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arXiv 1908.10847cond-mat.supr-concond-mat.str-el
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耦合到阿贝尔规范场的$\mathrm{SU}(N)$理论中的涡旋和复合序

Vortices and composite order in $\mathrm{SU}(N)$ theories coupled to Abelian gauge field

Daniel Weston, Egor Babaev

摘要:

我们考虑耦合到非紧阿贝尔规范场的$\mathrm{SU}(N)$对称Ginzburg-Landau模型,主要研究有限温度下$N > 2$的情形。我们表明,至少对于足够大的规范场耦合常数,这些模型有两个相变。介于对称相和低温相之间的中间相是一种复合中性有序状态,不存在迈斯纳效应。在这个中性阶段,系统自发地破坏了与组分之间的相位差和密度差相关的对称性。对于$N > 2$,与$SU(2)$情况相反,中性状态不能映射到$\mathrm{O}(M)$模型上。我们将这种状态称为${\mathbb{C}{P}}^{N-1}$ -中性相。我们还表明,虽然$\mathrm{SU}(N)$对称的金斯堡-朗道模型不是超导体或超流体在通常意义上,在足够低的温度下,在外场中的状态是一个涡旋晶格。

英文摘要:

We consider $\mathrm{SU}(N)$-symmetric Ginzburg-Landau models coupled to non-compact Abelian gauge field focusing on the case $N > 2$ at finite temperature. We show that, at least for sufficiently large gauge-field coupling constants, these models have two phase transitions. The intermediate phase between the symmetric and low-temperature phases is a state with composite neutral order and no Meissner effect. In this neutral phase the system spontaneously breaks only the symmetry associated with phase differences and density differences between components. For $N > 2$, in contrast to the $SU(2)$ case, the neutral state cannot be mapped onto an $\mathrm{O}(M)$ model. We term this state ${\mathbb{C}{P}}^{N-1}$-neutral phase. We also show that while $\mathrm{SU}(N)$-symmetric Ginzburg-Landau models are not superconductors or superfluids in the usual sense, their state in external field at sufficiently low temperature is a vortex lattice.

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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