Coupling function from bath density of states
dc.contributor.author | Nemati, S | |
dc.contributor.author | Henkel, C | |
dc.contributor.author | Anders, J | |
dc.date.accessioned | 2022-09-01T09:34:58Z | |
dc.date.issued | 2022-07-28 | |
dc.date.updated | 2022-08-31T22:11:32Z | |
dc.description.abstract | Modelling of an open quantum system requires knowledge of parameters that specify how it couples to its environment. However, beyond relaxation rates, realistic parameters for specific environments and materials are rarely known. Here we present a method of inferring the coupling between a generic system and its bosonic (e.g., phononic) environment from the experimentally measurable density of states (DOS). With it we confirm that the DOS of the well-known Debye model for three-dimensional solids is physically equivalent to choosing an Ohmic bath. We further match a real phonon DOS to a series of Lorentzian coupling functions, allowing us to determine coupling parameters for gold, yttrium iron garnet (YIG) and iron as examples. The results illustrate how to obtain material-specific dynamical properties, such as memory kernels. The proposed method opens the door to more accurate modelling of relaxation dynamics, for example for phonon-dominated spin damping in magnetic materials. | en_GB |
dc.description.sponsorship | University of Potsdam | en_GB |
dc.format.extent | 36002- | |
dc.identifier.citation | Vol. 139(3), article 36002 | en_GB |
dc.identifier.doi | https://doi.org/10.1209/0295-5075/ac7b42 | |
dc.identifier.uri | http://hdl.handle.net/10871/130632 | |
dc.identifier | ORCID: 0000-0002-9791-0363 (Anders, J) | |
dc.language.iso | en | en_GB |
dc.publisher | IOP Publishing | en_GB |
dc.rights | © 2022 The author(s). Open access. Published by the EPLA under the terms of the Creative Commons Attribution 4.0 International License (CC BY). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. | en_GB |
dc.title | Coupling function from bath density of states | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2022-09-01T09:34:58Z | |
dc.identifier.issn | 0295-5075 | |
dc.description | This is the final version. Available on open access from IOP Publishing via the DOI in this record | en_GB |
dc.identifier.eissn | 1286-4854 | |
dc.identifier.journal | Europhysics Letters | en_GB |
dc.relation.ispartof | EPL (Europhysics Letters), 139(3) | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2022-06-22 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2022-07-28 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2022-09-01T09:32:55Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2022-09-01T09:35:06Z | |
refterms.panel | B | en_GB |
refterms.dateFirstOnline | 2022-07-28 |
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Except where otherwise noted, this item's licence is described as © 2022 The author(s). Open access. Published by the EPLA under the terms of the Creative Commons Attribution 4.0 International License (CC BY). Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.