Entanglement-induced geometric phase of quantum states

被引：4
|
作者：
Sjoqvist, Erik [1 ]
机构：
[1] Uppsala Univ, Dept Quantum Chem, SE-75120 Uppsala, Sweden
来源：
PHYSICS LETTERS A | 2010年 / 374卷 / 13-14期
基金：
瑞典研究理事会;
关键词：
Geometric phase; Quantum entanglement; Relative states; MIXED STATES;
D O I：
10.1016/j.physleta.2010.01.053
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The concept of relative state is used to introduce geometric phases that originate from correlations in states of composite quantum systems. In particular, we identify an entanglement-induced geometric phase in terms of a weighted average of geometric phase factors associated with a decomposition that define the entanglement of formation. An explicit procedure to calculate the entanglement-induced geometric phase for qubit pairs is put forward. We illustrate it for maximally entangled mixed states (MEMS) of two qubits. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1431 / 1433
页数：3
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