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arXiv · 1105.4629

Photon-Assisted Tunneling in a Biased Strongly Correlated Bose Gas

Ruichao Ma·M. Eric Tai·Philipp M. Preiss·Waseem S. Bakr·Jonathan Simon·Markus Greiner
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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.

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Ruichao Ma, M. Eric Tai, Philipp M. Preiss, Waseem S. Bakr, Jonathan Simon, Markus Greiner. 2011-08-21. Photon-Assisted Tunneling in a Biased Strongly Correlated Bose Gas. https://doi.org/10.1103/physrevlett.107.095301

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