Generation of macroscopic superpositions of quantum states by linear coupling to a bath

D. D. Bhaktavatsala Rao, Nir Bar-Gill, Gershon Kurizki

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Abstract

We demonstrate through an exactly solvable model that collective coupling to any thermal bath induces effectively nonlinear couplings in a quantum many-body (multispin) 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.

Original languageAmerican English
Article number010404
JournalPhysical Review Letters
Volume106
Issue number1
DOIs
StatePublished - 2011
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the Australian Research Council.

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