Quantum criticality and the Tomonaga-Luttinger liquid in one-dimensional Bose gases
Date
2017
Authors
Yang, Bing
Chen, Yang-Yang
Zheng, Yong-Guang
Sun, Hui
Dai, Han-Ning
Guan, Xi-Wen
Yuan, Zhen-Sheng
Pan, Jian-Wei
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American Physical Society
Abstract
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.
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Physical Review Letters
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Journal article
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Open Access
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