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Optoelectronics Letters

Generation of four-photon GHZ states based on interaction between a four-level atom and two bimodal cavities

Deng-Yu Zhang, Shi-Qing Tang, Xin-Wen Wang, Xie Li-Jun, Zhan Xiao-Gui, Yinhua Chen

Published Mar 1, 2012• 2 citations
Publisher
DOI
10.1007/s11801-012-1053-z

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A scheme is presented for generating four-photon Greenberger-Hornc-Zeilinger(GHZ) states with resonant interaction between a cascade type three-level atom and two bimodal cavities.In the proposed protocol,the quantuni information is encoded on Fock states of the cavity fields.Schrodinger equation of the system is solved and quantum states of interaction system are obtained.The detection of atom can collapse cavity to the desired GHZ state.It is shown that the scheme is simple and the experimental implementation is feasible.
A simple scheme is presented for generating four-photon Greenberger-Horne-Zeilinger states with a large detuned interaction between a three-level atom and two bimodal cavities. In the proposed protocol, the quantum information is encoded on Fock states of the cavity-fields, and the atomic spontaneous emission can be effectively suppressed due to the fact that the excited state of the atom is adiabatically eliminated under the large detuning condition. The detection of the atom can collapse the cavity to the desired state. The experimental feasibility of our proposal is also discussed.