CUMULATIVE MEASURE OF CORRELATION FOR MULTIPARTITE QUANTUM STATES

被引：3
|
作者：
Fonseca De Oliveira, Andre L. [1 ]
Buksman, Efrain [1 ]
Garcia Lopez De Lacalle, Jesus [2 ]
机构：
[1] Univ ORT Uruguay, Fac Ingn Bernard Wand Polaken, Montevideo 11100, Uruguay
[2] Univ Politecn Madrid, Escuela Univ Informat, Madrid 28031, Spain
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2014年 / 28卷 / 07期
关键词：
Quantum information; quantum correlation measure; Heisenberg model; quantum phase transitions; RELATIVE ENTROPY; ENTANGLEMENT;
D O I：
10.1142/S0217979214500507
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The present article proposes a measure of correlation for multiqubit mixed states. The measure is defined recursively, accumulating the correlation of the subspaces, making it simple to calculate without the use of regression. Unlike usual measures, the proposed measure is continuous additive and reflects the dimensionality of the state space, allowing to compare states with different dimensions. Examples show that the measure can signal critical points (CPs) in the analysis of Quantum Phase Transitions (QPTs) in Heisenberg models.
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页数：15
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