Coherent Interaction of a Single Fermion with a Small Bosonic Field

Sebastian Will, Thorsten Best, Simon Braun, Ulrich Schneider, and Immanuel Bloch
Phys. Rev. Lett. 106, 115305 – Published 18 March 2011
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We have experimentally studied few-body impurity systems consisting of a single fermionic atom and a small bosonic field on the sites of an optical lattice. Quantum phase revival spectroscopy has allowed us to accurately measure the absolute strength of Bose-Fermi interactions as a function of the interspecies scattering length. Furthermore, we observe the modification of Bose-Bose interactions that is induced by the interacting fermion. Because of an interference between Bose-Bose and Bose-Fermi phase dynamics, we can infer the mean fermionic filling of the mixture and quantify its increase (decrease) when the lattice is loaded with attractive (repulsive) interspecies interactions.

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  • Received 19 November 2010


© 2011 American Physical Society

Authors & Affiliations

Sebastian Will*, Thorsten Best, Simon Braun, Ulrich Schneider, and Immanuel Bloch

  • Institut für Physik, Johannes Gutenberg-Universität, 55099 Mainz, Germany, Ludwig-Maximilians-Universität, 80799 München, Germany, Max-Planck-Institut für Quantenoptik, 85748 Garching, Germany

  • *
  • Present address: Albert-Ludwigs-Universität, 79104 Freiburg, Germany.

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Vol. 106, Iss. 11 — 18 March 2011

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