In quasi-two dimensions (quasi-2D), where excitations are frozen in one direction, the scattering amplitudes exhibit 2D features of the particle motion and a 3D to 2D dimensional crossover emerges in the behavior of scattering. We explore its physical consequences, capitalizing on a hidden connection between the Pitaevskii-Rosch dynamical symmetry and breathing modes. We find broken Pitaevskii-Rosch symmetry by arbitrarily small 2D effects, inducing a frequency shift in breathing modes. The predicted shift rises significantly from the order of 0.5% to more than 5% in transiting from the 3D-scattering to the 2D-scattering regime. Comparisons with other relevant effects suggest our results are observable within current experimental capabilities.
部门归属
[hu, ying] peking univ, int ctr quantum mat, beijing 100871, peoples r china. [liang, zhaoxin] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;hu, y (reprint author), peking univ, int ctr quantum mat, beijing 100871, peoples r china;yinggrant@gmail.com zhxliang@gmail.com
Y. Hu,Z. X. Liang. Visualization of Dimensional Effects in Collective Excitations of Optically Trapped Quasi-Two-Dimensional Bose Gases[J]. Physical Review Letters,2011,107(11).
APA
Y. Hu,&Z. X. Liang.(2011).Visualization of Dimensional Effects in Collective Excitations of Optically Trapped Quasi-Two-Dimensional Bose Gases.Physical Review Letters,107(11).
MLA
Y. Hu,et al."Visualization of Dimensional Effects in Collective Excitations of Optically Trapped Quasi-Two-Dimensional Bose Gases".Physical Review Letters 107.11(2011).
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