Full protection of superconducting qubit systems from coupling errors

Details Full protection of superconducting qubit systems from coupling errors Full protection of superconducting qubit systems from coupling errors

2004-07-29

arxiv.org/abs/cond-mat/0407780v3

Phys. Rev. B 72, 064511 (2005)

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure

Scientific paper

10.1103/PhysRevB.72.064511

Solid state qubits realized in superconducting circuits are potentially extremely scalable. However, strong decoherence may be transferred to the qubits by various elements of the circuits that couple individual qubits, particularly when coupling is implemented over long distances. We propose here an encoding that provides full protection against errors originating from these coupling elements, for a chain of superconducting qubits with a nearest neighbor anisotropic XY-interaction. The encoding is also seen to provide partial protection against errors deriving from general electronic noise.

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