title: Photon-assisted tunneling in a biased strongly correlated Bose gas.
abstract: We study the impact of coherently generated lattice photons on an atomic Mott insulator subjected to a uniform force. Analogous to an array of tunnel-coupled and biased quantum dots, we observe sharp, interaction-shifted photon-assisted tunneling resonances corresponding to tunneling one and two lattice sites either with or against the force and resolve multiorbital shifts of these resonances. By driving a Landau-Zener sweep across such a resonance, we realize a quantum phase transition between a paramagnet and an antiferromagnet and observe quench dynamics when the system is tuned to the critical point. Direct extensions will produce gauge fields and site-resolved spin flips, for topological physics and quantum computing.
authors.affiliation: Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: Ruichao
authors.initials: R
authors.lastname: Ma
authors.forename: M Eric
authors.initials: ME
authors.lastname: Tai
authors.forename: Philipp M
authors.initials: PM
authors.lastname: Preiss
authors.forename: Waseem S
authors.initials: WS
authors.lastname: Bakr
authors.forename: Jonathan
authors.initials: J
authors.lastname: Simon
authors.forename: Markus
authors.initials: M
authors.lastname: Greiner