One-step deterministic generation of N-atom Greenberger–Horne–Zeilinger states in separate coupled cavities via quantum Zeno dynamics

Abstract

We propose an efficient scheme for deterministic generating $N$-atom Greenberger–Horne–Zeilinger (GHZ) states in separate coupled cavities connected by optical fibers based on quantum Zeno dynamics only by one-step manipulation. Firstly, we discuss the generation of three-atom GHZ states in separate cavities. Then, the scheme is directly generalized to $N$-atom case without increasing new operations in experiment. The influence of decoherence induced by atomic spontaneous emission and the fibers and cavities losses is discussed by numerical calculation. The results show that the scheme is insensitive to the optical fibers decay due to a tiny excitation probability of the optical fibers during the operation.

Keywords:

• quantum Zeno dynamics
• Greenberger–Horne–Zeilinger state
• coupled cavity

Notes

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [grant number 11105030], [grant number 11374054]; the Foundation of Ministry of Education of China [grant number 212085]; the Major State Basic Research Development Program of China [grant number 2012CB921601].