Defects in the multi-dimensional macroscopic quantum field of the 3 He super-fluids are localized objects with a topological charge and are topologically stable. They include point-like objects, vortex lines, planar domain-wall-like structures, and 3-dimensional textures, which may or may not include singular points or lines. An inventory of illustrations is presented which concisely lists the ...

We construct a model of non-uniform condensate having a spatially modulated complex order parameter that makes it kinematically an x-ray solid, i.e., a real mass density wave, but one admitting an associated superfluid flow. Intrinsic to this state is a non-classical translational inertia which we derive for the case of a potential flow. Connection to the non-classical rotational inertia observ...

We review self-consistent spectral methods for nuclear matter calculations. The in-medium T −matrix approach is conserving and thermodynamically consistent. It gives both the global and the single-particle properties the system. The T −matrix approximation allows to address the pairing phenomenon in cold nuclear matter. A generalization of nuclear matter calculations to the superfluid phase is ...

We discuss the problem of an explosion in the cubic-quintic superfluid model, in relation to some experimental observations. We show numerically that an explosion in such a model might induce a cavitation bubble for large enough energy. This gives a consistent view for rebound bubbles in superfluid and we identify the loss of energy between the successive rebounds as radiated waves. We compute ...

Transport in strongly interacting Fermi gases provides a window into the nonequilibrium behavior of correlated fermions. In particular, interface between polarized normal gas and weakly superfluid at finite temperature presents model for understanding transport normal-superfluid normal-superconductor interfaces. An excess polarization phase or deficit brings system out equilibrium, leading to c...

Topological invariants built from the periodic Bloch functions characterize new phases of matter, such as topological insulators and topological superconductors. The most important topological invariant is the Chern number that explains the quantized conductance of the quantum Hall effect. Here we provide a general result for the superfluid weight Ds of a multiband superconductor that is applic...

This paper introduces a nonlinear Schrr odinger model for superruid that captures the process of mutual friction between the superruid and normal uid components of helium II. Superruid vortices are identiied as topological defects in the solution of this equation. A matched asymptotic analysis of Neu 7] is adapted to derive an asymptotic dynamics for the vortices in the case they are widely sep...

We present data for energy dissipation factor (Q−1) over a broad temperature range at various pressures of a torsion pendulum setup used to study He confined in a 98% open silica aerogel. Values for Q−1 above Tc are temperature independent and have weak pressure dependence. Below Tc, a deliberate axial compression of the aerogel by 10% widens the range of metastability for a superfluid Equal Sp...

It is shown how to set up a mathematically elegant and fully rela-tivistic superfluid model that can provide a realistic approximation (neglecting small anisotropies due to crust solidity, magnetic fields, et cetera, but allowing for the regions with vortex pinning) of the global structure of a rotating neutron star, in terms of just two independently moving constituents, one of which represent...

The nonlocal nonlinear Schrodinger equation is used to analyze the superfluid flow around an impurity. The differences ̈ between the processes of vortex nucleation and roton creation are elucidated. It is argued that vortices are nucleated when the velocity around the ion exceeds the velocity of sound. q 2000 Elsevier Science B.V. All rights reserved. PACS: 67.40.Vs; 67.55; 02.60; 05.45.-a A hal...