Bath-Induced Zeno Localization in Driven Many-Body Quantum Systems

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Bath-Induced Zeno Localization in Driven Many-Body Quantum Systems

Maimbourg, Thibaud; Basko, Denis M; Holzmann, Markus; Rosso, Alberto

Physical review letters, 2021-Mar-26, Volume: 126, Issue: 12

Journal Article

We study a quantum interacting spin system subject to an external drive and coupled to a thermal bath of vibrational modes, uncorrelated for different spins, serving as a model for dynamic nuclear polarization protocols. We show that even when the many-body eigenstates of the system are ergodic, a sufficiently strong coupling to the bath may effectively localize the spins due to many-body quantum Zeno effect. Our results provide an explanation of the breakdown of the thermal mixing regime experimentally observed above 4-5 K in these protocols.

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Maimbourg, Thibaud | Basko, Denis M | Holzmann, Markus | Rosso, Alberto

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