Preparation and manipulation of a fault-tolerant superconducting qubit

Details Preparation and manipulation of a fault-tolerant superconducting qubit Preparation and manipulation of a fault-tolerant superconducting qubit

2007-01-19

arxiv.org/abs/cond-mat/0701469v2

Phys. Rev. B 76, 064501 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Typo corrected, title changed as suggested by the editors of Phys. Rev. B, references added

Scientific paper

10.1103/PhysRevB.76.064501

We describe a qubit encoded in continuous quantum variables of an rf superconducting quantum interference device. Since the number of accessible states in the system is infinite, we may protect its two-dimensional subspace from small errors introduced by the interaction with the environment and during manipulations. We show how to prepare the fault-tolerant state and manipulate the system. The discussed operations suffice to perform quantum computation on the encoded state, syndrome extraction, and quantum error correction. We also comment on the physical sources of errors and possible imperfections while manipulating the system.

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