Equation of State of Ultracold Fermions in the 2D BEC-BCS Crossover Region

被引：98

作者：

Boettcher, I. ^{[1
]}

Bayha, L. ^{[2
]}

Kedar, D. ^{[2
]}

Murthy, P. A. ^{[2
]}

Neidig, M. ^{[2
]}

Ries, M. G. ^{[2
]}

Wenz, A. N. ^{[2
]}

Zuern, G. ^{[2
]}

Jochim, S. ^{[2
]}

Enss, T. ^{[1
]}

机构：

[1] Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany

[2] Heidelberg Univ, Inst Phys, D-69120 Heidelberg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 04期

基金：

欧洲研究理事会;

关键词：

CONTINUOUS SYMMETRY GROUP; LONG-RANGE ORDER; 2-DIMENSIONAL SYSTEMS; BOSE-CONDENSATION; LIQUID THEORY; GAS; SUPERCONDUCTIVITY; DIMENSIONS; THERMODYNAMICS; DESTRUCTION;

D O I：

10.1103/PhysRevLett.116.045303

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the experimental measurement of the equation of state of a two-dimensional Fermi gas with attractive s-wave interactions throughout the crossover from a weakly coupled Fermi gas to a Bose gas of tightly bound dimers as the interaction strength is varied. We demonstrate that interactions lead to a renormalization of the density of the Fermi gas by several orders of magnitude. We compare our data near the ground state and at finite temperature with predictions for both fermions and bosons from quantum Monte Carlo simulations and Luttinger-Ward theory. Our results serve as input for investigations of close-to-equilibrium dynamics and transport in the two-dimensional system.

引用

页数：5

共 60 条

[1] Pressure, Compressibility, and Contact of the Two-Dimensional Attractive Fermi Gas [J].