--- _id: '14845' abstract: - lang: eng text: We study a linear rotor in a bosonic bath within the angulon formalism. Our focus is on systems where isotropic or anisotropic impurity-boson interactions support a shallow bound state. To study the fate of the angulon in the vicinity of bound-state formation, we formulate a beyond-linear-coupling angulon Hamiltonian. First, we use it to study attractive, spherically symmetric impurity-boson interactions for which the linear rotor can be mapped onto a static impurity. The well-known polaron formalism provides an adequate description in this limit. Second, we consider anisotropic potentials, and show that the presence of a shallow bound state with pronounced anisotropic character leads to a many-body instability that washes out the angulon dynamics. acknowledgement: "We would like to thank G. Bighin, I. Cherepanov, E. Paerschke, and E. Yakaboylu for insightful discussions on a wide range of topics. This work has been supported by the European Research Council (ERC) Starting Grant No. 801770 (ANGULON). A.G. and A.G.V. acknowledge support from the European Union’s Horizon 2020 research and innovation\r\nprogram under the Marie Skłodowska-Curie Grant Agreement No. 754411. Numerical calculations were performed on the Euler cluster managed by the HPC team at ETH Zurich.\r\nR.S. acknowledges support by the Deutsche Forschungsgemeinschaft under Germany’s Excellence Strategy Grant No. EXC 2181/1-390900948 (the Heidelberg STRUCTURES Excellence Cluster). T.D. acknowledges support from the Isaac Newton Studentship and the Science and Technology Facilities Council under Grant No. ST/V50659X/1." article_number: '014102' article_processing_charge: No article_type: original author: - first_name: Tibor full_name: Dome, Tibor id: 7e3293e2-b9dc-11ee-97a9-cd73400f6994 last_name: Dome orcid: 0000-0003-2586-3702 - first_name: Artem full_name: Volosniev, Artem id: 37D278BC-F248-11E8-B48F-1D18A9856A87 last_name: Volosniev orcid: 0000-0003-0393-5525 - first_name: Areg full_name: Ghazaryan, Areg id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87 last_name: Ghazaryan orcid: 0000-0001-9666-3543 - first_name: Laleh full_name: Safari, Laleh id: 3C325E5E-F248-11E8-B48F-1D18A9856A87 last_name: Safari - first_name: Richard full_name: Schmidt, Richard last_name: Schmidt - first_name: Mikhail full_name: Lemeshko, Mikhail id: 37CB05FA-F248-11E8-B48F-1D18A9856A87 last_name: Lemeshko orcid: 0000-0002-6990-7802 citation: ama: Dome T, Volosniev A, Ghazaryan A, Safari L, Schmidt R, Lemeshko M. Linear rotor in an ideal Bose gas near the threshold for binding. Physical Review B. 2024;109(1). doi:10.1103/PhysRevB.109.014102 apa: Dome, T., Volosniev, A., Ghazaryan, A., Safari, L., Schmidt, R., & Lemeshko, M. (2024). Linear rotor in an ideal Bose gas near the threshold for binding. Physical Review B. American Physical Society. https://doi.org/10.1103/PhysRevB.109.014102 chicago: Dome, Tibor, Artem Volosniev, Areg Ghazaryan, Laleh Safari, Richard Schmidt, and Mikhail Lemeshko. “Linear Rotor in an Ideal Bose Gas near the Threshold for Binding.” Physical Review B. American Physical Society, 2024. https://doi.org/10.1103/PhysRevB.109.014102. ieee: T. Dome, A. Volosniev, A. Ghazaryan, L. Safari, R. Schmidt, and M. Lemeshko, “Linear rotor in an ideal Bose gas near the threshold for binding,” Physical Review B, vol. 109, no. 1. American Physical Society, 2024. ista: Dome T, Volosniev A, Ghazaryan A, Safari L, Schmidt R, Lemeshko M. 2024. Linear rotor in an ideal Bose gas near the threshold for binding. Physical Review B. 109(1), 014102. mla: Dome, Tibor, et al. “Linear Rotor in an Ideal Bose Gas near the Threshold for Binding.” Physical Review B, vol. 109, no. 1, 014102, American Physical Society, 2024, doi:10.1103/PhysRevB.109.014102. short: T. Dome, A. Volosniev, A. Ghazaryan, L. Safari, R. Schmidt, M. Lemeshko, Physical Review B 109 (2024). date_created: 2024-01-21T23:00:57Z date_published: 2024-01-01T00:00:00Z date_updated: 2024-01-23T10:51:09Z day: '01' department: - _id: MiLe doi: 10.1103/PhysRevB.109.014102 ec_funded: 1 intvolume: ' 109' issue: '1' language: - iso: eng month: '01' oa_version: None project: - _id: 2688CF98-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '801770' name: 'Angulon: physics and applications of a new quasiparticle' - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: Physical Review B publication_identifier: eissn: - 2469-9969 issn: - 2469-9950 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Linear rotor in an ideal Bose gas near the threshold for binding type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 109 year: '2024' ... --- _id: '14851' abstract: - lang: ger text: Die Quantenrotation ist ein spannendes Phänomen, das in vielen verschiedenen Systemen auftritt, von Molekülen und Atomen bis hin zu subatomaren Teilchen wie Neutronen und Protonen. Durch den Einsatz von starken Laserpulsen ist es möglich, die mathematisch anspruchsvolle Topologie der Rotation von Molekülen aufzudecken und topologisch geschützte Zustände zu erzeugen, die unerwartetes Verhalten zeigen. Diese Entdeckungen könnten Auswirkungen auf die Molekülphysik und physikalische Chemie haben und die Entwicklung neuer Technologien ermöglichen. Die Verbindung von Quantenrotation und Topologie stellt ein aufregendes, interdisziplinäres Forschungsfeld dar und bietet neue Wege zur Kontrolle und Nutzung von quantenmechanischen Phänomenen. article_processing_charge: Yes (via OA deal) article_type: original author: - first_name: Volker full_name: Karle, Volker id: D7C012AE-D7ED-11E9-95E8-1EC5E5697425 last_name: Karle orcid: 0000-0002-6963-0129 - first_name: Mikhail full_name: Lemeshko, Mikhail id: 37CB05FA-F248-11E8-B48F-1D18A9856A87 last_name: Lemeshko orcid: 0000-0002-6990-7802 citation: ama: Karle V, Lemeshko M. Die faszinierende Topologie rotierender Quanten. Physik in unserer Zeit. 2024;55(1):28-33. doi:10.1002/piuz.202301690 apa: Karle, V., & Lemeshko, M. (2024). Die faszinierende Topologie rotierender Quanten. Physik in unserer Zeit. Wiley. https://doi.org/10.1002/piuz.202301690 chicago: Karle, Volker, and Mikhail Lemeshko. “Die faszinierende Topologie rotierender Quanten.” Physik in unserer Zeit. Wiley, 2024. https://doi.org/10.1002/piuz.202301690. ieee: V. Karle and M. Lemeshko, “Die faszinierende Topologie rotierender Quanten,” Physik in unserer Zeit, vol. 55, no. 1. Wiley, pp. 28–33, 2024. ista: Karle V, Lemeshko M. 2024. Die faszinierende Topologie rotierender Quanten. Physik in unserer Zeit. 55(1), 28–33. mla: Karle, Volker, and Mikhail Lemeshko. “Die faszinierende Topologie rotierender Quanten.” Physik in unserer Zeit, vol. 55, no. 1, Wiley, 2024, pp. 28–33, doi:10.1002/piuz.202301690. short: V. Karle, M. Lemeshko, Physik in unserer Zeit 55 (2024) 28–33. date_created: 2024-01-22T08:19:36Z date_published: 2024-01-01T00:00:00Z date_updated: 2024-02-15T14:29:04Z day: '01' ddc: - '530' department: - _id: MiLe doi: 10.1002/piuz.202301690 file: - access_level: open_access checksum: 3051dadcf9bc57da97e36b647c596ab1 content_type: application/pdf creator: dernst date_created: 2024-01-23T12:18:07Z date_updated: 2024-01-23T12:18:07Z file_id: '14878' file_name: 2024_PhysikZeit_Karle.pdf file_size: 1155244 relation: main_file success: 1 file_date_updated: 2024-01-23T12:18:07Z has_accepted_license: '1' intvolume: ' 55' issue: '1' keyword: - General Earth and Planetary Sciences - General Environmental Science language: - iso: ger month: '01' oa: 1 oa_version: Published Version page: 28-33 publication: Physik in unserer Zeit publication_identifier: eissn: - 1521-3943 issn: - 0031-9252 publication_status: published publisher: Wiley quality_controlled: '1' status: public title: Die faszinierende Topologie rotierender Quanten 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: 3E5EF7F0-F248-11E8-B48F-1D18A9856A87 volume: 55 year: '2024' ... --- _id: '15004' abstract: - lang: eng text: The impulsive limit (the “sudden approximation”) has been widely employed to describe the interaction between molecules and short, far-off-resonant laser pulses. This approximation assumes that the timescale of the laser-molecule interaction is significantly shorter than the internal rotational period of the molecule, resulting in the rotational motion being instantaneously “frozen” during the interaction. This simplified description of the laser-molecule interaction is incorporated in various theoretical models predicting rotational dynamics of molecules driven by short laser pulses. In this theoretical work, we develop an effective theory for ultrashort laser pulses by examining the full time-evolution operator and solving the time-dependent Schrödinger equation at the operator level. Our findings reveal a critical angular momentum, lcrit, at which the impulsive limit breaks down. In other words, the validity of the sudden approximation depends not only on the pulse duration but also on its intensity, since the latter determines how many angular momentum states are populated. We explore both ultrashort multicycle (Gaussian) pulses and the somewhat less studied half-cycle pulses, which produce distinct effective potentials. We discuss the limitations of the impulsive limit and propose a method that rescales the effective matrix elements, enabling an improved and more accurate description of laser-molecule interactions. acknowledgement: We thank Bretislav Friedrich, Marjan Mirahmadi, Artem Volosniev, and Burkhard Schmidt for insightful discussions. M.L. acknowledges support by the European Research Council (ERC) under Starting Grant No. 801770 (ANGULON). article_number: '023101' article_processing_charge: No article_type: original author: - first_name: Volker full_name: Karle, Volker id: D7C012AE-D7ED-11E9-95E8-1EC5E5697425 last_name: Karle orcid: 0000-0002-6963-0129 - first_name: Mikhail full_name: Lemeshko, Mikhail id: 37CB05FA-F248-11E8-B48F-1D18A9856A87 last_name: Lemeshko orcid: 0000-0002-6990-7802 citation: ama: 'Karle V, Lemeshko M. Modeling laser pulses as δ kicks: Reevaluating the impulsive limit in molecular rotational dynamics. Physical Review A. 2024;109(2). doi:10.1103/PhysRevA.109.023101' apa: 'Karle, V., & Lemeshko, M. (2024). Modeling laser pulses as δ kicks: Reevaluating the impulsive limit in molecular rotational dynamics. Physical Review A. American Physical Society. https://doi.org/10.1103/PhysRevA.109.023101' chicago: 'Karle, Volker, and Mikhail Lemeshko. “Modeling Laser Pulses as δ Kicks: Reevaluating the Impulsive Limit in Molecular Rotational Dynamics.” Physical Review A. American Physical Society, 2024. https://doi.org/10.1103/PhysRevA.109.023101.' ieee: 'V. Karle and M. Lemeshko, “Modeling laser pulses as δ kicks: Reevaluating the impulsive limit in molecular rotational dynamics,” Physical Review A, vol. 109, no. 2. American Physical Society, 2024.' ista: 'Karle V, Lemeshko M. 2024. Modeling laser pulses as δ kicks: Reevaluating the impulsive limit in molecular rotational dynamics. Physical Review A. 109(2), 023101.' mla: 'Karle, Volker, and Mikhail Lemeshko. “Modeling Laser Pulses as δ Kicks: Reevaluating the Impulsive Limit in Molecular Rotational Dynamics.” Physical Review A, vol. 109, no. 2, 023101, American Physical Society, 2024, doi:10.1103/PhysRevA.109.023101.' short: V. Karle, M. Lemeshko, Physical Review A 109 (2024). date_created: 2024-02-18T23:01:01Z date_published: 2024-02-01T00:00:00Z date_updated: 2024-02-26T09:45:20Z day: '01' department: - _id: MiLe doi: 10.1103/PhysRevA.109.023101 ec_funded: 1 external_id: arxiv: - '2307.07256' intvolume: ' 109' issue: '2' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2307.07256 month: '02' oa: 1 oa_version: Preprint project: - _id: 2688CF98-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '801770' name: 'Angulon: physics and applications of a new quasiparticle' publication: Physical Review A publication_identifier: eissn: - 2469-9934 issn: - 2469-9926 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: 'Modeling laser pulses as δ kicks: Reevaluating the impulsive limit in molecular rotational dynamics' type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 109 year: '2024' ... --- _id: '15045' abstract: - lang: eng text: Coupling of orbital motion to a spin degree of freedom gives rise to various transport phenomena in quantum systems that are beyond the standard paradigms of classical physics. Here, we discuss features of spin-orbit dynamics that can be visualized using a classical model with two coupled angular degrees of freedom. Specifically, we demonstrate classical ‘spin’ filtering through our model and show that the interplay between angular degrees of freedom and dissipation can lead to asymmetric ‘spin’ transport. acknowledgement: "We thank Mikhail Lemeshko and members of his group for many inspiring discussions; Alberto Cappellaro for comments on the manuscript.\r\nOpen access funding provided by Institute of Science and Technology (IST Austria)." article_number: '12' article_processing_charge: Yes (via OA deal) article_type: original author: - first_name: Atul full_name: Varshney, Atul id: 2A2006B2-F248-11E8-B48F-1D18A9856A87 last_name: Varshney orcid: 0000-0002-3072-5999 - first_name: Areg full_name: Ghazaryan, Areg id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87 last_name: Ghazaryan orcid: 0000-0001-9666-3543 - first_name: Artem full_name: Volosniev, Artem id: 37D278BC-F248-11E8-B48F-1D18A9856A87 last_name: Volosniev orcid: 0000-0003-0393-5525 citation: ama: Varshney A, Ghazaryan A, Volosniev A. Classical ‘spin’ filtering with two degrees of freedom and dissipation. Few-Body Systems. 2024;65. doi:10.1007/s00601-024-01880-x apa: Varshney, A., Ghazaryan, A., & Volosniev, A. (2024). Classical ‘spin’ filtering with two degrees of freedom and dissipation. Few-Body Systems. Springer Nature. https://doi.org/10.1007/s00601-024-01880-x chicago: Varshney, Atul, Areg Ghazaryan, and Artem Volosniev. “Classical ‘Spin’ Filtering with Two Degrees of Freedom and Dissipation.” Few-Body Systems. Springer Nature, 2024. https://doi.org/10.1007/s00601-024-01880-x. ieee: A. Varshney, A. Ghazaryan, and A. Volosniev, “Classical ‘spin’ filtering with two degrees of freedom and dissipation,” Few-Body Systems, vol. 65. Springer Nature, 2024. ista: Varshney A, Ghazaryan A, Volosniev A. 2024. Classical ‘spin’ filtering with two degrees of freedom and dissipation. Few-Body Systems. 65, 12. mla: Varshney, Atul, et al. “Classical ‘Spin’ Filtering with Two Degrees of Freedom and Dissipation.” Few-Body Systems, vol. 65, 12, Springer Nature, 2024, doi:10.1007/s00601-024-01880-x. short: A. Varshney, A. Ghazaryan, A. Volosniev, Few-Body Systems 65 (2024). date_created: 2024-03-01T11:39:33Z date_published: 2024-02-17T00:00:00Z date_updated: 2024-03-04T07:08:16Z day: '17' ddc: - '530' department: - _id: MiLe doi: 10.1007/s00601-024-01880-x external_id: arxiv: - '2401.08454' file: - access_level: open_access checksum: c4e08cc7bc756da69b1b36fda7bb92fb content_type: application/pdf creator: dernst date_created: 2024-03-04T07:07:10Z date_updated: 2024-03-04T07:07:10Z file_id: '15049' file_name: 2024_FewBodySys_Varshney.pdf file_size: 436712 relation: main_file success: 1 file_date_updated: 2024-03-04T07:07:10Z has_accepted_license: '1' intvolume: ' 65' keyword: - Atomic and Molecular Physics - and Optics language: - iso: eng month: '02' oa: 1 oa_version: Published Version publication: Few-Body Systems publication_identifier: issn: - 1432-5411 publication_status: published publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Classical ‘spin’ filtering with two degrees of freedom and dissipation 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: 65 year: '2024' ... --- _id: '15053' abstract: - lang: eng text: Atom-based quantum simulators have had many successes in tackling challenging quantum many-body problems, owing to the precise and dynamical control that they provide over the systems' parameters. They are, however, often optimized to address a specific type of problem. Here, we present the design and implementation of a 6Li-based quantum gas platform that provides wide-ranging capabilities and is able to address a variety of quantum many-body problems. Our two-chamber architecture relies on a robust combination of gray molasses and optical transport from a laser-cooling chamber to a glass cell with excellent optical access. There, we first create unitary Fermi superfluids in a three-dimensional axially symmetric harmonic trap and characterize them using in situ thermometry, reaching temperatures below 20 nK. This allows us to enter the deep superfluid regime with samples of extreme diluteness, where the interparticle spacing is sufficiently large for direct single-atom imaging. Second, we generate optical lattice potentials with triangular and honeycomb geometry in which we study diffraction of molecular Bose-Einstein condensates, and show how going beyond the Kapitza-Dirac regime allows us to unambiguously distinguish between the two geometries. With the ability to probe quantum many-body physics in both discrete and continuous space, and its suitability for bulk and single-atom imaging, our setup represents an important step towards achieving a wide-scope quantum simulator. acknowledgement: We thank Clara Bachorz, Darby Bates, Markus Bohlen, Valentin Crépel, Yann Kiefer, Joanna Lis, Mihail Rabinovic, and Julian Struck for experimental assistance in the early stages of this project, and Sebastian Will for a critical reading of the manuscript. This work has been supported by Agence Nationale de la Recherche (Grant No. ANR-21-CE30-0021), the European Research Council (Grant No. ERC-2016-ADG-743159), CNRS (Tremplin@INP 2020), and Région Ile-de-France in the framework of DIM SIRTEQ (Super2D and SISCo) and DIM QuanTiP. article_number: '013158' article_processing_charge: Yes article_type: original author: - first_name: Shuwei full_name: Jin, Shuwei last_name: Jin - first_name: Kunlun full_name: Dai, Kunlun last_name: Dai - first_name: Joris full_name: Verstraten, Joris last_name: Verstraten - first_name: Maxime full_name: Dixmerias, Maxime last_name: Dixmerias - first_name: Ragheed full_name: Al Hyder, Ragheed id: d1c405be-ae15-11ed-8510-ccf53278162e last_name: Al Hyder - first_name: Christophe full_name: Salomon, Christophe last_name: Salomon - first_name: Bruno full_name: Peaudecerf, Bruno last_name: Peaudecerf - first_name: Tim full_name: de Jongh, Tim last_name: de Jongh - first_name: Tarik full_name: Yefsah, Tarik last_name: Yefsah citation: ama: Jin S, Dai K, Verstraten J, et al. Multipurpose platform for analog quantum simulation. Physical Review Research. 2024;6(1). doi:10.1103/physrevresearch.6.013158 apa: Jin, S., Dai, K., Verstraten, J., Dixmerias, M., Al Hyder, R., Salomon, C., … Yefsah, T. (2024). Multipurpose platform for analog quantum simulation. Physical Review Research. American Physical Society. https://doi.org/10.1103/physrevresearch.6.013158 chicago: Jin, Shuwei, Kunlun Dai, Joris Verstraten, Maxime Dixmerias, Ragheed Al Hyder, Christophe Salomon, Bruno Peaudecerf, Tim de Jongh, and Tarik Yefsah. “Multipurpose Platform for Analog Quantum Simulation.” Physical Review Research. American Physical Society, 2024. https://doi.org/10.1103/physrevresearch.6.013158. ieee: S. Jin et al., “Multipurpose platform for analog quantum simulation,” Physical Review Research, vol. 6, no. 1. American Physical Society, 2024. ista: Jin S, Dai K, Verstraten J, Dixmerias M, Al Hyder R, Salomon C, Peaudecerf B, de Jongh T, Yefsah T. 2024. Multipurpose platform for analog quantum simulation. Physical Review Research. 6(1), 013158. mla: Jin, Shuwei, et al. “Multipurpose Platform for Analog Quantum Simulation.” Physical Review Research, vol. 6, no. 1, 013158, American Physical Society, 2024, doi:10.1103/physrevresearch.6.013158. short: S. Jin, K. Dai, J. Verstraten, M. Dixmerias, R. Al Hyder, C. Salomon, B. Peaudecerf, T. de Jongh, T. Yefsah, Physical Review Research 6 (2024). date_created: 2024-03-04T07:42:52Z date_published: 2024-02-13T00:00:00Z date_updated: 2024-03-04T07:55:29Z day: '13' ddc: - '530' department: - _id: MiLe doi: 10.1103/physrevresearch.6.013158 external_id: arxiv: - '2304.08433' file: - access_level: open_access checksum: ba2ae3e3a011f8897d3803c9366a67e2 content_type: application/pdf creator: dernst date_created: 2024-03-04T07:53:08Z date_updated: 2024-03-04T07:53:08Z file_id: '15054' file_name: 2024_PhysicalReviewResearch_Jin.pdf file_size: 4025988 relation: main_file success: 1 file_date_updated: 2024-03-04T07:53:08Z has_accepted_license: '1' intvolume: ' 6' issue: '1' keyword: - General Physics and Astronomy language: - iso: eng month: '02' oa: 1 oa_version: Published Version publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society quality_controlled: '1' scopus_import: '1' status: public title: Multipurpose platform for analog quantum simulation 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: 6 year: '2024' ...