1998/09/30 by P. T. Cochrane, G. J. Milburn, W. J. Munro · 2 citations
Physics and Astronomy · #quant-ph
paper · pdf · doi:10.1103/physreva.59.2631
published as Phys.Rev. A59 (1999) 2631 · 4 pages, 2 postscript figures, LaTeX2e, RevTeX, minor changes, 1 reference added
arxiv created 1998/11/23 · arxiv updated 2009/12/01
We show how macroscopically distinct quantum superposition states (Schroedinger cat states) may be used as logical qubit encodings for the correction of spontaneous emission errors. Spontaneous emission causes a bit flip error which is easily corrected by a standard error correction circuit. The method works arbitrarily well as the distance between the amplitudes of the superposed coherent states increases.