Quantum criticality and the Tomonaga-Luttinger liquid in one-dimensional Bose gases

被引：68

作者：

Yang, Bing ^{[1
,2
,4
]}

Chen, Yang-Yang ^{[3
]}

Zheng, Yong-Guang ^{[1
,2
,4
]}

Sun, Hui ^{[1
,2
,4
]}

Dai, Han-Ning ^{[1
,2
,4
]}

Guan, Xi-Wen ^{[3
,5
]}

Yuan, Zhen-Sheng ^{[1
,2
,4
,6
,7
]}

Pan, Jian-Wei ^{[1
,2
,4
,6
,7
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

[3] Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China

[4] Heidelberg Univ, Phys Inst, Neuenheimer Feld 226, D-69120 Heidelberg, Germany

[5] Australian Natl Univ, Res Sch Phys & Engn, Dept Theoret Phys, Canberra, ACT 0200, Australia

[6] CAS Alibaba Quantum Comp Lab, Shanghai 201315, Peoples R China

[7] Univ Sci & Technol China, CAS Ctr Excellence & Synerget Innovat Ctr Quantum, Hefei 230026, Anhui, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 119卷 / 16期

基金：

澳大利亚研究理事会; 国家重点研发计划;

关键词：

ULTRACOLD ATOMS; OPTICAL LATTICES; PHASE-TRANSITION; FERMI GAS; BOSONS; SPIN; PROPAGATION; SUPERFLUID; INSULATOR; SYSTEMS;

D O I：

10.1103/PhysRevLett.119.165701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We experimentally investigate the quantum criticality and Tomonaga-Luttinger liquid (TLL) behavior within one-dimensional (1D) ultracold atomic gases. Based on the measured density profiles at different temperatures, the universal scaling laws of thermodynamic quantities are observed. The quantum critical regime and the relevant crossover temperatures are determined through the double-peak structure of the specific heat. In the TLL regime, we obtain the Luttinger parameter by probing sound propagation. Furthermore, a characteristic power-law behavior emerges in the measured momentum distributions of the 1D ultracold gas, confirming the existence of the TLL.

引用

页数：6

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