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篇目详细内容 |
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【篇名】 |
Theory of superfluidity and drag force in the one-dimensional Bose gas |
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【刊名】 |
Frontiers of Physics |
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【刊名缩写】 |
Front. Phys |
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【ISSN】 |
2095-0462 |
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【EISSN】 |
2095-0470 |
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【DOI】 |
10.1007/s11467-011-0211-2 |
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【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
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【出版年】 |
2012 |
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【卷期】 |
7
卷1期 |
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【页码】 |
54-71
页,共
18
页 |
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【作者】 |
Alexander Yu. Cherny;
Jean-Sé;
bastien Caux;
Joachim Brand;
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【关键词】 |
Lieb–Liniger model; Tonks–Girardeau gas; Luttinger liquid; drag force; superfluidity; dynamical structure factor |
【摘要】 |
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The one-dimensional Bose gas is an unusual superfluid. In contrast to higher spatial dimensions, the existence of non-classical rotational inertia is not directly linked to the dissipationless motion of infinitesimal impurities. Recently, experimental tests with ultracold atoms have begun and quantitative predictions for the drag force experienced by moving obstacles have become available. This topical review discusses the drag force obtained from linear response theory in relation to Landau’s criterion of superfluidity. Based upon improved analytical and numerical understanding of the dynamical structure factor, results for different obstacle potentials are obtained, including single impurities, optical lattices and random potentials generated from speckle patterns. The dynamical breakdown of superfluidity in random potentials is discussed in relation to Anderson localization and the predicted superfluid–insulator transition in these systems. |
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