ITP OpenIR  > 理论物理所2015年知识产出
Two-dimensional Bose-Einstein condensate under pressure
Cho, W; Kim, SW; Park, JH; Cho, W (reprint author), Sogang Univ, Dept Phys, Seoul 121742, South Korea.
2015
发表期刊NEW JOURNAL OF PHYSICS
卷号17期号:0页码:13038
文章类型Article
摘要Evading the Mermin-Wagner-Hohenberg no-go theorem and revisiting with rigor the ideal Bose gas confined in a square box, we explore a discrete phase transition in two spatial dimensions. Through both analytic and numerical methods, we verify that thermodynamic instability emerges if the number of particles is sufficiently yet finitely large: specifically, N >= 35131. The instability implies that the isobar of the gas zigzags on the temperature-volume plane, featuring supercooling and superheating phenomena. The Bose-Einstein condensation can then persist from absolute zero to the superheating temperature. Without necessarily taking the large N limit, under a constant pressure condition, the condensation takes place discretely both in the momentum and in the position spaces. Our result is applicable to a harmonic trap. We assert that experimentally observed Bose-Einstein condensations of harmonically trapped atomic gases are a first-order phase transition that involves a discrete change of the density at the center of the trap.
关键词Ideal Bose Gas Emergence First-order Phase Transition Two Dimensions
学科领域Physics
DOIhttp://dx.doi.org/10.1088/1367-2630/17/1/013038
关键词[WOS]LONG-RANGE ORDER ; SYMMETRY ; SYSTEMS ; TRAPS
收录类别SCI
语种英语
WOS类目Physics, Multidisciplinary
引用统计
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/21112
专题理论物理所2015年知识产出
通讯作者Cho, W (reprint author), Sogang Univ, Dept Phys, Seoul 121742, South Korea.
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Cho, W,Kim, SW,Park, JH,et al. Two-dimensional Bose-Einstein condensate under pressure[J]. NEW JOURNAL OF PHYSICS,2015,17(0):13038.
APA Cho, W,Kim, SW,Park, JH,&Cho, W .(2015).Two-dimensional Bose-Einstein condensate under pressure.NEW JOURNAL OF PHYSICS,17(0),13038.
MLA Cho, W,et al."Two-dimensional Bose-Einstein condensate under pressure".NEW JOURNAL OF PHYSICS 17.0(2015):13038.
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