Journal article

Computation with coherent states via teleportations to and from a quantum bus

Marcus Silva, Casey R Myers

PHYSICAL REVIEW A | AMER PHYSICAL SOC | Published : 2008

Abstract

In this paper, we present results illustrating the power and flexibility of one-bit teleportations in quantum bus computation. We first show a scheme to perform a universal set of gates on continuous variable modes, which we call a quantum bus or qubus, using controlled phase-space rotations, homodyne detection, ancilla qubits, and single-qubit measurement. Within our comparison criteria, the resource usage for this scheme is lower than any previous scheme to date. We then illustrate how one-bit teleportations into a qubus can be used to encode qubit states into a quantum repetition code, which in turn can be used as an efficient method for producing Greenberger-Horne-Zeilinger states that c..

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Grants

Funding Acknowledgements

We would like to thank T. C. Ralph, K. Nemoto, and W. J. Munro for valuable discussions. We are supported in part by NSERC, ARO, CIAR, MITACS, and MEXT in Japan. C. R. M. would like to thank Mike and Ophelia Lazaridis for financial support. M. S. would like to thank the Bell family for financial support.