Witnessing nonseparability of bipartite quantum operations

被引：2
|
作者：
Sohail [1 ]
Sen, Ujjwal [1 ]
机构：
[1] HBNI, Harish Chandra Res Inst, Quantum Informat & Computat Grp, Allahabad 211019, Uttar Pradesh, India
来源：
PHYSICS LETTERS A | 2021年 / 404卷
关键词：
Entanglement witness; Witness for nonseparability of quantum operations; Hahn-Banach theorem; State-operator isomorphism; POSITIVE LINEAR-MAPS; STATES; SEPARABILITY; OPERATORS;
D O I：
10.1016/j.physleta.2021.127411
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We provide a method for witnessing nonseparability of quantum processes on shared systems, which uses the channel-state duality. The method uses a maximally entangled state as a resource. We show that using the resource provides significant advantage over the corresponding protocol for nonseparability detection without the resource. (C) 2021 Elsevier B.V. All rights reserved.
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页数：5
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