Many-Body Dephasing by Hole Motion in a Spin-Orbit-Coupled Mott Insulator
Alexis Ghermaoui, Manel Bosch Aguilera, Raphaël Bouganne +4 more
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.
arXiv:2409.05828•Sep 9, 2024•0 citations