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Quantum computation in a decoherence-free subspace with superconducting devices

  • Z.-Y. XueEmail author
  • S. L. Zhu
  • Z. D. Wang
Quantum Information

Abstract

We propose a scheme to implement quantum computation in decoherence-free subspace with superconducting devices inside a cavity by unconventional geometric manipulation. Universal single-qubit gates in encoded qubit can be achieved with cavity assisted interaction. A measurement-based two-qubit Controlled-Not gate is produced with parity measurements assisted by an auxiliary superconducting device and followed by prescribed single-qubit gates. The measurement of currents on two parallel devices can realize a projective measurement, which is equivalent to the parity measurement on the involved devices.

PACS

03.67.Lx Quantum computation architectures and implementations 42.50.Dv Quantum state engineering and measurements 85.25.Cp Josephson devices 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.Department of Physics and Center of Theoretical and Computational PhysicsThe University of Hong KongHong KongP.R. China
  2. 2.Laboratory of Quantum Information Technology, ICMP and SPTE, South China Normal UniversityGuangzhouP.R. China

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