Toward demonstrating controlled-X operation based on continuous-variable four-partite cluster states and quantum teleporters

Yu Wang, Xiaolong Su, Heng Shen, Aihong Tan, Changde Xie, and Kunchi Peng
Phys. Rev. A 81, 022311 – Published 12 February 2010

Abstract

One-way quantum computation based on measurement and multipartite cluster entanglement offers the ability to perform a variety of unitary operations only through different choices of measurement bases. Here we present an experimental study toward demonstrating the controlled-X operation, a two-mode gate in which continuous variable (CV) four-partite cluster states of optical modes are utilized. Two quantum teleportation elements are used for achieving the gate operation of the quantum state transformation from input target and control states to output states. By means of the optical cluster state prepared off-line, the homodyne detection and electronic feeding forward, the information carried by the input control state is transformed to the output target state. The presented scheme of the controlled-X operation based on teleportation can be implemented nonlocally and deterministically. The distortion of the quantum information resulting from the imperfect cluster entanglement is estimated with the fidelity.

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  • Received 8 December 2009

DOI:https://doi.org/10.1103/PhysRevA.81.022311

©2010 American Physical Society

Authors & Affiliations

Yu Wang, Xiaolong Su*, Heng Shen, Aihong Tan, Changde Xie, and Kunchi Peng

  • State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan, 030006, People's Republic of China

  • *suxl@sxu.edu.cn

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Vol. 81, Iss. 2 — February 2010

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