The quantum pressure correction to the excitation spectrum of the trapped superfluid Fermi gases in a BEC-BCS crossover |
| |
Authors: | Dong Hang and Ma Yong-Li |
| |
Institution: | Department of Physics, Fudan University, Shanghai 200433, China |
| |
Abstract: | Using quantum hydrodynamic approaches, we study the quantum pressure
correction to the collective excitation spectrum of the interacting
trapped superfluid Fermi gases in the BEC-BCS crossover. Based on a
phenomenological equation of state, we derive hydrodynamic equations
of the system in the whole BEC-BCS crossover regime. Beyond the
Thomas--Fermi approximation, expressions of the frequency
corrections of collective modes for both spherical and axial
symmetric traps excited in the BEC-BCS crossover are given
explicitly. The corrections of the eigenfrequencies due to the
quantum pressure and their dependence on the inverse interaction
strength, anisotropic parameter and particle numbers of the
condensate are discussed in detail. |
| |
Keywords: | BEC-BCS crossover hydrodynamic
approaches perturbation method |
本文献已被 维普 等数据库收录! |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
| 点击此处可从《中国物理 B》下载免费的PDF全文 |
|