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Chinese Physics Letters

Practical Protocol for Telecloning Quantum States

Tan Jia, Mao-Fa Fang

Published Jan 30, 2006• 7 citations
Publisher

Abstract

We describe a protocol for telecloning a quantum state to M distant users via an ( M +1)-particle W state. In the scheme, two atoms interact simultaneously with a highly detuned cavity mode with the assistance of a classical field. The scheme is insensitive to the cavity decay and the thermal field. Moreover, the Bell-state measurement can be achieved by detecting two atoms separately. Thus telecloning can be realized in a simple way.

DOI
10.1088/0256-307x/23/2/003

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We describe a protocol for telecloning a quantum state to M distant users via an ( M +1)-particle W state. In the scheme, two atoms interact simultaneously with a highly detuned cavity mode with the assistance of a classical field. The scheme is insensitive to the cavity decay and the thermal field. Moreover, the Bell-state measurement can be achieved by detecting two atoms separately. Thus telecloning can be realized in a simple way.
A scheme for the distant transfer of a qubit atomic state and atomic entangled states are presented.In the scheme,the identical two-level atoms interact simultaneously with a highly detuned cavity mode and are driven by a strong classical field,and the atomic state evolution is independent of cavity field state.Thus the scheme is insensitive to both the cavity decay and the thermal field and the requirement on the quality factor of the cavity is greatly loosened, which is of importance from the experimental point of view.
A scheme for telecloning without the Bell-state measurement on cavity QED is proposed.The present protocol is based on the resonance of the atoms and the cavity mode.The advantages of the proposal are mainly as follows.One is that the required time for the whole procedure is short due to the resonance. The other one is that we need no any single-qubit rotating operation on the atoms,which makes the experimental setup simple.Furthermore,the present scheme is feasible based on currently available technologies.
We propose a scheme to implement the optimal symmetric 1 → 2 universal quantum telecloning through cavity-assisted interaction. In our scheme, an arbitrary single atomic state can be telecloned to two single atomic states. And three atoms are trapped in three spatially separated cavities respectively. With a particular multiparticle entangled state acting as a quantum information channel and the trapped single atom acting as a quantum network node for its long-lived internal state, quantum information can be telecloned among nodes and can stored in the nodes.