Coherent Interaction of a Single Fermion with a Small Bosonic Field

Details Coherent Interaction of a Single Fermion with a Small Bosonic Field Coherent Interaction of a Single Fermion with a Small Bosonic Field

2010-11-16

arxiv.org/abs/1011.3807v2

Phys. Rev. Lett. 106, 115305 (2011)

Physics

Condensed Matter

Quantum Gases

4+ pages, 5 figures, updated to <a href="http://dx.doi.org/10.1103/PhysRevLett.106.115305">published version</a>

Scientific paper

10.1103/PhysRevLett.106.115305

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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