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.
@article{arxiv.1212.4000,
title = {Stabilizer quantum error correction toolbox for superconducting qubits},
author = {Simon E. Nigg and Steven M. Girvin},
journal= {arXiv preprint arXiv:1212.4000},
year = {2013}
}
Comments
16 pages, 10 figures, includes supplemental material. Revised manuscript