Universal Greenberger-Horne-Zeilinger-state analyzer based on two-photon polarization parity detection

Jun Qian, Xun-Li Feng, and Shang-Qing Gong

Phys. Rev. A 72, 052308 – Published 8 November 2005

Abstract

We present a universal analyzer for the three-particle Greenberger-Horne-Zeilinger (GHZ) states with quantum nondemolition parity detectors and linear-optics elements. In our scheme, all of the three-photon GHZ states can be discriminated with nearly unity probability in the regime of weak nonlinearity feasible at the present state of the art experimentally. We also show that our scheme can be easily extended to the analysis of the multi-particle GHZ states.

Received 22 July 2005

DOI:https://doi.org/10.1103/PhysRevA.72.052308

Authors & Affiliations

Jun Qian^1,2, Xun-Li Feng^1,3, and Shang-Qing Gong^4,1,*

¹State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
²Graduate School of the Chinese Academy of Sciences, Beijing 100039, China
³Department of Physics, Blk S12, National University of Singapore 2, Science Drive 3, Singapore 117542
⁴CCAST (World Laboratory), P. O. Box 8730, Beijing 100080, China

^*Corresponding author. Email address: sqgong@mail.siom.ac.cn

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Vol. 72, Iss. 5 — November 2005

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