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arXiv 1003.0426cond-mat.quant-gas
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吸引格点玻色子自陷跃迁的量子特征

Quantum signatures of self-trapping transition in attractive lattice bosons

P. Buonsante, V. Penna, A. Vezzani

摘要:

我们考虑玻色-哈伯德模型描述吸引玻色粒子在双折射不变晶格中跳跃的情形,并将相应的基态性质与相应的双折射破缺半经典非线性理论进行了比较.引入一个合适的措施,使我们能够突出非线性理论和固有的线性量子理论,其特征在于众所周知的自陷现象之间的许多对应关系。特别是我们证明了半经典基态的局域化性质和分岔模式可以在量子水平上清楚地识别。我们的分析强调了有限数效应。

英文摘要:

We consider the Bose-Hubbard model describing attractive bosonic particles hopping across the sites of a translation-invariant lattice, and compare the relevant ground-state properties with those of the corresponding symmetry-breaking semiclassical nonlinear theory. The introduction of a suitable measure allows us to highlight many correspondences between the nonlinear theory and the inherently linear quantum theory, characterized by the well-known self-trapping phenomenon. In particular we demonstrate that the localization properties and bifurcation pattern of the semiclassical ground-state can be clearly recognized at the quantum level. Our analysis highlights a finite-number effect.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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