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Title: Entanglement purification and concentration of electron-spin entangled states using quantum-dot spins in optical microcavities

Abstract

We present an entanglement purification protocol and an entanglement concentration protocol for electron-spin entangled states, resorting to quantum-dot spin and optical-microcavity-coupled systems. The parity-check gates (PCGs) constructed by the cavity-spin-coupling system provide a different method for the entanglement purification of electron-spin entangled states. This protocol can efficiently purify an electron ensemble in a mixed entangled state. The PCGs can also concentrate electron-spin pairs in less-entangled pure states efficiently. The proposed methods are more flexible as only single-photon detection and single-electron detection are needed.

Authors:
 [1];  [2];  [2]; ;  [1];  [2]
  1. School of Science, Beijing University of Posts and Telecommunications, Beijing 100876 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22068652
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: Syrian Arab Republic; Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CAVITIES; COUPLING; ELECTRON DETECTION; ELECTRONS; PARITY; PHOTONS; PURE STATES; QUANTUM DOTS; QUANTUM ENTANGLEMENT; SPIN

Citation Formats

Wang Chuan, Key Laboratory of Optical Communication and Lightwave Technologies, Beijing University of Posts and Telecommunications, Beijing 100876, Department of Physics, Tsinghua University, Beijing 100084, Zhang Yong, Jin Guangsheng, and Key Laboratory of Optical Communication and Lightwave Technologies, Beijing University of Posts and Telecommunications, Beijing 100876. Entanglement purification and concentration of electron-spin entangled states using quantum-dot spins in optical microcavities. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.032307.
Wang Chuan, Key Laboratory of Optical Communication and Lightwave Technologies, Beijing University of Posts and Telecommunications, Beijing 100876, Department of Physics, Tsinghua University, Beijing 100084, Zhang Yong, Jin Guangsheng, & Key Laboratory of Optical Communication and Lightwave Technologies, Beijing University of Posts and Telecommunications, Beijing 100876. Entanglement purification and concentration of electron-spin entangled states using quantum-dot spins in optical microcavities. United States. doi:10.1103/PHYSREVA.84.032307.
Wang Chuan, Key Laboratory of Optical Communication and Lightwave Technologies, Beijing University of Posts and Telecommunications, Beijing 100876, Department of Physics, Tsinghua University, Beijing 100084, Zhang Yong, Jin Guangsheng, and Key Laboratory of Optical Communication and Lightwave Technologies, Beijing University of Posts and Telecommunications, Beijing 100876. Thu . "Entanglement purification and concentration of electron-spin entangled states using quantum-dot spins in optical microcavities". United States. doi:10.1103/PHYSREVA.84.032307.
@article{osti_22068652,
title = {Entanglement purification and concentration of electron-spin entangled states using quantum-dot spins in optical microcavities},
author = {Wang Chuan and Key Laboratory of Optical Communication and Lightwave Technologies, Beijing University of Posts and Telecommunications, Beijing 100876 and Department of Physics, Tsinghua University, Beijing 100084 and Zhang Yong and Jin Guangsheng and Key Laboratory of Optical Communication and Lightwave Technologies, Beijing University of Posts and Telecommunications, Beijing 100876},
abstractNote = {We present an entanglement purification protocol and an entanglement concentration protocol for electron-spin entangled states, resorting to quantum-dot spin and optical-microcavity-coupled systems. The parity-check gates (PCGs) constructed by the cavity-spin-coupling system provide a different method for the entanglement purification of electron-spin entangled states. This protocol can efficiently purify an electron ensemble in a mixed entangled state. The PCGs can also concentrate electron-spin pairs in less-entangled pure states efficiently. The proposed methods are more flexible as only single-photon detection and single-electron detection are needed.},
doi = {10.1103/PHYSREVA.84.032307},
journal = {Physical Review. A},
issn = {1050-2947},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}