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arXiv 0906.3727cond-mat.str-elcond-mat.stat-mech
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含超冷碱土原子的多轨道SU(N)磁体中的液体

Liquids in multi-orbital SU(N) Magnets with Ultracold Alkaline Earth Atoms

Cenke Xu

摘要:

本文研究了一类k轨道SU(N)自旋系统的液态,重点研究了k = 2的情况,这种情况可以通过超冷碱土原子被囚禁在光晶格中来实现,其中N为10。考虑了具有选择性耦合的电荷、自旋和轨道量子涨落的五种不同的代数液态。采用系统的1/N展开法计算了物理序参量的标度维数。本文还研究了这些液态之间的相变,所有的代数液态都可以从一个具有SU(2)× U(1)规范对称性的“母”态得到。

英文摘要:

In this work we study one family of liquid states of k-orbital SU(N) spin systems, focusing on the case of k = 2 which can be realized by ultracold alkaline earth atoms trapped in optical lattices, with N as large as 10. Five different algebraic liquid states with selectively coupled charge, spin and orbital quantum fluctuations are considered. The algebraic liquid states can be stabilized with large enough N, and the scaling dimension of physical order parameters is calculated using a systematic 1/N expansion. The phase transitions between these liquid states are also studied, and all the algebraic liquid states discussed in this work can be obtained from one "mother" state with SU(2) x U(1) gauge symmetry.

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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