Observation of many-body long-range tunneling after a quantum quench
Abstract
Quantum tunneling constitutes one of the most fundamental processes in nature. We observe resonantly-enhanced long-range quantum tunneling in one-dimensional Mott-insulating Hubbard chains that are suddenly quenched into a tilted configuration. Higher-order many-body tunneling processes occur over up to five lattice sites when the tilt per site is tuned to integer fractions of the Mott gap. Starting from a one-atom-per-site Mott state the response of the many-body quantum system is observed as resonances in the number of doubly occupied sites and in the emerging coherence in momentum space. Second- and third-order tunneling shows up in the transient response after the tilt, from which we extract the characteristic scaling in accordance with perturbation theory and numerical simulations.
Keywords
Cite
@article{arxiv.1312.2758,
title = {Observation of many-body long-range tunneling after a quantum quench},
author = {Florian Meinert and Manfred J. Mark and Emil Kirilov and Katharina Lauber and Philipp Weinmann and Michael Gröbner and Andrew J. Daley and Hanns-Christoph Nägerl},
journal= {arXiv preprint arXiv:1312.2758},
year = {2014}
}
Comments
22 pages, 7 figures