Mott states under the influence of fermion-boson conversion: invasion of superfluidity
Fei Zhou
Abstract
I study the influence of fermion-boson conversion near Feshbach resonances on Mott states of Cooper pairs and demonstrate possible invasion of superfluidity. The quantum dynamics of Fermi-Bose gases is studied using both an effective coupled U(1) U(1) quantum rotor Hamiltonian and a coupled XXZ XXZ spin Hamiltonian. I also point out two distinct branches of collective modes in superfluid states, one of which involves anti-symmetric phase oscillations in fermionic and bosonic channels and is always gapped because of fermion-boson conversion.
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