Negative-mass effects in spin-orbit coupled Bose-Einstein condensates
dc.contributor.author | Colas, David | |
dc.contributor.author | Laussy, Fabrice P. | |
dc.contributor.author | Davis, Matthew J. | |
dc.date.accessioned | 2018-09-27T08:52:29Z | |
dc.date.available | 2018-09-27T08:52:29Z | |
dc.date.issued | 2018-07-31 | |
dc.identifier.issn | 0031-9007 | |
dc.identifier.issn | 1079-7114 | |
dc.identifier.doi | 10.1103/PhysRevLett.121.055302 | |
dc.identifier.uri | http://hdl.handle.net/2436/621719 | |
dc.description.abstract | Negative effective masses can be realized by engineering the dispersion relation of a variety of quantum systems. A recent experiment with spin-orbit coupled Bose-Einstein condensates has shown that a negative effective mass can halt the free expansion of the condensate and lead to fringes in the density [M. A. Khamehchi et al., Phys. Rev. Lett. 118, 155301 (2017)]. Here, we show that the underlying cause of these observations is the self-interference of the wave packet that arises when only one of the two effective mass parameters that characterize the dispersion of the system is negative. We show that spin-orbit coupled Bose-Einstein condensates may access regimes where both mass parameters controlling the propagation and diffusion of the condensate are negative, which leads to the novel phenomenon of counterpropagating self-interfering packets. | |
dc.description.sponsorship | EU project polaflow | |
dc.language.iso | en | |
dc.publisher | APS | |
dc.relation.url | https://link.aps.org/doi/10.1103/PhysRevLett.121.055302 | |
dc.subject | Polaritons | |
dc.subject | negative mass | |
dc.subject | kinematics | |
dc.subject | BEC | |
dc.subject | SOCBEC | |
dc.title | Negative-mass effects in spin-orbit coupled Bose-Einstein condensates | |
dc.type | Journal article | |
dc.identifier.journal | Physical Review Letters | |
dc.date.accepted | 2018-07-01 | |
dc.source.journaltitle | Physical Review Letters | |
dc.source.volume | 121 | |
dc.source.issue | 5 | |
refterms.dateFOA | 2019-03-08T14:42:48Z |