Upper bound on singlet fraction of two-qubit mixed entangled states

被引：2

作者：

Adhikari, Satyabrata ^{[1
]}

Kumar, Atul ^{[2
]}

机构：

[1] Birla Inst Technol, Ranchi 835215, Bihar, India

[2] Indian Inst Technol Jodhpur, Jodhpur 342011, Rajasthan, India

来源：

QUANTUM INFORMATION PROCESSING | 2016年 / 15卷 / 07期

关键词：

QUANTUM; MATRIX;

D O I：

10.1007/s11128-016-1295-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate a new method to achieve the maximum singlet fraction using an entangled mixed two-qubit state as a resource. For this, we establish a tight upper bound on singlet fraction and show that the maximal singlet fraction obtained in Verstraete and Verschelde (Phys Rev Lett 90:097901(1)-097901(4), 2003) does not attain the upper bound on the singlet fraction derived here. Interestingly, we found that the required upper bound can, in fact, be achieved using local filtering operations.

引用

页码：2797 / 2803

页数：7

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