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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6840
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dc.contributor.authorSatpathi, Urbashi-
dc.contributor.authorSinha, Supurna-
dc.contributor.authorSorkin, Rafael D.-
dc.date.accessioned2018-02-22T13:33:34Z-
dc.date.available2018-02-22T13:33:34Z-
dc.date.issued2017-12-28-
dc.identifier.citationJournal of Statistical Mechanics: Theory and Experiment, 2017, P123105en_US
dc.identifier.issn1742-5468-
dc.identifier.urihttp://hdl.handle.net/2289/6840-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en_US
dc.description.abstractWe analyse diffusion at low temperature by bringing the fluctuation-dissipation theorem (FDT) to bear on a physically natural, viscous response-function $R(t)$ . The resulting diffusion-law exhibits several distinct regimes of time and temperature, each with its own characteristic rate of spreading. As with earlier analyses, we find logarithmic spreading in the quantum regime, indicating that this behavior is robust. A consistent $R(t)$ must satisfy the key physical requirements of Wightman positivity and passivity, and we prove that ours does so. We also prove in general that these two conditions are equivalent when the FDT holds. Given current technology, our diffusion law can be tested in a laboratory with ultra cold atoms.en_US
dc.language.isoenen_US
dc.publisherIOP Publishing and SISSAen_US
dc.relation.urihttp://arxiv.org/abs/1702.06273en_US
dc.relation.urihttp://dx.doi.org/10.1088/1742-5468/aa9bb8en_US
dc.relation.urihttp://adsabs.harvard.edu/abs/2017JSMTE..12.3105Sen_US
dc.rights2017 IOP Publishing and SISSA Medialab srlen_US
dc.subjectBrownian motionen_US
dc.subjectcold atomsen_US
dc.subjectcorrelation functionsen_US
dc.titleA quantum diffusion lawen_US
dc.typeArticleen_US
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