Entanglement evolution after connecting finite to infinite quantum chains

被引：74

作者：

Eisler, V. ^{[1
]}

Karevski, D. ^{[2
]}

Platini, T. ^{[2
]}

Peschel, I. ^{[1
]}

机构：

[1] Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany

[2] Univ Henri Poincare, UMR CNRS 7556, Phys Mat Lab, F-54506 Vandoeuvre Les Nancy, France

来源：

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT | 2008年

关键词：

conformal field theory (theory); spin chains; ladders and planes (theory); entanglement in extended quantum systems (theory);

D O I：

10.1088/1742-5468/2008/01/P01023

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We study zero-temperature XX chains and transverse Ising chains and join an initially separate finite piece on one or on both sides to an infinite remainder. In both critical and non-critical systems we find a typical increase of the entanglement entropy after the quench, followed by a slow decay towards the value of the homogeneous chain. In the critical case, the predictions of conformal field theory are verified for the first phase of the evolution, while at late times a step structure can be observed.

引用

页数：15

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