Quantum stirring as a probe of superfluidlike behavior in interacting one-dimensional Bose gases

被引：11
作者：
Citro, R. [1 ,2 ]
Minguzzi, A. [3 ]
Hekking, F. W. J. [3 ]
机构：
[1] Univ Salerno, Dipartimento Fis ER Caianiello, Unita CNISM, I-84081 Baronissi, Italy
[2] CNR INFM, Lab SuperMat, I-84081 Baronissi, Italy
[3] Univ Grenoble 1, CNRS, Lab Phys & Modelisat Mileux Condenses, F-38042 Grenoble, France
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 17期
关键词：
boson systems; fluctuations; Luttinger liquid; superfluidity; EINSTEIN CONDENSED GAS; CRITICAL VELOCITY; TRANSPORT; CHANNEL; BOSONS;
D O I：
10.1103/PhysRevB.79.172505
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We propose quantum stirring with a laser beam as a probe of superfluidlike behavior for a strongly interacting one-dimensional Bose gas confined to a ring. Within the Luttinger liquid theory framework, we calculate the fraction of stirred particles per period as a function of the stirring velocity, the interaction strength, and the coupling between the stirring beam and the bosons. We show that the stirred fraction is never zero due to the presence of strong quantum fluctuations in one dimension, implying imperfect superfluid behavior under transport. Some experimental issues on quantum stirring in ring-trapped condensates are discussed.
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页数：4
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