Mott states under the influence of fermion-boson conversion

Article

关键词: EINSTEIN CONDENSATION;    GAS;    SUPERCONDUCTIVITY;    TRANSITION;    SUPERFLUID;    INSULATOR;    MOLECULES;    ATOMS;   

DOI  :  10.1103/PhysRevB.72.220501

来源: SCIE

【 摘 要 】

The author has studied the influence of fermion-boson conversion on Mott states near Feshbach resonances. It is demonstrated that Mott states are unstable with respect to fermion-boson conversion. A branch of collective modes in superfluids has been found, which involve antisymmetric phase oscillations in fermionic and bosonic channels and are always gapped. The low-energy quantum dynamics of a Fermi-Bose superfluid can be fully characterized by either an effective coupled U(1)circle times U(1) quantum rotor Hamiltonian or a coupled XXZ circle times XXZ spin model.

【 授权许可】

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