Physics – Condensed Matter – Quantum Gases
Scientific paper
2011-05-23
Physics
Condensed Matter
Quantum Gases
4 pages, 4 figures
Scientific paper
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.
Bakr Waseem S.
Greiner Markus
Ma Ruichao
Preiss Philipp M.
Simon Jonathan
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