Two-dimensional Bose-Einstein condensate under pressure
文献类型：期刊论文
| 作者 | Cho, W; Kim, SW; Park, JH |
| 刊名 | NEW JOURNAL OF PHYSICS
 |
| 出版日期 | 2015 |
| 卷号 | 17期号:0页码:13038 |
| 关键词 | ideal Bose gas emergence first-order phase transition two dimensions |
| 通讯作者 | Cho, W (reprint author), Sogang Univ, Dept Phys, Seoul 121742, South Korea. |
| 英文摘要 | 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. |
| 学科主题 | Physics |
| 类目[WOS] | Physics, Multidisciplinary |
| 关键词[WOS] | LONG-RANGE ORDER ; SYMMETRY ; SYSTEMS ; TRAPS |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/21112]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 推荐引用方式 GB/T 7714 | Cho, W,Kim, SW,Park, JH. Two-dimensional Bose-Einstein condensate under pressure[J]. NEW JOURNAL OF PHYSICS,2015,17(0):13038. |
| APA | Cho, W,Kim, SW,&Park, JH.(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. |
入库方式： OAI收割
来源：理论物理研究所
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