Quench-Induced Breathing Mode of One-Dimensional Bose Gases

被引：70
作者：
Fang, Bess [1 ]
Carleo, Giuseppe [1 ]
Johnson, Aisling [1 ]
Bouchoule, Isabelle [1 ]
机构：
[1] Univ Paris 11, CNRS, Inst Opt, Lab Charles Fabry, F-91127 Palaiseau, France
来源：
PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 03期
基金：
奥地利科学基金会;
关键词：
MANY-BODY SYSTEM; IMPENETRABLE BOSONS; EINSTEIN CONDENSATE; QUANTUM; EXCITATIONS; RELAXATION;
D O I：
10.1103/PhysRevLett.113.035301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We measure the position- and momentum-space breathing dynamics of trapped one-dimensional Bose gases at finite temperature. The profile in real space reveals sinusoidal width oscillations whose frequency varies continuously through the quasicondensate to ideal Bose gas crossover. A comparison with theoretical models taking temperature into account is provided. In momentum space, we report the first observation of a frequency doubling in the quasicondensate regime, corresponding to a self-reflection mechanism due to the repulsive interactions. Such a mechanism is predicted for a fermionized system, and has not been observed to date. The disappearance of the frequency doubling through the crossover is mapped out experimentally, giving insights into the dynamics of the breathing evolution.
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页数：5
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