Macroscopically distinct quantum superposition states as a bosonic code for amplitude damping

Details Macroscopically distinct quantum superposition states as a bosonic code for amplitude damping Macroscopically distinct quantum superposition states as a bosonic code for amplitude damping

1998-09-14

arxiv.org/abs/quant-ph/9809037v2

Phys.Rev. A59 (1999) 2631

Physics

Quantum Physics

4 pages, 2 postscript figures, LaTeX2e, RevTeX, minor changes, 1 reference added

Scientific paper

10.1103/PhysRevA.59.2631

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.

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