Chin. Phys. Lett.  2010, Vol. 27 Issue (4): 040307    DOI: 10.1088/0256-307X/27/4/040307
GENERAL |
Preparation of Arbitrary Four-Qubit W State with Atomic Ensembles via Rydberg Blockade

HAN Yang, WU Chun-Wang, GAO Ming, LIANG Lin-Mei, CHEN Ping-Xing, LI Cheng-Zu

College of Science, National University of Defense Technology,Changsha 410073
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HAN Yang, WU Chun-Wang, GAO Ming et al  2010 Chin. Phys. Lett. 27 040307
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Abstract

The generation of various entangled states is an essential task in quantum information processing. Recently, a scheme (PRA 79, 022304) has been suggested for generating Greenberger-Horne-Zeilinger state and cluster state with atomic ensembles based on the Rydberg blockade. Using similar resources as the earlier scheme, here we propose an experimentally feasible scheme of preparing arbitrary four-qubit W class of maximally and non-maximally entangled states with atomic ensembles in a single step. Moreover, we carefully analyze the realistic noises and predict that four-qubit W states can be produced with high fidelity (F~0.994) via our scheme.

Keywords: 03.67.-a      03.65.Ud      42.50.Gy     
Received: 14 September 2009      Published: 27 March 2010
PACS:  03.67.-a (Quantum information)  
  03.65.Ud (Entanglement and quantum nonlocality)  
  42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/27/4/040307       OR      https://cpl.iphy.ac.cn/Y2010/V27/I4/040307
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HAN Yang
WU Chun-Wang
GAO Ming
LIANG Lin-Mei
CHEN Ping-Xing
LI Cheng-Zu
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