Mixed-dimensional Bose polaron

Variational polaron method for Bose-Bose mixtures

Polaron Properties of an Impurity in Bose-Einstein-Condensation

In this paper we study an impurity in Bose-Einstein-Condensate system at T = 0K and suppose the contact forms for boson-boson and boson-impurity interactions. Using Bogoliubov theory and a further approximation corresponding to only think over the forward scattering of impurity by bosons, we derive a reduced Hamiltonian whose form is the same as the Fröhlich Hamiltonian for large polaron. By us...

Polaron-to-polaron transitions in the radio-frequency spectrum of a quasi-two-dimensional Fermi gas.

We measure radio-frequency spectra for a two-component mixture of a 6Li atomic Fermi gas in a quasi-two-dimensional regime with the Fermi energy comparable to the energy level spacing in the tightly confining potential. Near the Feshbach resonance, we find that the observed resonances do not correspond to transitions between confinement-induced dimers. The spectral shifts can be fit by assuming...

Correlated Small Polaron Transport in Mixed Valence Oxides

The electrical transport properties of mixed fdtes, oxidic superconductors and GMR compounds having ions in mixed valence state are shown to originate fhm the correlated motion of polarons and scattering by the spin disorder. The tramprt e e s of mixed valence compounds exhibit anomalous characteristics. In magnetite, it leads to a orderdisorder transition at 120 K with A-type anomaly in the sp...

Disordered one-dimensional bose-fermi mixtures: the Bose-Fermi glass.

We analyze an interacting Bose-Fermi mixture in a 1D disordered potential by using a combination of renormalization group and variational methods. We obtain the complete phase diagram in the incommensurate case as a function of bosonic and interspecies interaction strengths, in the weak disorder limit. We find that the system is characterized by several phase transitions between superfluid and ...