Generation of macroscopic quantum-superposition states by linear coupling to a bath

Details Generation of macroscopic quantum-superposition states by linear coupling to a bath Generation of macroscopic quantum-superposition states by linear coupling to a bath

2010-12-21

arxiv.org/abs/1012.4594v1

Phys. Rev. Lett. 106, 010404 (2011)

Physics

Quantum Physics

4 pages, 2 figures, Physical Review Letters (in press)

Scientific paper

10.1103/PhysRevLett.106.010404

We demonstrate through an exactly solvable model that collective coupling to
any thermal bath induces effectively nonlinear couplings in a quantum many-body
(multi-spin) system. The resulting evolution can drive an uncorrelated
large-spin system with high probability into a macroscopic
quantum-superposition state. We discuss possible experimental realizations.

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