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Communications in Theoretical Physics

Teleportation of an Unknown Entangled State in Trapped Ions

Chen Mei-Feng, Ma Song-She

Published Jul 1, 2007• 2 citations
Publisher

Abstract

A scheme is presented for teleportation of an unknown entangled ionic state between ions kept in two well separated traps, which is induced by means of two dispersive laser excitations. The scheme is insensitive to the thermal motion and its successful probability can reach 1.
DOI
10.1088/0253-6102/48/1/019

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A scheme is presented for teleporting an unknown state in a trapped ion system. The scheme only requires a single laser beam. It allows the trap to be in any state with a few phonons, e.g. a thermal motion. Furthermore, it works in the regime, where the Rabi frequency of the laser is on the order of the trap frequency. Thus, the teleportation speed is greatly increased, which is important for decreasing the decoherence effect. This idea can also be used to teleport an unknown ionic entangled state.
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We present an effective scheme to teleport an unknown ionic entangled internal state via trapped ions without joint Bell-state measurement. In the constructed quantum channel process, we adopt entanglement swapping to avoid decrease of entanglement during the distribution of particles. Thus our scheme provides new prospects for quantum teleportation over longer distance. The distinct advantages of our scheme are that our scheme is insensitive to heating of vibrational mode and can be generalized to teleport an N -ion electronic entangled GHZ class state. Furthermore, in our scheme the success probability can reach 1.
A scheme is presented for generating entangled states of the W\mathrm{W}W type for trapped ions in thermal motion. In the scheme the ions are simultaneously excited by a laser. Our scheme is insensitive to both the initial motional state and heating as long as the system remains in the Lamb-Dicke regime.