We consider the problem of a fixed impurity coupled to a small number $N$ of noninteracting bosons. We focus on impurity-boson interactions that are mediated by a closed-channel molecule, as is the case for tuneable interatomic interactions in …
We investigate the problem of $N$ identical bosons that are coupled to an impurity particle with infinite mass. For noninteracting bosons, we show that a dynamical impurity-boson interaction, mediated by a closed-channel dimer, can induce an …
We consider the ground-state properties of an impurity particle (“polaron”) resonantly
interacting with a Bose-Einstein condensate (BEC). Focusing on the equal-mass system,
we use a variational wave function for the polaron that goes beyond previous …
We investigate universal properties of a $p$-wave Fermi gas with a resonant
interaction in which the axisymmetry is broken spontaneously or externally. Here, we
show that the short-range correlations can be completely characterized by the …
We investigate universal relations in a spinless Fermi gas near a $p$-wave Feshbach
resonance, and show that the momentum distribution nk has an asymptote proportional to
$k^{−2}$ with the proportionality constant—the $p$-wave contact—scaling with …