Effects of berry curvature on the collective modes of ultracold gases

Hannah M Price, Nigel R. Cooper

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Topological energy bands have important geometrical properties described by the Berry curvature. We show that the Berry curvature changes the hydrodynamic equations of motion for a trapped Bose-Einstein condensate, and causes significant modifications to the collective mode frequencies. We illustrate our results for the case of two-dimensional Rashba spin-orbit coupling in a Zeeman field. Using an operator approach, we derive the effects of Berry curvature on the dipole mode in very general settings. We show that the sizes of these effects can be large and readily detected in experiment. Collective modes therefore provide a sensitive way to measure geometrical properties of energy bands.

Original languageEnglish
Article number220407
JournalPhysical Review Letters
Volume111
Issue number22
DOIs
Publication statusPublished - 27 Nov 2013
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint

Dive into the research topics of 'Effects of berry curvature on the collective modes of ultracold gases'. Together they form a unique fingerprint.

Cite this