Structure of quantum entanglement at a finite temperature critical point
Structure of quantum entanglement at a finite temperature critical point
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有限温度临界点的量子纠缠结构
DOI:
10.1103/physrevresearch.2.043345
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发表时间:
2020
影响因子:
4.2
通讯作者:
Grover, Tarun
中科院分区:
文献类型:
--
作者:
Lu, Tsung-Cheng;Grover, Tarun
We introduce a framework to distinguish long-range quantum entanglement from long-range classical correlations close to a finite temperature critical point in a quantum system. In particular, we employ “tripartite entanglement negativity,” a mixed-state entanglement measure, to cancel out critical correlations that are purely classical in origin. As an application, we study an exactly solvable model, and find that the tripartite negativity does not exhibit any singularity in the thermodynamic limit across the transition. This indicates that the long-distance critical fluctuations are completely classical, and it allows one to define a “quantum correlation length” that remains finite at the transition despite a divergent physical correlation length. Motivated by our model, we also study mixed-state entanglement in tight-binding models of bosons withand time-reversal symmetries. By employing Glauber-Sudarshan representation, we find a surprising result that such states have zero entanglement.
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DOI:
10.1088/1742-5468/aa668a
发表时间:
2016-11
期刊:
Journal of Statistical Mechanics: Theory and Experiment
影响因子:
--
作者:
Xiao Chen;W. Witczak-Krempa;T. Faulkner;E. Fradkin
通讯作者:
Xiao Chen;W. Witczak-Krempa;T. Faulkner;E. Fradkin
影响因子:
8.6
作者:
A. Ferraro;D. Cavalcanti;A. García;A. Acín
通讯作者:
A. Acín
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
M. Chung;I. Peschel
通讯作者:
I. Peschel
影响因子:
3.3
作者:
V. Eisler;Z. Zimborás
通讯作者:
Z. Zimborás
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Chia;V. Alba;L. Bonnes;Pochung Chen;A. Lauchli
通讯作者:
A. Lauchli