Phys. Rev. Lett. 98, 050401 (2007) [4 pages]Spontaneous Emergence of Angular Momentum Josephson Oscillations in Coupled Annular Bose-Einstein CondensatesSee Also: Erratum Received 18 September 2006; published 29 January 2007 We investigate the nonlinear dynamics of two coupled annular Bose-Einstein condensates (BECs). For certain values of the coupling strength the nonrotating state with uniform density is unstable with respect to fluctuations in the higher angular momentum modes. The Bogoliubov spectrum possesses two branches, one of which exhibits distinct regions of instability enabling one to selectively occupy certain angular momentum modes. For sufficiently long evolution times, angular momentum Josephson oscillations spontaneously appear, breaking the initial chiral symmetry of the BECs. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.050401
DOI:
10.1103/PhysRevLett.98.050401
PACS:
03.75.Lm, 03.75.Kk, 03.75.Mn
See AlsoErratum: I. Lesanovsky and W. von Klitzing, Erratum: Spontaneous Emergence of Angular Momentum Josephson Oscillations in Coupled Annular Bose-Einstein Condensates [Phys. Rev. Lett. 98, 050401 (2007)], Phys. Rev. Lett. 102, 039901 (2009). |
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