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DOI number:10.1103/PhysRevLett.119.165701

Journal:Physical Review Letters

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.

Indexed by:Journal paper

Discipline:Natural Science

First-Level Discipline:Physics

Translation or Not:no

Included Journals:SCI

Links to published journals:https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.165701