The macroscopic qubit delusion

Details The macroscopic qubit delusion The macroscopic qubit delusion

2008-12-04

arxiv.org/abs/0812.0999v1

Physics

Quantum Physics

4 pages, no figures

Scientific paper

There exists a large number of experimental and theoretical results supporting the picture of "macroscopic qubits" implemented, for instance, by Rydberg atoms, Josephson junctions or Bose-Einstein condensates - the systems which should rather emerge in localized semiclassical states. In this note it is shown how, under realistic conditions, the false qubit interpretation can be consistent with the restricted set of experimental data collected for semiclassical systems. The recent experiments displaying semiclassical character of Bose-Einstein condensates and possible quantumness tests for a single system are briefly invoked also.

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