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arXiv 1307.2005cond-mat.quant-gas
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双子格硬核玻色子模型的能谱和phase diagrams

Energy spectrum and phase diagrams of two-sublattice hard-core boson model

I. V. Stasyuk, O. Vorobyov

摘要:

在无规相位近似框架下,得到了双子格硬核玻色子模型的能谱、谱密度和相图。研究了温度、化学势和子晶格中局域位置间能量差变化时玻色子谱的重构。建立了与Mott-绝缘体(MI)或电荷密度(CDW)相接近的正常相以及具有玻色-爱因斯坦凝聚体的相(SF相)的相图。

英文摘要:

The energy spectrum, spectral density and phase diagrams have been obtained for two-sublattice hard-core boson model in frames of random phase approximation approach. Reconstruction of boson spectrum at the change of temperature, chemical potential and energy difference between local positions in sublattices is studied. The phase diagrams illustrating the regions of existence of a normal phase which can be close to Mott-insulator (MI) or charge-density (CDW) phases as well as the phase with the Bose-Einstein condensate (SF phase) are built.

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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