Journal article
Negative mass hydrodynamics in a Spin-Orbit--Coupled Bose-Einstein Condensate
Physical review letters, Vol.118(15), pp.155301-155301
12/13/2016
Handle:
https://hdl.handle.net/2376/112968
PMID: 28452531
Abstract
Phys. Rev. Lett. 118, 155301 (2017) A negative effective mass can be realized in quantum systems by engineering
the dispersion relation. A powerful method is provided by spin-orbit coupling,
which is currently at the center of intense research efforts. Here we measure
an expanding spin-orbit coupled Bose-Einstein condensate whose dispersion
features a region of negative effective mass. We observe a range of dynamical
phenomena, including the breaking of parity and of Galilean covariance,
dynamical instabilities, and self-trapping. The experimental findings are
reproduced by a single-band Gross-Pitaevskii simulation, demonstrating that the
emerging features - shockwaves, soliton trains, self-trapping, etc. - originate
from a modified dispersion. Our work also sheds new light on related phenomena
in optical lattices, where the underlying periodic structure often complicates
their interpretation.
Metrics
12 Record Views
Details
- Title
- Negative mass hydrodynamics in a Spin-Orbit--Coupled Bose-Einstein Condensate
- Creators
- M. A KhamehchiKhalid HossainM. E MossmanYongping ZhangTh BuschMichael McNeil ForbesP Engels
- Publication Details
- Physical review letters, Vol.118(15), pp.155301-155301
- Academic Unit
- Physics and Astronomy, Department of
- Identifiers
- 99900547959001842
- Language
- English
- Resource Type
- Journal article