High efficient scheme for remote state preparation with cavity QED

Jianping Li

Xiao-Qi Xiao, Junfang Xiao, Yuan Ren +3 more

Pengfei Duan, Wei-Long Duan, Qiong-Si Fu +2 more

肖骁琦 Xiao Xiaoqi, 杨联华 Yang Lianhua

Li Deng, Ai-Xi Chen, Xu Yan-Qiu

In this paper, a scheme is proposed for remote state preparation (RSP) with cavity quantum electrodynamics (QED). In our scheme, two observers share two-atom nonmaximally entangled state as quantum channels and can realize remote preparation of state of an atom. We also propose a generalization for remote preparation of N -atom entangled state by ( N +1)-atom GHZ-like state ( N ≥ 2). By this scheme, one single-atom projective measurement is enough for the RSP of a qubit or N -atom entangled state, and the probability of success for RSP is unity. Furthermore, we have considered the case where observers use W-like state as quantum channels to realize RSP of a qubit. We compare our scheme with existing ones.

Wang Xue-Wen, Peng Zhao-Hui

In this paper we present a remote state preparation scheme with a three-qubit W -class state in cavity QED. It has been shown that a special single-qubit state and a special two-qubit entangled state can be remotely prepared perfectly. Furthermore, the classical information cost in this scheme is less than that in the corresponding teleportation scheme and only a single-qubit projective measurement is made by the sender. We also generalize this idea to the multiqubit W -class state.