Preprint
Sep 2026
On spatial decoherence in many-body systems
We study the dynamics of a many-body quantum system strongly interacting with a bosonic reservoir. The coupling is given by a potential operator for the system and it is linear in the field. We show that in the limit of infinite coupling strength the system undergoes instantaneous spatial decoherence. To resolve the de...
S. Marcantoni, M. Merkli
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