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arXiv · 2009.11784

Bath-induced Zeno localization in driven many-body quantum systems

Thibaud Maimbourg·Denis M. Basko·Markus Holzmann·Alberto Rosso
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Abstract

We study a quantum interacting spin system subject to an external drive and coupled to a thermal bath of spatially localized vibrational modes, serving as a model of Dynamic Nuclear Polarization. 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, as manifested by the hole-burning shape of the electron paramagnetic resonance spectrum. Our results provide an explanation of the breakdown of the thermal mixing regime experimentally observed above 4 - 5 Kelvin.

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Thibaud Maimbourg, Denis M. Basko, Markus Holzmann, Alberto Rosso. 2020-09-24. Bath-induced Zeno localization in driven many-body quantum systems. https://doi.org/10.1103/physrevlett.126.120603

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