--- DOAJ_listed: '1' OA_place: publisher OA_type: gold PlanS_conform: '1' _id: '20840' abstract: - lang: eng 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. 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). article_number: '80' article_processing_charge: Yes article_type: original arxiv: 1 author: - first_name: Sofya full_name: Agafonova, Sofya id: 09501ff6-dca7-11ea-a8ae-b3e0b9166e80 last_name: Agafonova orcid: 0000-0003-0582-2946 - first_name: Pere full_name: Rosello, Pere last_name: Rosello - first_name: Manuel full_name: Mekonnen, Manuel last_name: Mekonnen - first_name: Onur full_name: Hosten, Onur id: 4C02D85E-F248-11E8-B48F-1D18A9856A87 last_name: Hosten orcid: 0000-0002-2031-204X citation: ama: Agafonova S, Rosello P, Mekonnen M, Hosten O. One-milligram torsional pendulum toward experiments at the quantum-gravity interface. Communications Physics. 2026;9. doi:10.1038/s42005-026-02514-w apa: Agafonova, S., Rosello, P., Mekonnen, M., & Hosten, O. (2026). One-milligram torsional pendulum toward experiments at the quantum-gravity interface. Communications Physics. Springer Nature. https://doi.org/10.1038/s42005-026-02514-w chicago: Agafonova, Sofia, Pere Rosello, Manuel Mekonnen, and Onur Hosten. “One-Milligram Torsional Pendulum toward Experiments at the Quantum-Gravity Interface.” Communications Physics. Springer Nature, 2026. https://doi.org/10.1038/s42005-026-02514-w. ieee: S. Agafonova, P. Rosello, M. Mekonnen, and O. Hosten, “One-milligram torsional pendulum toward experiments at the quantum-gravity interface,” Communications Physics, vol. 9. Springer Nature, 2026. 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. mla: Agafonova, Sofia, et al. “One-Milligram Torsional Pendulum toward Experiments at the Quantum-Gravity Interface.” Communications Physics, vol. 9, 80, Springer Nature, 2026, doi:10.1038/s42005-026-02514-w. short: S. Agafonova, P. Rosello, M. Mekonnen, O. Hosten, Communications Physics 9 (2026). corr_author: '1' date_created: 2025-12-21T11:39:04Z date_published: 2026-03-04T00:00:00Z date_updated: 2026-03-16T10:09:22Z day: '04' ddc: - '530' department: - _id: GradSch - _id: OnHo doi: 10.1038/s42005-026-02514-w external_id: arxiv: - '2408.09445' file: - access_level: open_access checksum: 62e2175e7e3ad49260ae6a7b4e0860a2 content_type: application/pdf creator: dernst date_created: 2026-03-16T10:07:46Z date_updated: 2026-03-16T10:07:46Z file_id: '21457' file_name: 2026_CommunicationsPhysics_Agafonova.pdf file_size: 1901772 relation: main_file success: 1 file_date_updated: 2026-03-16T10:07:46Z has_accepted_license: '1' intvolume: ' 9' language: - iso: eng month: '03' oa: 1 oa_version: Published Version project: - _id: bdb2a702-d553-11ed-ba76-f12e3e5a3bc6 grant_number: '101087907' name: 'A quantum hybrid of atoms and milligram-scale pendulums: towards gravitational quantum mechanics' publication: Communications Physics publication_identifier: eissn: - 2399-3650 publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: record: - id: '20842' relation: research_data status: public scopus_import: '1' status: public title: One-milligram torsional pendulum toward experiments at the quantum-gravity interface tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 9 year: '2026' ... --- DOAJ_listed: '1' OA_place: publisher OA_type: gold _id: '21550' abstract: - lang: eng text: Optical computing often employs tailor-made hardware to implement specific algorithms, trading generality for improved performance in key aspects like speed and power efficiency. An important computing approach that is still missing its corresponding optical hardware is probabilistic computing, used e.g. for solving difficult combinatorial optimization problems. In this study, we propose an experimentally viable photonic approach to solve arbitrary probabilistic computing problems. Our method relies on the insight that coherent Ising machines composed of coupled and biased optical parametric oscillators can emulate stochastic logic. We demonstrate the feasibility of our approach by using numerical simulations equivalent to the full density matrix formulation of coupled optical parametric oscillators. article_number: '31' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Michael full_name: Horodynski, Michael last_name: Horodynski - first_name: Charles full_name: Roques-Carmes, Charles id: e2e68fc9-6505-11ef-a541-eb4e72cc3e82 last_name: Roques-Carmes - first_name: Yannick full_name: Salamin, Yannick last_name: Salamin - first_name: Seou full_name: Choi, Seou last_name: Choi - first_name: Jamison full_name: Sloan, Jamison last_name: Sloan - first_name: Di full_name: Luo, Di last_name: Luo - first_name: Marin full_name: Soljačić, Marin last_name: Soljačić citation: ama: Horodynski M, Roques-Carmes C, Salamin Y, et al. Stochastic logic in biased coupled photonic probabilistic bits. Communications Physics. 2025;8. doi:10.1038/s42005-025-01953-1 apa: Horodynski, M., Roques-Carmes, C., Salamin, Y., Choi, S., Sloan, J., Luo, D., & Soljačić, M. (2025). Stochastic logic in biased coupled photonic probabilistic bits. Communications Physics. Springer Nature. https://doi.org/10.1038/s42005-025-01953-1 chicago: Horodynski, Michael, Charles Roques-Carmes, Yannick Salamin, Seou Choi, Jamison Sloan, Di Luo, and Marin Soljačić. “Stochastic Logic in Biased Coupled Photonic Probabilistic Bits.” Communications Physics. Springer Nature, 2025. https://doi.org/10.1038/s42005-025-01953-1. ieee: M. Horodynski et al., “Stochastic logic in biased coupled photonic probabilistic bits,” Communications Physics, vol. 8. Springer Nature, 2025. ista: Horodynski M, Roques-Carmes C, Salamin Y, Choi S, Sloan J, Luo D, Soljačić M. 2025. Stochastic logic in biased coupled photonic probabilistic bits. Communications Physics. 8, 31. mla: Horodynski, Michael, et al. “Stochastic Logic in Biased Coupled Photonic Probabilistic Bits.” Communications Physics, vol. 8, 31, Springer Nature, 2025, doi:10.1038/s42005-025-01953-1. short: M. Horodynski, C. Roques-Carmes, Y. Salamin, S. Choi, J. Sloan, D. Luo, M. Soljačić, Communications Physics 8 (2025). date_created: 2026-03-30T12:22:47Z date_published: 2025-02-20T00:00:00Z date_updated: 2026-04-27T08:43:22Z day: '20' ddc: - '530' doi: 10.1038/s42005-025-01953-1 extern: '1' external_id: arxiv: - '2406.04000' intvolume: ' 8' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1038/s42005-025-01953-1 month: '02' oa: 1 oa_version: Published Version publication: Communications Physics publication_identifier: eissn: - 2399-3650 publication_status: published publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Stochastic logic in biased coupled photonic probabilistic bits tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd volume: 8 year: '2025' ... --- _id: '10401' abstract: - lang: eng text: Theoretical and experimental studies of the interaction between spins and temperature are vital for the development of spin caloritronics, as they dictate the design of future devices. In this work, we propose a two-terminal cold-atom simulator to study that interaction. The proposed quantum simulator consists of strongly interacting atoms that occupy two temperature reservoirs connected by a one-dimensional link. First, we argue that the dynamics in the link can be described using an inhomogeneous Heisenberg spin chain whose couplings are defined by the local temperature. Second, we show the existence of a spin current in a system with a temperature difference by studying the dynamics that follows the spin-flip of an atom in the link. A temperature gradient accelerates the impurity in one direction more than in the other, leading to an overall spin current similar to the spin Seebeck effect. acknowledgement: The authors acknowledge support from the European QuantERA ERA-NET Cofund in Quantum Technologies (Project QTFLAG Grant Agreement No. 731473) (R.E.B), CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico) Brazil (A.F.), the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 754411 (A.G.V.), the Independent Research Fund Denmark, the Carlsberg Foundation, and Aarhus University Research Foundation under the Jens Christian Skou fellowship program (N.T.Z). article_number: '252' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Rafael E. full_name: Barfknecht, Rafael E. last_name: Barfknecht - first_name: Angela full_name: Foerster, Angela last_name: Foerster - first_name: Nikolaj T. full_name: Zinner, Nikolaj T. last_name: Zinner - first_name: Artem full_name: Volosniev, Artem id: 37D278BC-F248-11E8-B48F-1D18A9856A87 last_name: Volosniev orcid: 0000-0003-0393-5525 citation: ama: Barfknecht RE, Foerster A, Zinner NT, Volosniev A. Generation of spin currents by a temperature gradient in a two-terminal device. Communications Physics. 2021;4(1). doi:10.1038/s42005-021-00753-7 apa: Barfknecht, R. E., Foerster, A., Zinner, N. T., & Volosniev, A. (2021). Generation of spin currents by a temperature gradient in a two-terminal device. Communications Physics. Springer Nature. https://doi.org/10.1038/s42005-021-00753-7 chicago: Barfknecht, Rafael E., Angela Foerster, Nikolaj T. Zinner, and Artem Volosniev. “Generation of Spin Currents by a Temperature Gradient in a Two-Terminal Device.” Communications Physics. Springer Nature, 2021. https://doi.org/10.1038/s42005-021-00753-7. ieee: R. E. Barfknecht, A. Foerster, N. T. Zinner, and A. Volosniev, “Generation of spin currents by a temperature gradient in a two-terminal device,” Communications Physics, vol. 4, no. 1. Springer Nature, 2021. ista: Barfknecht RE, Foerster A, Zinner NT, Volosniev A. 2021. Generation of spin currents by a temperature gradient in a two-terminal device. Communications Physics. 4(1), 252. mla: Barfknecht, Rafael E., et al. “Generation of Spin Currents by a Temperature Gradient in a Two-Terminal Device.” Communications Physics, vol. 4, no. 1, 252, Springer Nature, 2021, doi:10.1038/s42005-021-00753-7. short: R.E. Barfknecht, A. Foerster, N.T. Zinner, A. Volosniev, Communications Physics 4 (2021). date_created: 2021-12-05T23:01:39Z date_published: 2021-11-26T00:00:00Z date_updated: 2026-04-02T14:05:00Z day: '26' ddc: - '530' department: - _id: MiLe doi: 10.1038/s42005-021-00753-7 ec_funded: 1 external_id: arxiv: - '2101.02020' isi: - '000722867600002' file: - access_level: open_access checksum: 9097319952cb9a3d96e7fd3aa9813a03 content_type: application/pdf creator: alisjak date_created: 2021-12-06T14:53:41Z date_updated: 2021-12-06T14:53:41Z file_id: '10420' file_name: 2021_NatComm_Barfknecht.pdf file_size: 1068984 relation: main_file success: 1 file_date_updated: 2021-12-06T14:53:41Z has_accepted_license: '1' intvolume: ' 4' isi: 1 issue: '1' language: - iso: eng month: '11' oa: 1 oa_version: Published Version project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: Communications Physics publication_identifier: eissn: - 2399-3650 publication_status: published publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Generation of spin currents by a temperature gradient in a two-terminal device tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd volume: 4 year: '2021' ... --- _id: '8036' abstract: - lang: eng text: When tiny soft ferromagnetic particles are placed along a liquid interface and exposed to a vertical magnetic field, the balance between capillary attraction and magnetic repulsion leads to self-organization into well-defined patterns. Here, we demonstrate experimentally that precessing magnetic fields induce metachronal waves on the periphery of these assemblies, similar to the ones observed in ciliates and some arthropods. The outermost layer of particles behaves like an array of cilia or legs whose sequential movement causes a net and controllable locomotion. This bioinspired many-particle swimming strategy is effective even at low Reynolds number, using only spatially uniform fields to generate the waves. article_number: '112' article_processing_charge: No article_type: original author: - first_name: Ylona full_name: Collard, Ylona last_name: Collard - first_name: Galien M full_name: Grosjean, Galien M id: 0C5FDA4A-9CF6-11E9-8939-FF05E6697425 last_name: Grosjean orcid: 0000-0001-5154-417X - first_name: Nicolas full_name: Vandewalle, Nicolas last_name: Vandewalle citation: ama: Collard Y, Grosjean GM, Vandewalle N. Magnetically powered metachronal waves induce locomotion in self-assemblies. Communications Physics. 2020;3. doi:10.1038/s42005-020-0380-9 apa: Collard, Y., Grosjean, G. M., & Vandewalle, N. (2020). Magnetically powered metachronal waves induce locomotion in self-assemblies. Communications Physics. Springer Nature. https://doi.org/10.1038/s42005-020-0380-9 chicago: Collard, Ylona, Galien M Grosjean, and Nicolas Vandewalle. “Magnetically Powered Metachronal Waves Induce Locomotion in Self-Assemblies.” Communications Physics. Springer Nature, 2020. https://doi.org/10.1038/s42005-020-0380-9. ieee: Y. Collard, G. M. Grosjean, and N. Vandewalle, “Magnetically powered metachronal waves induce locomotion in self-assemblies,” Communications Physics, vol. 3. Springer Nature, 2020. ista: Collard Y, Grosjean GM, Vandewalle N. 2020. Magnetically powered metachronal waves induce locomotion in self-assemblies. Communications Physics. 3, 112. mla: Collard, Ylona, et al. “Magnetically Powered Metachronal Waves Induce Locomotion in Self-Assemblies.” Communications Physics, vol. 3, 112, Springer Nature, 2020, doi:10.1038/s42005-020-0380-9. short: Y. Collard, G.M. Grosjean, N. Vandewalle, Communications Physics 3 (2020). date_created: 2020-06-29T07:59:35Z date_published: 2020-06-19T00:00:00Z date_updated: 2026-04-02T14:34:21Z day: '19' ddc: - '530' department: - _id: ScWa doi: 10.1038/s42005-020-0380-9 ec_funded: 1 external_id: isi: - '000543328000002' file: - access_level: open_access checksum: ed984f7a393f19140b5279a54a3336ad content_type: application/pdf creator: cziletti date_created: 2020-06-29T13:21:24Z date_updated: 2020-07-14T12:48:08Z file_id: '8045' file_name: 2020_CommunicationsPhysics_Collard.pdf file_size: 1907821 relation: main_file file_date_updated: 2020-07-14T12:48:08Z has_accepted_license: '1' intvolume: ' 3' isi: 1 language: - iso: eng month: '06' oa: 1 oa_version: Published Version project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: Communications Physics publication_identifier: eissn: - 2399-3650 publication_status: published publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Magnetically powered metachronal waves induce locomotion in self-assemblies tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd volume: 3 year: '2020' ...