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arXiv 1603.04516gr-qchep-th
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指数非线性电动力学下金属/超导体相变的全息纠缠熵

Holographic entanglement entropy in metal/superconductor phase transition with exponential nonlinear electrodynamics

Weiping Yao, Jiliang Jing

摘要:

研究了四维和五维时空中金属/超导体相变中的全息纠缠熵.我们发现全息纠缠熵是研究全息相变性质的有力工具。对于$\langle\mathcal{O}_{+}\rangle$算符,我们观察到四维时空中的纠缠熵在金属相中随ENE参数的增加而减小,而在超导相中随ENE参数的增加而非单调变化.有趣的是,随着ENE因子的变化,5维时空中两个相位的纠缠熵的变化是单调的。对于运营商$\langle\mathcal{O}_{-}\rangle$,我们表明,纠缠熵在四维和五维的行为单调变化的两个阶段作为一个调谐的ENE的强度。此外,对于这两种算符,四维或五维黑洞中的纠缠熵都随着区域宽度的增加而增加。

英文摘要:

We study the holographic entanglement entropy in metal/superconductor phase transition with exponential nonlinear electrodynamics (ENE) in four and five dimensional spacetimes. We find that the holographic entanglement entropy is powerful tool in studying the properties of the holographic phase transition. For the operator $\langle\mathcal{O}_{+}\rangle$, we observe that the entanglement entropy in 4-dimensional spacetime decreases in metal phase but changes non-monotonously in superconducting phase with the increase of the ENE parameter. Interestingly, the change of the entanglement entropy in 5-dimensional spacetime for both the phases is monotonous as the ENE factor alters. For the operator $\langle\mathcal{O}_{-}\rangle$, we show that the behavior of entanglement entropy in four and five dimensions changes monotonously for both phases as one tunes the strength of the ENE. Furthermore, for both the operators the entanglement entropy in four or five dimensional black hole increases with the increase of the width of the region.

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