Generation of Macroscopic Superpositions of Quantum States by Linear Coupling to a Bath
D. D. Bhaktavatsala Rao, Nir Bar‐Gill, Gershon Kurizki · Physical Review Letters · 2011
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.