Quantum computation in decoherence-free subspace with superconducting devices

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.

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

References in corpus (3)

• Holonomic quantum computation in decoherence-free subspaces
• Information-Disturbance Tradeoff in Quantum State Discrimination
• Physical implementation of topologically decoherence-protected superconducting qubits