New Bell inequalities for three-qubit pure states

被引：15
|
作者：
Das, Arpan [1 ,2 ]
Datta, Chandan [1 ,2 ]
Agrawal, Pankaj [1 ,2 ]
机构：
[1] Sainik Sch, Inst Phys, Sachivalaya Marg, Bhubaneswar 751005, Odisha, India
[2] Homi Bhabha Natl Inst, Training Sch Complex, Bombay 400085, Maharashtra, India
来源：
PHYSICS LETTERS A | 2017年 / 381卷 / 47期
关键词：
Entanglement; Bell inequality; ENTANGLED STATES; VIOLATION; QUBITS;
D O I：
10.1016/j.physleta.2017.10.023
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We introduce a set of Bell inequalities for a three-qubit system. Each inequality within this set is violated by all generalized GHZ states. The more entangled a generalized GHZ state is, the more will be the violation. This establishes a relation between nonlocality and entanglement for this class of states. Certain inequalities within this set are violated by pure biseparable states. We also provide numerical evidence that at least one of these Bell inequalities is violated by a pure genuinely entangled state. These Bell inequalities can distinguish between separable, biseparable and genuinely entangled pure three-qubit states. We also generalize this set to n-qubit systems and may be suitable to characterize the entanglement of n-qubit pure states. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：3928 / 3933
页数：6
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