囚禁玻色凝聚气体的低能元激发
Low-energy elementary excitations of a trapped Bose-condensed gas
摘要:
Bogolyubov-De Gennes方程,讨论了任意非对称谐振阱中玻色凝聚体在非对称费米区的激发,并介绍了本征态的分类。在圆柱对称的情况下,我们强调存在一个意外的简并在激发光谱在一定值的轨道角动量的投影对称轴,并讨论可能的后果简并的背景下,新的签名的玻色-爱因斯坦凝聚。
英文摘要:
Bogolyubov-De Gennes equations for the excitations of a Bose condensate in the Thomas-Fermi regime in harmonic traps of any asymmetry and introduce a classification of eigenstates. In the case of cylindrical symmetry we emphasize the presence of an accidental degeneracy in the excitation spectrum at certain values of the projection of orbital angular momentum on the symmetry axis and discuss possible consequences of the degeneracy in the context of new signatures of Bose-Einstein condensation.
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