Detecting quantum backflow by the density of a Bose-Einstein condensate

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Show simple item record Palmero, Mikel Torrontegui Muñoz, Erik Muga, Juan Gonzalo Modugno, Michelle 2021-03-15T11:22:44Z 2021-03-15T11:22:44Z 2013-05
dc.identifier.bibliographicCitation Palmero, M., Torrontegui, E., Muga, J. G. y Modugno, M. (2013). Detecting quantum backflow by the density of a Bose-Einstein condensate. Physical Review A, 87(5).
dc.identifier.issn 1050-2947
dc.description.abstract Quantum backflow is a classically forbidden effect consisting of a negative flux for states with negligible negative-momentum components. It has never been observed experimentally so far. We derive a general relation that connects backflow with a critical value of the particle density, paving the way for the detection of backflow by a density measurement. To this end, we propose an explicit scheme with Bose-Einstein condensates, at reach with current experimental technologies. Remarkably, the application of a positive-momentum kick, via a Bragg pulse, to a condensate with a positive velocity may cause a current flow in the negative direction.
dc.description.sponsorship M. M. is grateful to L. Fallani and C. Fort for useful discussions and valuable suggestions. We acknowledge funding by Grants No. FIS2012-36673-C03-01 and No. IT472-10 and by the UPV/EHU program UFI 11/55. M. P. and E. T. acknowledge support through fellowships by UPV/EHU.
dc.format.extent 5
dc.language.iso eng
dc.publisher American Physical Society
dc.rights ©2013 American Physical Society
dc.title Detecting quantum backflow by the density of a Bose-Einstein condensate
dc.type article
dc.subject.eciencia Física
dc.rights.accessRights openAccess
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 053618-1
dc.identifier.publicationissue 5
dc.identifier.publicationlastpage 053618-5
dc.identifier.publicationtitle Physical Review A
dc.identifier.publicationvolume 87
dc.identifier.uxxi AR/0000026562
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