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arXiv 2104.06994hep-thcond-mat.stat-mechmath-phmath.MP
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共形场论中两个不相交区间的纠缠与二维库仑气体

Entanglement of two disjoint intervals in conformal field theory and the 2D Coulomb gas on a lattice

Tamara Grava, Andrew P. Kels, Erik Tonni

摘要:

在由Ising和Dirac模型给出的共形场论中,当系统处于基态时,两个不相交区间的约化密度矩阵的矩及其部分转置的矩被写为具有$\mathbb{Z}_n$对称性的高亏格Riemann曲面上的配分函数。我们证明了这些配分函数可以表示为二维二组分经典库仑气体在某些圆晶格上的巨正则配分函数,在特定的耦合常数值。

英文摘要:

In the conformal field theories given by the Ising and Dirac models, when the system is in the ground state, the moments of the reduced density matrix of two disjoint intervals and of its partial transpose have been written as partition functions on higher genus Riemann surfaces with $\mathbb{Z}_n$ symmetry. We show that these partition functions can be expressed as the grand canonical partition functions of the two-dimensional two component classical Coulomb gas on certain circular lattices at specific values of the coupling constant.

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