Collective many-body bounce in the breathing-mode oscillations of a Tonks-Girardeau gas

被引：22

作者：

Atas, Y. Y. ^{[1
]}

Bouchoule, I. ^{[2
]}

Gangardt, D. M. ^{[3
]}

Kheruntsyan, K. V. ^{[1
]}

机构：

[1] Univ Queensland, Sch Math & Phys, Brisbane, Qld 4072, Australia

[2] Univ Paris Sud 11, CNRS, Inst Opt, Lab Charles Fabry, 2 Ave Augustin Fresnel, F-91127 Palaiseau, France

[3] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

来源：

PHYSICAL REVIEW A | 2017年 / 96卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

BOSE-EINSTEIN CONDENSATE; IMPENETRABLE BOSONS; ULTRACOLD GASES; EXCITATIONS; SYSTEMS; RELAXATION; SYMMETRY; DYNAMICS;

D O I：

10.1103/PhysRevA.96.041605

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We analyze the breathing-mode oscillations of a harmonically quenched Tonks-Giradeau (TG) gas using an exact finite-temperature dynamical theory. We predict a striking collective manifestation of impenetrability-a collective many-body bounce effect. The effect, although being invisible in the evolution of the in situ density profile of the gas, can be revealed through a nontrivial periodic narrowing of its momentum distribution, taking place at twice the rate of the fundamental breathing-mode frequency. We identify physical regimes for observing the many-body bounce and construct the respective nonequilibrium phase diagram as a function of the quench strength and the initial temperature of the gas. We also develop a finite-temperature hydrodynamic theory of the TG gas wherein the many-body bounce is explained by an increased thermodynamic pressure during the isentropic compression cycle, which acts as a potential barrier for the particles to bounce off.

引用

页数：6

共 46 条

[21] Collective modes of a one-dimensional trapped atomic Bose gas at finite temperatures [J].

Hu, Hui ;

Gao Xianlong ;

Liu, Xia-Ji .

PHYSICAL REVIEW A, 2014, 90 (01)

[22] Temperature-dependent damping and frequency shifts in collective excitations of a dilute Bose-Einstein condensate [J].

Jin, DS ;

Matthews, MR ;

Ensher, JR ;

Wieman, CE ;

Cornell, EA .

PHYSICAL REVIEW LETTERS, 1997, 78 (05) :764-767

[23] Collective excitations of a Bose-Einstein condensate in a dilute gas [J].

Jin, DS ;

Ensher, JR ;

Matthews, MR ;

Wieman, CE ;

Cornell, EA .

PHYSICAL REVIEW LETTERS, 1996, 77 (03) :420-423

[24] Evolution of a Bose-condensed gas under variations of the confining potential [J].

Kagan, Y ;

Surkov, EL ;

Shlyapnikov, GV .

PHYSICAL REVIEW A, 1996, 54 (03) :R1753-R1756

[25] A quantum Newton's cradle [J].

Kinoshita, T ;

Wenger, T ;

Weiss, DS .

NATURE, 2006, 440 (7086) :900-903

[26]

Lamacraft A., 2012, CONT CONCEPTS CONDEN, V5

[27] Collective oscillations of a one-dimensional trapped Bose-Einstein gas [J].

Menotti, C ;

Stringari, S .

PHYSICAL REVIEW A, 2002, 66 (04) :6

[28] Collective excitations of a Bose-Einstein condensate in a magnetic trap [J].

Mewes, MO ;

Andrews, MR ;

vanDruten, NJ ;

Kurn, DM ;

Durfee, DS ;

Townsend, CG ;

Ketterle, W .

PHYSICAL REVIEW LETTERS, 1996, 77 (06) :988-991

[29] Exact coherent states of a harmonically confined Tonks-Girardeau gas [J].

Minguzzi, A ;

Gangardt, DM .

PHYSICAL REVIEW LETTERS, 2005, 94 (24)

[30] High-momentum tail in the Tonks gas under harmonic confinement [J].

Minguzzi, A ;

Vignolo, P ;

Tosi, MP .

PHYSICS LETTERS A, 2002, 294 (3-4) :222-226

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