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Journal of Atomic and Molecular Physics

Diverting entanglement via two-level atom interacting with caving fields

Cai Xin

Published Jan 1, 2009• 0 citations
OpenAlex

Abstract

Base on the dispersive atom-cavity field interaction,the scheme for preparing the entangled coherent state is discussed.An experimentally feasible protocol for realizing entanglement diversion of the entangled coherent states by using a two-level atom interacting with caving fields is proposed.In this scheme,the entanglement between two coherent states,|α〉and|-α〉,with the same amplitude but a phase differenceπis utilized as the quantum channel.The process of the entanglement diversion is implemented by using the two-level atom interacting with caving fields,two-modes orthogonal states measurement and with the help of classical information.With the present development of cavity quantum electrodynamics (QED) techniques,the scheme can be achieved.

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ACTA PHOTONICA SINICA•Jan 1, 2008•0 citations
Base on the dispersive atom-cavity field interaction,the scheme for preparing the entangled coherent state is discussed.An experimentally feasible protocol for realizing entanglement diversion of the entangled coherent states by using a two-level atom interacting with caving fields is proposed.In this scheme,the entanglement between two coherent states,|α〉and|-α〉,with the same amplitude but a phase differenceπis utilized as the quantum channel.The process of the entanglement diversion is implemented by using the two-level atom interacting with caving fields,two-modes orthogonal states measurement and with the help of classical information.With the present development of cavity quantum electrodynamics (QED) techniques,the scheme can be achieved.
Base on the dispersive atom-cavity field interaction, the scheme for preparing the entangled coherent state is discussed. An experimentally feasible protocol for realizing entanglement concentration of the entangled coherent states by using a two-level atom interacting with caving fields is proposed. In this protocol, the entanglement between two coherent states, and , with the same amplitude but a phase difference is utilized as the quantum communication channel. The process of the entanglement concentration is implemented by using a two-level atom interacting with caving fields and two-modes orthogonal states measurement. With the present development of cavity quantum electrodynamics (QED) techniques, the scheme can be achieved.
Base on the dispersive atom-cavity field interaction,the scheme for preparing the entangled squeezed state is discussed.An experimentally feasible protocol for realizing entanglement concentration of the entangled squeezed states by using a two-level atom interacting with caving fields is proposed.In this protocol,the entanglement between two squeezed states,|ξand |-ξ,with the same amplitude but a phase difference π is utilized as the quantum channel.The process of the entanglement concentration is implemented by using a two-level atom interacting with caving fields and two-mode orthogonal states measurement.With the present development of cavity quantum electrodynamics(QED)techniques, the scheme can be achieved.
In the context of cavity quantum electrodynamics (QED),a potential scheme is proposed to generate entangled coherent states. The scheme includes twice interactions of two-level atoms with cavities. In the first interaction,two atoms are sent into a microwave cavity with the large detuning respectively. And then the second interaction is that the two atoms enter another microwave cavity and are driven by a resonant classical field meantime. When we choose the proper interaction time and make measurement on the two atoms,the two microwave cavity mode fields are determinatively entangled. In addition,it is easy to generalize the scheme to multi-cavity and multi-atom.
A scheme for remote preparation of a two-atom entangled state is presented, which is based on the simultaneous nonresonant interaction of atoms with a single-mode cavity field. In view of the fact that two-particle entanglement is more easily generated than three-particle entanglement, the scheme prepares a two-atom entangled state via two pairs of two-atom entangled state as the quantum channel. Let two identical atoms Alice possesses interact with a single-mode cavity field simultaneously. Alice knows the state she wants to prepare. She selects a proper interaction time, measures the states of the atoms she possesses, and informs Bob of her measurement through a classical channel. Bob introduces an identical auxiliary atom and a single-mode cavity field in vacuum state to achieve the scheme. The scheme is insensitive to the cavity field states and cavity decay. The preparation can be achieved in a simple way. Based on current cavity quantum electrodynamics technique, the scheme can be realized experimentally.