ARC Centre of Excellence for Quantum-Atom Optics, Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne 3122, Australia.
Phys Rev Lett. 2011 Mar 11;106(10):105304. doi: 10.1103/PhysRevLett.106.105304.
We have studied the transition from two to three dimensions in a low temperature weakly interacting 6Li Fermi gas. Below a critical atom number N(2D) only the lowest transverse vibrational state of a highly anisotropic oblate trapping potential is occupied and the gas is two dimensional. Above N(2D) the Fermi gas enters the quasi-2D regime where shell structure associated with the filling of individual transverse oscillator states is apparent. This dimensional crossover is demonstrated through measurements of the cloud size and aspect ratio versus atom number.
我们研究了低温弱相互作用 6Li 费米气体中从二维到三维的转变。在临界原子数 N(2D)以下，只有高度各向异性扁长形囚禁势的最低横向振动态被占据，气体处于二维状态。在 N(2D)以上，费米气体进入准二维区域，其中与单个横向振荡器态填充相关的壳层结构是明显的。通过测量云大小和纵横比与原子数的关系来证明这种维度交叉。
