Entanglement Witness Operator for Quantum Teleportation

被引：45
|
作者：
Ganguly, Nirman [1 ,2 ]
Adhikari, Satyabrata [3 ]
Majumdar, A. S. [2 ]
Chatterjee, Jyotishman [1 ]
机构：
[1] Heritage Inst Technol, Dept Math, Kolkata 107, W Bengal, India
[2] SN Bose Natl Ctr Basic Sci, Kolkata 700098, India
[3] Inst Phys, Bhubaneswar 751005, Orissa, India
来源：
PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 27期
关键词：
SEPARABILITY; STATES; FRACTION;
D O I：
10.1103/PhysRevLett.107.270501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The ability of entangled states to act as a resource for teleportation is linked to a property of the fully entangled fraction. We show that the set of states with their fully entangled fraction bounded by a threshold value required for performing teleportation is both convex and compact. This feature enables the existence of Hermitian witness operators, the measurement of which could distinguish unknown states useful for performing teleportation. We present an example of such a witness operator illustrating it for different classes of states.
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页数：5
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