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Superfluid-insulator transition in Fermi-Bose mixtures and the orthogonality catastrophe
Gil Refael, Eugene Demler
The superfluid-insulator transition of bosons is strongly modified by the presence of Fermions. Through an imaginary-time path integral approach, we derive the self-consistent mean…
Effect of inhomogeneous coupling on superconductivity
Yue Zou, Israel Klich, Gil Refael
We investigate the influence of inhomogeneity in the pairing coupling constant on dirty BCS superconductors, focusing on , the order parameter , and the…
The insulating phases and superfluid-insulator transition of disordered boson chains
Ehud Altman, Yariv Kafri, Anatoli Polkovnikov +1
Using a strong disorder real-space renormalization group (RG), we study the phase diagram of a fully disordered chain of interacting bosons. Since this approach does not suffer fro…
Sharp Superconductor-Insulator Transition in Short Wires
Dganit Meidan, Yuval Oreg, Gil Refael +1
Recent experiments on short MoGe nanowires show a sharp superconductor-insulator transition tuned by the normal state resistance of the wire, with a critical resistance of $R_c\app…
Superfluidity and magnetism in multicomponent ultracold fermions
R. W. Cherng, Gil Refael, Eugene Demler
We study the interplay between superfluidity and magnetism in a multicomponent gas of ultracold fermions. Ward-Takahashi identities constrain possible mean-field states describing…
Vortex Lattice Locking in Rotating Two-Component Bose-Einstein Condensates
Ryan Barnett, Gil Refael, Mason A. Porter +1
The vortex density of a rotating superfluid, divided by its particle mass, dictates the superfluid's angular velocity through the Feynman relation. To find how the Feynman relation…