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Teleporting a Superposition State of Squeezed Vacuum States via Caving Quantum Electrodynamics

Cai Xinhua

Published Jan 1, 2003• 0 citations
OpenAlex

Abstract

A scheme on the quantum teleportation of an arbitrary coherent superposition state of two equal-amplitude and opposite-phase suqeezed vacuum states is proposed.It is realized via a dispersive atom-cavity field interaction and Bell-states measurement.Maximally entangled squeezed vacuum state is used as quantum channel for realizing the teleportation scheme.It is shown that the successful probability of this teleportation scheme is 0.5.

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Journal of Atomic and Molecular Physics•Jan 1, 2011•0 citations
A scheme on the quantum teleportation of an arbitrary coherent superposition state of two equal-amplitude and opposite-phase suqeezed vacuum states is proposed.It is realized via a dispersive atom-cavity field interaction and Bell-states measurement.Maximally entangled squeezed vacuum state is used as quantum channel for realizing the teleportation scheme.It is shown that the successful probability of this teleportation scheme is 0.5.
This paper proposes a scheme for teleporting an arbitrary coherent superposition state of two equal-amplitude and opposite-phase squeezed vacuum states (SVS) via a symmetric 50/50 beam splitter and photodetectors. It is shown that the quantum teleportation scheme has the successful probability 1/4. Maximally entangled SVS's are used as quantum channel for realizing the teleportation scheme. It is shown that if an initial quantum channel is in a pure but not maximally entangled SVS, the quantum channel may be distilled to a maximally entangled SVS through entanglement concentration.
We propose a scheme for the teleportation of an unknown two-particle entangled EPR state without the Bell-state measurement.Alice needs to teleport an unknown two-particle EPR state to Bob.Her atoms and Bob's are prepared in the maximal entangled GHZ state,which forms the quantum channel.She sends two atoms through a single-mode cavity field,and drives them by a strong classical field at the same time.Throngh the interaction between the atoms and the cavity,the states of these atoms are evolved.After the interaction,Alice realizes the teleportation successfully.In the scheme,the effects of thermal field and cavity decay are all eliminated.The success probability is 1.0,and the fidelity is 1.0 too.
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.