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.
@article{arxiv.quant-ph/9809037,
title = {Macroscopically distinct quantum superposition states as a bosonic code for amplitude damping},
author = {P. T. Cochrane and G. J. Milburn and W. J. Munro},
journal= {arXiv preprint arXiv:quant-ph/9809037},
year = {2009}
}