Entanglement entropy of squeezed vacua on a lattice

Entanglement entropy of squeezed vacua on a lattice
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晶格上压缩真空的纠缠熵

DOI:
10.1103/physrevd.92.085045
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发表时间:
2015
期刊:
影响因子:
5
通讯作者:
Yokomizo, Nelson
Yokomizo, Nelson
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Bianchi, Eugenio;Hackl, Lucas;Yokomizo, Nelson

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利用复数结构,推导出了晶格上压缩态的纠缠熵公式。分析涉及到压缩态与辛群的群论相干态的识别以及陪集与复杂结构空间之间的关系。我们给出了新公式的两个应用:(I)我们导出了小声速极限下一般晶格上标量场基态的面积定律,(Ii)我们计算了存在不稳定性时纠缠熵的增长率,并证明了它是由Kolmogorov-Sinai速率从上面渐近有界的。
We derive a formula for the entanglement entropy of squeezed states on a lattice in terms of the complex structure. The analysis involves the identification of squeezed states with group-theoretical coherent states of the symplectic group and the relation between the cosetand the space of complex structures. We present two applications of the new formula: (i) we derive the area law for the ground state of a scalar field on a generic lattice in the limit of small speed of sound, (ii) we compute the rate of growth of the entanglement entropy in the presence of an instability and show that it is asymptotically bounded from above by the Kolmogorov-Sinai rate.
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