中国物理B ›› 2015, Vol. 24 ›› Issue (10): 100306-100306.doi: 10.1088/1674-1056/24/10/100306

• GENERAL • 上一篇    下一篇

Scheme for purifying a general mixed entangled state and its linear optical implementation

董冬, 张延磊, 邹长铃, 邹旭波, 郭光灿   

  1. Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
  • 收稿日期:2015-03-24 修回日期:2015-06-18 出版日期:2015-10-05 发布日期:2015-10-05

Scheme for purifying a general mixed entangled state and its linear optical implementation

Dong Dong (董冬), Zhang Yan-Lei (张延磊), Zou Chang-Ling (邹长铃), Zou Xu-Bo (邹旭波), Guo Guang-Can (郭光灿)   

  1. Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China
  • Received:2015-03-24 Revised:2015-06-18 Online:2015-10-05 Published:2015-10-05
  • Contact: Zou Xu-Bo E-mail:xbz@ustc.edu.cn

摘要:

We propose a scheme for purification of a general mixed entangled state. In this scheme, we start from a large number of general mixed entangled states and end up, after local operation and classical communication, with a smaller number of Bell diagonal states with higher entanglement. In particular, the scheme can purify one maximally entangled state from two entangled pairs prepared in a class of mixed entangled state. Furthermore we propose a linear optical implementation of the present scheme with polarization beam splitters and photon detectors.

关键词: entanglement, purifying, optical implementation

Abstract:

We propose a scheme for purification of a general mixed entangled state. In this scheme, we start from a large number of general mixed entangled states and end up, after local operation and classical communication, with a smaller number of Bell diagonal states with higher entanglement. In particular, the scheme can purify one maximally entangled state from two entangled pairs prepared in a class of mixed entangled state. Furthermore we propose a linear optical implementation of the present scheme with polarization beam splitters and photon detectors.

Key words: entanglement, purifying, optical implementation

中图分类号:  (Quantum information)

  • 03.67.-a
03.65.Ta (Foundations of quantum mechanics; measurement theory) 42.50.-p (Quantum optics)