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General coordinate invariance and conformal invariance in nonrelativistic physics: Unitary Fermi gas
D. T. Son, M. Wingate
We show that the Lagrangian for interacting nonrelativistic particles can be coupled to an external gauge field and metric tensor in a way that exhibits a nonrelativistic version o…
Phase diagram of a cold polarized Fermi gas
D. T. Son, M. A. Stephanov
We propose a phase diagram for a cold polarized atomic Fermi gas with zero-range interaction. We identify four main phases in the plane of density and polarization: the superfluid…
Effective Lagrangian and Topological Interactions in Supersolids
D. T. Son
We construct a low-energy effective Lagrangian describing zero-temperature supersolids. Galilean invariance imposes strict constraints on the form of the effective Lagrangian. We i…
Universal Properties of Two-Dimensional Boson Droplets
H. -W. Hammer, D. T. Son
We consider a system of N nonrelativistic bosons in two dimensions, interacting weakly via a short-range attractive potential. We show that for N large, but below some critical val…