Teleporting an unknown state

Bao‐Sen Shi, Akihisa Tomita

Liu Zong-Liang, Shaohua Li, Changyong Chen

We propose a scheme for approximately and conditionally teleporting an unknown atomic-entangled state in dissipative cavity QED. It is the further development of the scheme of [Phys. Rev. A 69 (2004) 064302], where the cavity mode decay has not been considered and the state teleportated is an unknown atomic state. In this paper, we investigate the influence of the decay on the approximate and conditional teleportation of the unknown atomic-entangled state, which is different from that teleportated in [Phys. Rev. A 69 (2004) 064302] and then give the fidelity of the teleportation, which depends on the cavity mode decay. The scheme may be generalized to not only the teleportation of the cavity-mode-entangled-state by means of a single atom but also the teleportation of the unknown trapped-ion-entangled-state in a linear ion trap.

Li Dong

A representation of an N-particle arbitrary and unknown state is proposed.As an application,a scheme for teleporting an N-particle unknown state via the product state of W states is investigated.The teleportation scheme of an N-particle unknown state can be realized by Alice's Bell-state measurements and Bob's computation basis measurements and unitary transformations with the probability of the successful teleportation(2/3)~N.

Bettina Just

Xie Li-Jun

A scheme for controlled teleportation of an unknown one-qubit quantum state is presented,which utilize a Smolin state as quantum channel.By employing a 2(n+1)-qubit Smolin states,the scheme can be used to teleport an unknown one-qubit quantum state via the control of n parties.In addition,and this scheme can be directly generalized to teleport an unknown one-qudit quantum sate.

Ray LaPierre