中国物理B ›› 2011, Vol. 20 ›› Issue (6): 60307-060307.doi: 10.1088/1674-1056/20/6/060307

• GENERAL • 上一篇    下一篇

Composite-fermionization of the mixture composed of Tonks gas and Fermi gas

郝亚江   

  1. Department of Physics, University of Science and Technology Beijing, Beijing 100083, China
  • 收稿日期:2010-09-20 修回日期:2011-01-21 出版日期:2011-06-15 发布日期:2011-06-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11004007) and the Fundamental Research Funds for the Central Universities.

Composite-fermionization of the mixture composed of Tonks gas and Fermi gas

Hao Ya-Jiang(郝亚江)   

  1. Department of Physics, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2010-09-20 Revised:2011-01-21 Online:2011-06-15 Published:2011-06-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11004007) and the Fundamental Research Funds for the Central Universities.

摘要: This paper investigates the ground-state properties of the mixture composed of the strongly interacting Tonks-Girardeau gas and spin polarized Fermi gas confined in one-dimensional harmonic traps, where the interaction between the Bose atoms and Fermi atoms is tunable. With a generalized Bose-Fermi transformation the mixture is mapped into a two-component Fermi gas. The homogeneous Fermi gas is exactly solvable by the Bethe-ansatz method and the ground state energy density can be obtained. Combining the ground-state energy function of the homogeneous system with local density approximation it obtains the ground-state density distributions of inhomogeneous mixture. It is shown that with the increase in boson-fermion interaction, the system exhibits composite-fermionization crossover.

Abstract: This paper investigates the ground-state properties of the mixture composed of the strongly interacting Tonks-Girardeau gas and spin polarized Fermi gas confined in one-dimensional harmonic traps, where the interaction between the Bose atoms and Fermi atoms is tunable. With a generalized Bose-Fermi transformation the mixture is mapped into a two-component Fermi gas. The homogeneous Fermi gas is exactly solvable by the Bethe-ansatz method and the ground state energy density can be obtained. Combining the ground-state energy function of the homogeneous system with local density approximation it obtains the ground-state density distributions of inhomogeneous mixture. It is shown that with the increase in boson-fermion interaction, the system exhibits composite-fermionization crossover.

Key words: one-dimensional, Tonks-Fermi mixture, composite-fermionization

中图分类号:  (Multicomponent condensates; spinor condensates)

  • 03.75.Mn
03.75.Hh (Static properties of condensates; thermodynamical, statistical, and structural properties) 67.85.-d (Ultracold gases, trapped gases)