Photon-assisted tunneling in a biased strongly correlated Bose gas

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 lat...

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Bibliographic Details
Published in:Physical review letters 2011-08, Vol.107 (9), p.095301
Main Authors: Ma, Ruichao, Tai, M Eric, Preiss, Philipp M, Bakr, Waseem S, Simon, Jonathan, Greiner, Markus
Format: Article
Language:English
Subjects:
BOSE-EINSTEIN GAS
BOSONS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPUTERS
ELEMENTARY PARTICLES
MASSLESS PARTICLES
MATHEMATICS
MECHANICS
NANOSTRUCTURES
PHOTONS
QUANTUM COMPUTERS
QUANTUM DOTS
QUANTUM MECHANICS
RESONANCE
SPIN FLIP
TOPOLOGY
TUNNEL EFFECT
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Description
Summary: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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.107.095301