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Chinese Physics Letters

Quantum Logic Network for Cloning a State Near a Given One Based on Cavity QED

Dawei Zhang, Shao Xiao-Qiang, Ai‐Dong Zhu

Published May 29, 2008• 3 citations
Publisher

Abstract

A quantum logic network is constructed to simulate a cloning machine which copies states near a given one. Meanwhile, a scheme for implementing this cloning network based on the technique of cavity quantum electrodynamics (QED) is presented. It is easy to implement this network of cloning machine in the framework of cavity QED and feasible in the experiment.

DOI
10.1088/0256-307x/25/6/009

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A quantum logic network is constructed to simulate a cloning machine which copies states near a given one. Meanwhile, a scheme for implementing this cloning network based on the technique of cavity quantum electrodynamics (QED) is presented. It is easy to implement this network of cloning machine in the framework of cavity QED and feasible in the experiment.
We present a scheme to implement a quantum cloning machine which copies a state near a given one with superconducting quantum-interference device(SQUID) embedded in a high-Q cavity.The controlled-NOT operations derived in our scheme are indispensable for the preparation of this cloning machine,which can be implemented by adjusting the interaction between the SQUID and the microwave cavity.Due to the technology of SQUID can be easily implemented in current experiment,our scheme also can be realized in experiment.
We propose an implementation of an universal quantum cloning machine [UQCM, V. Buzek and M. Hillery, Phys. Rev. A 54, 1844 (1996)] in a cavity quantum electrodynamics experiment. This UQCM acts on the electronic states of atoms that interact with the electromagnetic field of a high-QQQ cavity. We discuss here the specific case of the $\stackrel{\ensuremath{\rightarrow}}{1}2$ cloning process using either a one- or a two-cavity configuration.