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Communications in Theoretical Physics

A Feasible Scheme for Teleportation of Multi-atom Cat-like States in Thermal Cavities

Xin-Wen Wang, Liu Xiang

Published Apr 1, 2006• 5 citations
Publisher

Abstract

An experimentally feasible scheme for implementing teleportation of multi-atom cat-like states in cavity QED is proposed. In the scheme the 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, which is of importance from the experimental point of view. All the orthogonal and complete multi-atom GHZ states can be exactly distinguished only by one step, so our scheme can also be used for other purposes such as dense coding using multi-atom GHZ states as quantum channels.

DOI
10.1088/0253-6102/45/4/012

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An experimentally feasible scheme for implementing teleportation of multi-atom cat-like states in cavity QED is proposed. In the scheme the 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, which is of importance from the experimental point of view. All the orthogonal and complete multi-atom GHZ states can be exactly distinguished only by one step, so our scheme can also be used for other purposes such as dense coding using multi-atom GHZ states as quantum channels.
We propose an experimentally feasible scheme for implementing quantum dense coding in cavity QED. In this scheme, the multi-atoms interact simultaneously with a highly detuned cavity mode, and are driven by a strong classical field. The scheme is insensitive to the cavity decay and the thermal field. Only one interaction between atoms and cavity is required. Multi-atom's GHZ-states can be exactly distinguished via detecting the atomic state, and the quantum dense coding can be realized in a simple way.
An experimentally feasible scheme for implementing teleportation of multi-atom cat-like states via partially entangled states is proposed.In the scheme,the probability of teleporting multi-atom cat-like is two times of square of the smaller coefficient of the superposition state serving as quantum channel,i.e.,the biggest probability of implementing teleportation with such class of entangled states.Moreover,our scheme is insensitive to cavity decay,because atoms are interacting with a large detuning vacuum cavity field.
In this paper, we present a peculiar tripartite entangled state that is inequivalent to both the GHZ state and the W state, and then propose to implement efficient quantum information processing such as quantum dense coding and teleportation with this entangled state in cavity QED. In this scheme the atoms interact with a highly detuned cavity field with the assistance of a strong classical driven field. It does not require the transfer of quantum information between the atomic system and the cavity, and then our scheme is insensitive to both the cavity decay and the thermal field.
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.