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Communications in Theoretical Physics

Transferring of a Two-Mode Entangled State Between Two Cavities via Cavity QED

Tao Wu, NI Zhi-xiang, Ye Liu

Published Mar 1, 2007• 1 citation
Publisher

Abstract

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.

DOI
10.1088/0253-6102/47/3/014

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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.
An alternative scheme is proposed to transfer quantum states and prepare a quantum network in cavity QED. It is based on the interaction of a two-mode cavity field with a three-level ∨-type atom. In the scheme, the atom-cavity field interaction is resonant, thus the time required to complete the quantum state transfer process is greatly shortened, which is very important in view of decoherence. Moreover, the present scheme does not require one mode of the cavities to be initially prepared in one-photon state, thus it is more experimentally feasible than the previous ones.
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.