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arXiv · 2409.05828

Many-Body Dephasing by Hole Motion in a Spin-Orbit-Coupled Mott Insulator

A. Ghermaoui·M. Bosch Aguilera·R. Bouganne·R. Vatré·I. Fritsche·J. Beugnon·F. Gerbier
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Abstract

We use Ramsey interferometry to study spin dynamics in the strongly interacting regime of spin-orbit-coupled quantum gases in one-dimensional optical lattices. We observe an intrinsic many-body dephasing mechanism immune to spin-echo in two-component Mott insulators. We ascribe the dephasing to the motion of hole-like defects in an otherwise inert Mott insulator, the spinless nature of the holes explaining the ineffectiveness of spin echo to restore it. We show that a model of spin-orbit-coupled hardcore bosons can explain quantitatively our experimental observations.

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A. Ghermaoui, M. Bosch Aguilera, R. Bouganne, R. Vatré, I. Fritsche, J. Beugnon, F. Gerbier. 2024-09-09. Many-Body Dephasing by Hole Motion in a Spin-Orbit-Coupled Mott Insulator. https://arxiv.org/abs/2409.05828

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