We study the zero-temperature superfluid-insulator transition for a two-dimensional model of interacting, lattice bosons in the presence of quenched disorder and particle-hole symmetry. We follow the approach of a recent series of papers by Altman, Kafri, Polkovnikov, and Refael, in which the strong disorder renormalization group is used to study disordered bosons in one dimension. Adapting thi...

We study the zero temperature superfluid-insulator transition for a two-dimensional model of interacting, lattice bosons in the presence of quenched disorder and particle-hole symmetry. We follow the approach of a recent series of papers by Altman, Kafri, Polkovnikov, and Refael, in which the strong disorder renormalization group is used to study disordered bosons in one dimension. Adapting thi...

Many direct parallels connect superfluid 3 He with the field theories describing the physical vacuum, gauge fields and elementary fermions. Superfluid 3 He exhibits a variety of topological defects which can be detected with single-defect sensitivity. Modern scenarios of defect-mediated baryogenesis can be simulated by the interaction of the 3 He vortices and domain walls with fermionic quasipa...

Quantum Monte Carlo simulations are used to investigate the twodimensional superfluid properties of the hard-core boson model, which show a strong dependence on particle density and disorder. We obtain further evidence that a half-filled clean system becomes superfluid via a finite temperature Kosterlitz-Thouless transition. The relationship between low temperature superfluid density and partic...

We discuss finite temperature effects in superfluid Helium, providing a direct demonstration that a model based on treating the excitations in the system as a massless “entropy” fluid is equivalent to the traditional two-fluid approach. In particular, we demonstrate how the entropy entrainment is related to the “normal fluid density”. We also show how the superfluid constraint of irrotationalit...

We review the superfluid to Mott-insulator transition of cold atoms in optical lattices. The experimental signatures of the transition are discussed and the RPA theory of the Bose-Hubbard model briefly described. We point out that the critical behavior at the transition, as well as the prediction by the RPA theory of a gapped mode (besides the Bogoliubov sound mode) in the superfluid phase, are...

The present article suggests a preliminary version of Cantorian superfluid vortex hypothesis as a plausible model of nonlinear cosmology. Using the proposed model we explain the physical origin of quantum-like approach to describe planetary orbits as proposed in the recent literature. The meaning of the Cantorian superfluid vortex hypothesis is discussed, particularly in the context of offering...

We study the finite temperature-density phase diagram of an attractive fermionic system that supports two-body (dimer) and three-body (trimer) bound states in free space. Using interactions characteristic for nuclear systems, we obtain the critical temperature Tc2 for the superfluid phase transition and the limiting temperature Tc3 for the extinction of trimers. The phase diagram features a Coo...

We investigate the 1S0 neutron and proton superfluidity in isospin asymmetric nuclear matter. We have concentrated on the isospin dependence of the pairing gaps and the effect of a microscopic three-body force. It is found that as the isospin asymmetry goes higher, the neutron 1S0 superfluid phase shrinks gradually to a smaller density domain, while the proton one extends rapidly to a much wide...

We investigate the 1S0 neutron and proton superfluidity in isospin asymmetric nuclear matter. We have concentrated on the isospin dependence of the pairing gaps and the effect of a microscopic threebody force. It is found that as the isospin asymmetry goes higher, the neutron 1S0 superfluid phase shrinks gradually to a smaller density domain, while the proton one extends rapidly to a much wider...