last_name":"Hosten","orcid":"0000-0002-2031-204X","full_name":"Hosten, Onur","id":"4C02D85E-F248-11E8-B48F-1D18A9856A87"}],"issue":"1","quality_controlled":"1","language":[{"iso":"eng"}],"OA_place":"publisher","department":[{"_id":"OnHo"}],"DOAJ_listed":"1","oa":1,"oa_version":"Published Version","doi":"10.1103/physrevresearch.6.013141","date_created":"2024-02-12T11:42:18Z","publication_identifier":{"eissn":["2643-1564"]},"_id":"14980","acknowledgement":"We thank Pere Rosselló for his contributions to the initial modeling of the presented sensing technique. This work was supported by Institute of Science and Technology Austria, and\r\nthe European Research Council under Grant No. 101087907 (ERC CoG QuHAMP).","scopus_import":"1","citation":{"apa":"Agafonova, S., Mishra, U., Diorico, F. R., &#38; Hosten, O. (2024). Zigzag optical cavity for sensing and controlling torsional motion. <i>Physical Review Research</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevresearch.6.013141\">https://doi.org/10.1103/physrevresearch.6.013141</a>","ista":"Agafonova S, Mishra U, Diorico FR, Hosten O. 2024. Zigzag optical cavity for sensing and controlling torsional motion. Physical Review Research. 6(1), 013141.","ama":"Agafonova S, Mishra U, Diorico FR, Hosten O. Zigzag optical cavity for sensing and controlling torsional motion. <i>Physical Review Research</i>. 2024;6(1). doi:<a href=\"https://doi.org/10.1103/physrevresearch.6.013141\">10.1103/physrevresearch.6.013141</a>","chicago":"Agafonova, Sofya, Umang Mishra, Fritz R Diorico, and Onur Hosten. “Zigzag Optical Cavity for Sensing and Controlling Torsional Motion.” <i>Physical Review Research</i>. American Physical Society, 2024. <a href=\"https://doi.org/10.1103/physrevresearch.6.013141\">https://doi.org/10.1103/physrevresearch.6.013141</a>.","short":"S. Agafonova, U. Mishra, F.R. Diorico, O. Hosten, Physical Review Research 6 (2024).","mla":"Agafonova, Sofya, et al. “Zigzag Optical Cavity for Sensing and Controlling Torsional Motion.” <i>Physical Review Research</i>, vol. 6, no. 1, 013141, American Physical Society, 2024, doi:<a href=\"https://doi.org/10.1103/physrevresearch.6.013141\">10.1103/physrevresearch.6.013141</a>.","ieee":"S. Agafonova, U. Mishra, F. R. Diorico, and O. Hosten, “Zigzag optical cavity for sensing and controlling torsional motion,” <i>Physical Review Research</i>, vol. 6, no. 1. American Physical Society, 2024."},"month":"02","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","type":"journal_article","arxiv":1,"project":[{"grant_number":"101087907","_id":"bdb2a702-d553-11ed-ba76-f12e3e5a3bc6","name":"A quantum hybrid of atoms and milligram-scale pendulums: towards gravitational quantum mechanics"}],"external_id":{"arxiv":["2306.12804"]},"article_processing_charge":"Yes","file_date_updated":"2024-02-12T11:46:50Z","abstract":[{"lang":"eng","text":"Precision sensing and manipulation of milligram-scale mechanical oscillators has attracted growing interest in the fields of table-top explorations of gravity and tests of quantum mechanics at macroscopic scales. Torsional oscillators present an opportunity in this regard due to their remarked isolation from environmental noise. For torsional motion, an effective employment of optical cavities to enhance optomechanical interactions—as already established for linear oscillators—so far faced certain challenges. Here, we propose a concept for sensing and manipulating torsional motion, where exclusively the torsional rotations of a pendulum are mapped onto the path length of a single two-mirror optical cavity. The concept inherently alleviates many limitations of previous approaches. A proof-of-principle experiment is conducted with a rigidly controlled pendulum to explore the sensing aspects of the concept and to identify practical limitations in a potential state-of-the art setup. Based on this study, we anticipate development of precision torque sensors utilizing torsional pendulums that can support sensitivities below 10−19Nm/√Hz, while the motion of the pendulums are dominated by quantum radiation pressure noise at sub-microwatts of incoming laser power. These developments will provide horizons for experiments at the interface of quantum mechanics and gravity."}],"publication":"Physical Review Research","volume":6,"title":"Zigzag optical cavity for sensing and controlling torsional motion","article_number":"013141"},{"file_date_updated":"2024-07-11T10:26:22Z","alternative_title":["ISTA Thesis"],"abstract":[{"lang":"eng","text":"This thesis describes the development of an atom interferometer designed to exploit the\r\nadvantages of utilizing quantum entanglement for enhanced precision measurements beyond\r\nthe standard quantum limit. While the project remains ongoing, significant progress has been\r\nmade.\r\nA key contribution of this work is the development of Quantrol, an experimental control\r\nsystem leveraging the ARTIQ framework. This software enables precise timing and control\r\nwithout requiring prior knowledge of ARTIQ’s implementation details or coding experience.\r\nThe interface offers user friendly visual comprehension of the experimental sequence and\r\nextended capabilities, allowing researchers to scan variables with a simple click of a mouse.\r\nThe main proposed project is to implement atom interferometric sequence with squeezed input\r\nstates inside of a dipole trap generated by a high finesse cavity. The presence of the dipole\r\ntrap allows one dimensional atomic cloud split while maintaining relatively strong confinement\r\nin other directions.\r\nWe are currently able to trap and cool 87Rb atoms to few micro kelvin temperatures, load\r\nthem into the dipole trap and state prepare them to be used for squeezing and interferometric\r\nsequence."}],"title":"Towards a quantum entanglement enhanced atom interferomter","project":[{"_id":"bdb2a702-d553-11ed-ba76-f12e3e5a3bc6","grant_number":"101087907","name":"A quantum hybrid of atoms and milligram-scale pendulums: towards gravitational quantum mechanics"}],"supervisor":[{"first_name":"Onur","last_name":"Hosten","full_name":"Hosten, Onur","id":"4C02D85E-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-2031-204X"}],"article_processing_charge":"No","page":"79","_id":"17225","related_material":{"record":[{"id":"11438","relation":"part_of_dissertation","status":"public"}]},"publication_identifier":{"issn":["2663-337X"]},"doi":"10.15479/at:ista:17225","date_created":"2024-07-11T09:46:48Z","citation":{"ista":"Li V. 2024. Towards a quantum entanglement enhanced atom interferomter. Institute of Science and Technology Austria.","apa":"Li, V. (2024). <i>Towards a quantum entanglement enhanced atom interferomter</i>. Institute of Science and Technology Austria. <a href=\"https://doi.org/10.15479/at:ista:17225\">https://doi.org/10.15479/at:ista:17225</a>","short":"V. Li, Towards a Quantum Entanglement Enhanced Atom Interferomter, Institute of Science and Technology Austria, 2024.","ieee":"V. Li, “Towards a quantum entanglement enhanced atom interferomter,” Institute of Science and Technology Austria, 2024.","mla":"Li, Vyacheslav. <i>Towards a Quantum Entanglement Enhanced Atom Interferomter</i>. Institute of Science and Technology Austria, 2024, doi:<a href=\"https://doi.org/10.15479/at:ista:17225\">10.15479/at:ista:17225</a>.","ama":"Li V. Towards a quantum entanglement enhanced atom interferomter. 2024. doi:<a href=\"https://doi.org/10.15479/at:ista:17225\">10.15479/at:ista:17225</a>","chicago":"Li, Vyacheslav. “Towards a Quantum Entanglement Enhanced Atom Interferomter.” Institute of Science and Technology Austria, 2024. <a href=\"https://doi.org/10.15479/at:ista:17225\">https://doi.org/10.15479/at:ista:17225</a>."},"degree_awarded":"PhD","type":"dissertation","user_id":"ba8df636-2132-11f1-aed0-ed93e2281fdd","month":"07","language":[{"iso":"eng"}],"OA_place":"publisher","department":[{"_id":"GradSch"},{"_id":"OnHo"}],"oa_version":"Published Version","oa":1,"ddc":["530"],"date_published":"2024-07-11T00:00:00Z","corr_author":"1","author":[{"first_name":"Vyacheslav","last_name":"Li","full_name":"Li, Vyacheslav","id":"3A4FAA92-F248-11E8-B48F-1D18A9856A87"}],"tmp":{"legal_code_url":"https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode","short":"CC BY-NC-SA (4.0)","image":"/images/cc_by_nc_sa.png","name":"Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)"},"has_accepted_license":"1","publication_status":"published","status":"public","publisher":"Institute of Science and Technology Austria","date_updated":"2026-04-07T12:42:28Z","day":"11","year":"2024","file":[{"file_id":"17228","file_name":"PhD_Thesis_Vyacheslav_Li_no_signatures_PDFA.pdf","success":1,"access_level":"open_access","date_created":"2024-07-11T10:26:22Z","relation":"main_file","checksum":"15b2dbe8d2c9ed7ca5dd413827928077","file_size":6729761,"content_type":"application/pdf","date_updated":"2024-07-11T10:26:22Z","creator":"vli"},{"date_updated":"2024-07-11T10:26:22Z","content_type":"application/x-zip-compressed","file_size":9542859,"creator":"vli","access_level":"closed","relation":"source_file","checksum":"16e904a11d8d0ebb167cb654ddfc7fe5","date_created":"2024-07-11T10:26:22Z","file_id":"17229","file_name":"PhD Thesis Vyacheslav Li.zip"}]}]