A simple scheme for realizing four-photon GHZ state based on cavity quantum electrodynamics

张登玉, 唐世清, 汪新文 +4 more

Chen Yin-hna

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.

S. Brattke, Gerhard R. Guthöhrlein, Matthias Keller +3 more

Wang Jun, Longbao Yu, Ye Liu

This paper proposes a simple scheme for generating a three-atom GHZ state via cavity quantum electrodynamics (QED). The task can be achieved through the interaction between two EPR states, which can be prepared easily with current technology. In this scheme, the cavity field is only virtually excited during the interaction process, and no quantum information transfer between the atoms and the cavity is required. Thus it greatly prolongs the efficient decoherent time. Moreover, this scheme is also applicable for generating an N -atom GHZ state.

Deng-Yu Zhang, Shi-Qing Tang, Xin-Wen Wang +1 more

A simple scheme is presented for generating six-photon entangled state with resonant interaction between a cascade type four-level atom and two three-mode cavities. In the proposed protocol, the quantum information is encoded on Fock states of the cavity fields. We solve Schrödinger equation and obtain quantum states of interaction system. The detection of the atom can collapse the cavity to the desired six-photon entangled state.

S. Haroche, Auffeves, Meunier +5 more