Stabilizer quantum error correction toolbox for superconducting qubits
arXiv:1212.4000 · doi:10.1103/PhysRevLett.110.243604
Abstract
We present a general protocol for stabilizer measurements and pumping in a system of N superconducting qubits. We assume always-on, equal dispersive couplings to a single mode of a high-Q microwave resonator in the ultra-strong dispersive limit where the dispersive shifts largely exceed the spectral linewidth. In this limit, we show how to map the two eigenvalues of an arbitrary weight M < N Pauli operator, onto two quasi-orthogonal coherent states of the cavity. Together with a fast cavity readout, this enables the efficient measurement of stabilizer operators.
16 pages, 10 figures, includes supplemental material. Revised manuscript
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