Abstract
We show how macroscopically distinct quantum superposition states (Schrödinger 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.
- Received 14 September 1998
DOI:https://doi.org/10.1103/PhysRevA.59.2631
©1999 American Physical Society
