Faithful quantum entanglement sharing based on linear optics with additional qubits
Li Xi-Han(李熙涵)a)b)c), Duan Xiao-Jiao(段晓礁)a)b)c), Sheng Yu-Bo(盛宇波)a)b)c), Zhou Hong-Yu(周宏余)a)b)c), and Deng Fu-Guo(邓富国)a)c)d)†
a The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875, China; b Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875, Chinac Beijing Radiation Center, Beijing 100875, Chinad Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing 100875, China
Abstract This paper presents a scheme for faithfully distributing a pure entanglement between two parties over an arbitrary collective-noise channel with linear optics. The transmission is assisted by an additional qubit against collective noise. The receiver can take advantage of the time discrimination and the measurement results of the assistant qubit to reconstruct a pure entanglement with the sender. Although the scheme succeeds probabilistically, the resource used to get a pure entanglement state is finite, and so is easier to establish entanglement in practice than quantum entanglement purification.
Received: 10 December 2008
Revised: 08 January 2009
Accepted manuscript online:
(Quantum computation architectures and implementations)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10604008), Foundation
for the Author of National Excellent Doctoral Dissertation of China
(Grant No 200723), and
Beijing Natural Science Foundation (Grant No 1082008).
Cite this article:
Li Xi-Han(李熙涵), Duan Xiao-Jiao(段晓礁), Sheng Yu-Bo(盛宇波), Zhou Hong-Yu(周宏余), and Deng Fu-Guo(邓富国) Faithful quantum entanglement sharing based on linear optics with additional qubits 2009 Chin. Phys. B 18 3710
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