Quantum computation in decoherence-free subspace with superconducting devices

Details Quantum computation in decoherence-free subspace with superconducting devices Quantum computation in decoherence-free subspace with superconducting devices

2008-06-04

arxiv.org/abs/0806.0753v3

Eur. Phys. J. D 55, 223 (2009)

Physics

Quantum Physics

v2: thoroughly rewritten version with title and motivation changed; v3: published version with detail dirivations

Scientific paper

10.1140/epjd/e2009-00224-4

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.

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