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Acta Sinica Quantum Optica

The Scheme for the Teleportation of an Arbitrary Two-atom State in Driven Cavity QED

Tang-Kun Liu

Published Jan 1, 2008• 0 citations
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Abstract

A scheme for the teleportation of an arbitrary two-atom state in driven cavity QED has been proposed.In the teleportation,the maximally two-atom entangled state is required as the quantum channel.The scheme does not require direct Bell-state measurement,but contains Bell-state measurement and is insensitive to the cavity decay and thermal field.Meanwhile,the scheme can also be used to the teleportation of unknown three-atom GHZ state,the probability of the success in the teleportation is 1.0.

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Acta Sinica Quantum Optica•Jan 1, 2006•0 citations
A scheme for the teleportation of an arbitrary two-atom state in driven cavity QED has been proposed.In the teleportation,the maximally two-atom entangled state is required as the quantum channel.The scheme does not require direct Bell-state measurement,but contains Bell-state measurement and is insensitive to the cavity decay and thermal field.Meanwhile,the scheme can also be used to the teleportation of unknown three-atom GHZ state,the probability of the success in the teleportation is 1.0.
We propose a scheme for the teleportation of an arbitrary two-atom entangled state |ϕ〉12 = a|gg〉12 + b|ge〉12 + c|eg〉12 + d|ee〉12 in driven QED. Two pairs of maximally two-atom entangled state are required as the quantum channel. This scheme does not involve apparent (or direct) Bell-state measurement and is insensitive to the cavity decay and the thermal field. Meanwhile this approach can be used to teleport the unknown multipartite GHZ state. The probability of success in our scheme can reach 1.0.
We propose a scheme for controlled teleportion of an arbitrary two-atom state in cavity QED. In the scheme a GHZ state and an EPR pair are chosen as quantum channels. The sender can teleport quantum information to the receiver with the help of the controller. In the teleportation process two pairs of atoms interact respectively with two identical single-mode cavities; meanwhile, the two pairs of atoms are respectively driven by two identical classical fields. The scheme is insensitive to the cavity decay and thermal field and the success probability is 1.0.
We present a scheme for realizing probabilistic teleportation of an unknown N -atom state via cavity QED. This scheme requires only a nonmaximally entangled pair to be used as a quantum channel, so the requirement of entanglement is reduced. In addition, our scheme does not involve the Bell-state measurement and is insensitive to the cavity decay, which is important from the experimental point of view. If the quantum channel is a two-atom maximally entangled state, teleportation of an unknown N -atom state can be realized by a simpler scheme via cavity QED.
We propose a scheme for the teleportation of an unknown two-particle entangled EPR state without the Bell-state measurement.Alice needs to teleport an unknown two-particle EPR state to Bob.Her atoms and Bob's are prepared in the maximal entangled GHZ state,which forms the quantum channel.She sends two atoms through a single-mode cavity field,and drives them by a strong classical field at the same time.Throngh the interaction between the atoms and the cavity,the states of these atoms are evolved.After the interaction,Alice realizes the teleportation successfully.In the scheme,the effects of thermal field and cavity decay are all eliminated.The success probability is 1.0,and the fidelity is 1.0 too.