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Chinese Journal of Quantum Electronics

Transfer of quantum information between two-level atoms and cavity fields of coherent states

Li Jun

Published Jan 1, 2008• 0 citations
OpenAlex

Abstract

A scheme for quantum information transfer is proposed based on the large-detuned interaction between atom and cavity field.In this scheme the quantum information can be transferred into each other between an atom and a cavity field,many entangled atoms and a cavity field,many atoms and many cavity fields respectively.

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Fuzhou daxue xuebao. Ziran kexue ban•Jan 1, 2008•0 citations
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.
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.
In this paper, we propose a scheme for transferring an unknown atomic entangled state via cavity quantum electrodynamics (QED). This scheme, which has a successful probability of 100 percent, does not require Bell-state measurement and performing any operations to reconstruct an initial state. Meanwhile, the scheme only involves atom–field interaction with a large detuning and does not require the transfer of quantum information between the atoms and cavity. Thus the scheme is insensitive to the cavity field states and cavity decay. This scheme can also be extended to transferring an entangled state of n-atom.
A scheme is proposed for transferring two-atom entangled state and W state.It is based on the simultaneous nonresonant interaction of two atoms with a single-mode cavity field.During the transferring process,the atoms do not transfer quantum information with the cavity.The cavity is only virtually excited and thus the requirement on the quality factor of the cavity is greatly loosened.Atomic entangled state can be directly transferred to the atoms of receiver without performing any measurement.The successful probability is 100 percent.