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Journal of Optics B Quantum and Semiclassical Optics

Remote state preparation of an entangled state

Bao‐Sen Shi, Akihisa Tomita

Published Oct 17, 2002• 84 citations
Publisher

Abstract

In this paper, we give a scheme for the remote state preparation of a chosen two-particle entangled state by a three-particle Greenberger–Horne–Zeilinger state, and propose a generalization to a chosen multiparticle entangled state. By this scheme, only one classical bit and one single-particle projective measurement are enough for the remote state preparation of some special chosen multiparticle entangled states.

DOI
10.1088/1464-4266/4/6/302

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We present two schemes for realizing the remote preparation of a Greenberger–Horne–Zeilinger (GHZ) state. The first scheme is to remotely prepare a general N -particle GHZ state with two steps. One is to prepare a qubit state by using finite classical bits from sender to receiver via a two-particle entangled state, and the other is that the receiver introduces N — 1 additional particles and performs N — 1 controlled-not (C-Not) operations. The second scheme is to remotely prepare an N -atom GHZ state via a two-atom entangled state in cavity quantum electrodynamics (QED). The two schemes require only a two-particle entangled state used as a quantum channel, so we reduce the requirement for entanglement.