One-step synthesis of multiatom Greenberger-Horne-Zeilinger states.
A scheme is proposed for generating maximally entangled Greenberger-Horne-Zeilinger (GHZ) atomic states for testing quantum nonlocality. In the scheme, three atoms are simultaneously sent through a nonresonant cavity in a vacuum state. They are initially in the same state, and thus there is no energy exchange in the process. The cavity-assisted collision results in a phase-shift which depends upon the collective atomic excitations. In principle, the scheme can be generalized to generate N-atom GHZ states. The scheme is insensitive to cavity decay and requires only one cavity, providing new prospects for testing fundamental aspects of quantum mechanics and for quantum information processing.
Zheng
S B
SB
Department of Electronic Science and Applied Physics, Fuzhou University, Fuzhou 350002, People's Republic of China. sbzheng@pub5.fz.fj.cn