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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/8100
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dc.contributor.authorBhattacharjee, Suraka-
dc.contributor.authorMandal, Koushik-
dc.contributor.authorSinha, Supurna-
dc.date.accessioned2023-05-22T05:45:21Z-
dc.date.available2023-05-22T05:45:21Z-
dc.date.issued2023-05-19-
dc.identifier.citationJournal of Physics A : Mathematical and Theoretical, 2023, Vol. 56,p245301en_US
dc.identifier.issn1751-8113-
dc.identifier.issn1751-8121 (Online)-
dc.identifier.urihttp://hdl.handle.net/2289/8100-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en_US
dc.description.abstractWe derive a non-Markovian master equation for a charged particle in a magnetic field coupled to a bath and study decoherence by analyzing the temporal decay of the off-diagonal elements of the reduced density matrix in the position basis. The coherent oscillations characterized by the cyclotron frequency get suppressed as a result of decoherence due to coupling with the environment. We consider an Ohmic bath with three distinct models for the high-frequency cutoff for the spectral density of the bath and compare the three cases. As expected, the three cutoff models converge in the limit of the uppermost frequency of the bath tending to infinity. We notice a dramatic slowing down of loss of coherence in the low-temperature limit dominated by zero point quantum fluctuations compared to the high-temperature classical limit dominated by thermal fluctuations. We also go beyond the Ohmic model and study super-Ohmic and sub-Ohmic baths with the spectral densities deviating from a linear dependence on the frequency. Our results are testable in a state of the art cold atom laboratory.en_US
dc.language.isoenen_US
dc.publisherIOP Publishing Ltden_US
dc.relation.urihttps://arxiv.org/abs/2301.06365en_US
dc.relation.urihttps://doi.org/10.1088/1751-8121/acd231en_US
dc.relation.urihttps://ui.adsabs.harvard.edu/abs/2023arXiv230106365B/abstracten_US
dc.rights2023 IOP Publishing Ltden_US
dc.titleDecoherence and the ultraviolet cutoff: non-Markovian dissipative dynamics of a charged particle in a magnetic fielden_US
dc.typeArticleen_US
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