Enhanced Superexchange in a Tilted Mott Insulator
Quantum Gases
2020-02-04 v2
Abstract
In an optical lattice entropy and mass transport by first-order tunneling is much faster than spin transport via superexchange. Here we show that adding a constant force (tilt) suppresses first-order tunneling, but not spin transport, realizing new features for spin Hamiltonians. Suppression of the superfluid transition can stabilize larger systems with faster spin dynamics. For the first time in a many-body spin system, we vary superexchange rates by over a factor of 100 and tune spin-spin interactions via the tilt. In a tilted lattice, defects are immobile and pure spin dynamics can be studied.
Cite
@article{arxiv.1908.09870,
title = {Enhanced Superexchange in a Tilted Mott Insulator},
author = {Ivana Dimitrova and Niklas Jepsen and Anton Buyskikh and Araceli Venegas-Gomez and Jesse Amato-Grill and Andrew Daley and Wolfgang Ketterle},
journal= {arXiv preprint arXiv:1908.09870},
year = {2020}
}