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arXiv 1104.0522hep-latnucl-th
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双色致密物质中的拓扑涨落

Topological Fluctuations in Dense Matter with Two Colors

Simon Hands, Philip Kenny

摘要:

本文研究了在低温和非零化学势$μ$下,含有N_f=2和4味Wilson费米子的SU(2)格点规范理论的拓扑电荷涨落.拓扑磁化率,chi_T,被用来表征不同的物理制度,因为μ是不同的开始之间的物质在mu_o和颜色deconconfinement在mu_d。通过德拜屏蔽物质的瞬子抑制也进行了研究,揭示了微扰预测没有捕获的效果。特别是,标度不变性的破坏导致平均瞬子大小rho在起始和解除禁闭之间的区域中变得依赖于μ,在μ_o<mu<mu_d的范围内rho~1/mu ^2,导致chi_T在紧接起始之上的增强。

英文摘要:

We study the topological charge fluctuations of an SU(2) lattice gauge theory containing both N_f=2 and 4 flavors of Wilson fermion, at low temperature with non-zero chemical potential $μ$. The topological susceptibility, chi_T, is used to characterize differing physical regimes as mu is varied between the onset of matter at mu_o and and color deconfinement at mu_d. Suppression of instantons by matter via Debye screening is also investigated, revealing effects not captured by perturbative predictions. In particular, the breaking of scale invariance leads to the mean instanton size rho becoming mu-dependent in the regime between onset and deconfinement, with a scaling rho~1/mu^2 over the range mu_o<mu<mu_d, resulting in an enhancement of chi_T immediately above onset.

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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