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Chinese Physics

Probabilistic remote preparation of a two-atom entangled state

Ying-Qiao Zhang, Jin Xing-Ri, Zhang Shou

Published Aug 25, 2005• 24 citations
Publisher

Abstract

A scheme for remotely preparing a two-atom entangled state via entanglement swapping in cavity quantum electronic dynamics (QED) with the help of separate measurements is proposed. And the effect of cavity decay is eliminated in our scheme.
DOI
10.1088/1009-1963/14/9/008

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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.
Abstract A physical protocol for joint preparation of a single atomic qubit state remotely in the context of an atom system from two senders and one receiver spatially separated is proposed. A triatomic entangled W-type state is used as the quantum channel, and the control of the state of a single two-level atom can be achieved by the interaction of the atom and the classical field. We show that the joint remote state preparation of an atomic single qubit can be successful in a probabilistic manner under the condition that the classical information of the single-qubit state is split in the correct way.