Thermal enhancement of entanglement sensitivity to the phase diagram in XY model

被引：0

作者：

Nakata, Yoshifumi ^{[1
,2
]}

Markham, Damian ^{[1
,3
]}

Murao, Mio ^{[1
,2
,4
]}

机构：

[1] Univ Tokyo, Dept Phys, Grad Sch, Bunkyo Ku, Tokyo 1130033, Japan

[2] Univ Tokyo, Inst Nano Quantum Informat Elect, Tokyo 1130033, Japan

[3] Univ Paris 07, F-75013 Paris, France

[4] JST, PRESTO, Kawaguchi, Saitama 3320012, Japan

来源：

INTERNATIONAL JOURNAL OF QUANTUM INFORMATION | 2008年 / 6卷

关键词：

multi-partite entanglement; thermal state; XY model;

D O I：

10.1142/S0219749908004067

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

To understand multi-partite entanglement of the thermal state in the 1D spin 1/2 XY model with a transverse magnetic field, we investigate the temperature below which the thermal state is certainly entangled. We refer to such a temperature as a threshold temperature. We show that two characteristic lines in the phase diagram at zero temperature of the XY model can be clearly emphasized by the threshold temperature.

引用

页码：751 / 757

页数：7

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