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Journal of Fuyang Teachers College

A Scheme for Transferring Quantum Information via Cavity QED

Tao Wu, Juan He, NI Zhi-xiang

Published Jan 1, 2006• 0 citations
OpenAlex

Abstract

In this paper,we propose a scheme for transferring of a two-atom product state via cavity QED.This proposal is based on atomcavity field interaction with a large detuning and does not require the transfer of quantum information between the atoms and the cavity.Thus the scheme is insensitive to cavity field states and cavity decay.In addition,the scheme does not require Bell-state measurement and the transfer of the scheme can be achieved with 100% success probability in a simple manner.And the scheme can also be extended to transfer product state of n-atom.

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In this paper,we propose a scheme for transferring of a two-atom product state via cavity QED.This proposal is based on atomcavity field interaction with a large detuning and does not require the transfer of quantum information between the atoms and the cavity.Thus the scheme is insensitive to cavity field states and cavity decay.In addition,the scheme does not require Bell-state measurement and the transfer of the scheme can be achieved with 100% success probability in a simple manner.And the scheme can also be extended to transfer product state of n-atom.
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We propose a scheme for transferring of a two-mode entanglement of zero- or one-photon entangled states between two cavities via atom-cavity field resonant interaction. In our proposal, in order to transfer the entangled state, we only need two identical two-level atoms and a two-mode cavity for receiving the teleported state. This scheme does not require Bell-state measurement and performing any transformations to reconstruct the initial state. And the transfer can occur with 100% success probability in a simple manner. And a network for transferring of a two-mode entangled state between cavities is suggested. This scheme can also be extended to transfer N -mode entangled state of cavity.
We present a scheme for transferring an unknown atomic entangled state via atom-cavity field interaction.This proposal,which has success probability of unit,is mainly employing two atoms for receiving the teleported state,and a two-mode cavity as the quantum channel.The two modes of the cavity have different frequencies and polarizations.So the two modes are distinguished by their frequencies and their orthogonal polarizations,hence they occupy distinct regions in the cavity.The atom interacts resonantly with the mode of the cavity according to the Jaynes-Cummings Hamiltonian,and when interaction between the atom and one of the two modes takes place,the other mode remains unaffected.This scheme does not require Bell-state measurement and any operations to reconstruct the initial state.This scheme can also be extended to transfer entangled state of N-atom.
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.