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Low-lying Collective Modes of a 1D Dipolar Quantum Gas in an Anharmonic Trap |
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| Authors: | Ji-Xuan Hou Li-Ming Si Da-Bao Yang |
| Affiliation: | 1.School of Physics,Southeast University,Nanjing,China;2.School of Information and Electronics,Beijing Institute of Technology,Beijing,China;3.Department of fundamental physics, School of Science,Tianjin Polytechnic University,Tianjin,China |
| Abstract: | The low-lying collective modes of an anharmonically confined one-dimensional ultracold dipolar Bose gas are investigated by using time-dependent variational method. The frequencies of dipole mode and breathing mode are obtained analytically in the full crossover regime from a Tonks-Girardeau gas to a dipolar density wave state. We find that the frequency shifts caused by quartic distortion of the potential can be amplified by interparticle interaction and the collapse and revival of the collective excitations can be observed in the anharmonic trap. |
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