中国物理B ›› 2015, Vol. 24 ›› Issue (5): 50311-050311.doi: 10.1088/1674-1056/24/5/050311

所属专题: TOPICAL REVIEW — Precision measurement and cold matters

• TOPICAL REVIEW—Precision measurement and cold matters • 上一篇    下一篇

Understanding many-body physics in one dimension from the Lieb-Liniger model

姜玉铸a b, 陈洋洋a b, 管习文a b   

  1. a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    b Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China
  • 收稿日期:2015-01-13 修回日期:2015-02-22 发布日期:2015-05-25
  • 基金资助:

    Project supported by the National Basic Research Program of China (Grant No. 2012CB922101) and the National Natural Science Foundation of China (Grant Nos. 11374331 and 11304357).

Understanding many-body physics in one dimension from the Lieb-Liniger model

Jiang Yu-Zhu (姜玉铸)a b, Chen Yang-Yang (陈洋洋)a b, Guan Xi-Wen (管习文)a b   

  1. a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
    b Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China
  • Received:2015-01-13 Revised:2015-02-22 Published:2015-05-25
  • Contact: Guan Xi-Wen E-mail:xwe105@wipm.ac.cn
  • About author:2015-4-17
  • Supported by:

    Project supported by the National Basic Research Program of China (Grant No. 2012CB922101) and the National Natural Science Foundation of China (Grant Nos. 11374331 and 11304357).

摘要:

This article presents an elementary introduction on various aspects of the prototypical integrable model the Lieb- Liniger Bose gas ranging from the cooperative to the collective features of many-body phenomena. In 1963, Lieb and Liniger first solved this quantum field theory many-body problem using Bethe's hypothesis, i.e., a particular form of wavefunction introduced by Bethe in solving the one-dimensional Heisenberg model in 1931. Despite the Lieb-Liniger model is arguably the simplest exactly solvable model, it exhibits rich quantum many-body physics in terms of the aspects of mathematical integrability and physical universality. Moreover, the Yang-Yang grand canonical ensemble description for the model provides us with a deep understanding of quantum statistics, thermodynamics, and quantum critical phenomena at the many-body physical level. Recently, such fundamental physics of this exactly solved model has been attracting growing interest in experiments. Since 2004, there have been more than 20 experimental papers that reported novel observations of different physical aspects of the Lieb-Liniger model in the laboratory. So far the observed results are in excellent agreement with results obtained using the analysis of this simplest exactly solved model. Those experimental observations reveal the unique beauty of integrability.

关键词: many-body physics, Lieb-Liniger model

Abstract:

This article presents an elementary introduction on various aspects of the prototypical integrable model the Lieb- Liniger Bose gas ranging from the cooperative to the collective features of many-body phenomena. In 1963, Lieb and Liniger first solved this quantum field theory many-body problem using Bethe's hypothesis, i.e., a particular form of wavefunction introduced by Bethe in solving the one-dimensional Heisenberg model in 1931. Despite the Lieb-Liniger model is arguably the simplest exactly solvable model, it exhibits rich quantum many-body physics in terms of the aspects of mathematical integrability and physical universality. Moreover, the Yang-Yang grand canonical ensemble description for the model provides us with a deep understanding of quantum statistics, thermodynamics, and quantum critical phenomena at the many-body physical level. Recently, such fundamental physics of this exactly solved model has been attracting growing interest in experiments. Since 2004, there have been more than 20 experimental papers that reported novel observations of different physical aspects of the Lieb-Liniger model in the laboratory. So far the observed results are in excellent agreement with results obtained using the analysis of this simplest exactly solved model. Those experimental observations reveal the unique beauty of integrability.

Key words: many-body physics, Lieb-Liniger model

中图分类号:  (Degenerate Fermi gases)

  • 03.75.Ss
71.10.Pm (Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.)) 02.30.Ik (Integrable systems)