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Abstract: We have experimentally studied few-body impurity systems consisting of asingle fermionic atom and a small bosonic field on the sites of an opticallattice. Quantum phase revival spectroscopy has allowed us to accuratelymeasure the absolute strength of Bose-Fermi interactions as a function of theinterspecies scattering length. Furthermore, we observe the modification ofBose-Bose interactions that is induced by the interacting fermion. Because ofan interference between Bose-Bose and Bose-Fermi phase dynamics, we can inferthe mean fermionic filling of the mixture and quantify its increase decreasewhen the lattice is loaded with attractive repulsive interspeciesinteractions.



Author: Sebastian Will, Thorsten Best, Simon Braun, Ulrich Schneider, Immanuel Bloch

Source: https://arxiv.org/







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