We explore the spin superfluid transport in exchange interaction dominated three-sublattice antiferromagnets. The system long-wavelength regime is described by an $SO(3)$ invariant field theory. Additional corrections from Dzyaloshinskii-Moriya interactions or anisotropies can break symmetry; however, still approximately holds a $U(1)$-rotation symmetry. Thus, power-law spatial decay signature ...

A microscopic statistical model of a quantum solid is developed, where inside crystalline lattice there can exist regions disorder, such as dislocation networks or grain boundaries. The cores these disorder are allowed for exhibiting fluid-like properties. If the composed Bose atoms, then aggregations exhibit Bose-Einstein condensation and hence superfluidity. randomly distributed throughout sa...

We discuss the conditions under which the predicted (but not yet observed) zero-field inter-layer excitonic condensation in double layer graphene has a critical temperature high enough to allow detection. Crucially, disorder arising from charged impurities and corrugation in the lattice structure—invariably present in all real samples—affects the formation of the condensate via the induced char...

In this paper we investigate the effect of a pinned superfluid component on the gravitational wave emission of a steadily rotating deformed neutron star. We show that the superfluid pinning allows the possibility for there to be gravitational wave emission at both the stellar spin frequency Ω and its first harmonic, 2Ω. This contrasts with the conventional case where there is no pinned superflu...

The bulk viscosity of the neutron star matter due to the direct Urca processes involving nucleons, electrons and muons is studied taking into account possible superfluidity of nucleons in the neutron star cores. The cases of singlet-state pairing or triplet-state pairing (without and with nodes of the superfluid gap at the Fermi surface) of nucleons are considered. It is shown that the superflu...

Submitted for the MAR05 Meeting of The American Physical Society Superfluidity of interacting bosons in one-dimension via strong disorder NOAH BRAY-ALI, UC Berkeley, Physics Department, JOEL MOORE, UC Berkeley, Physics Department; Lawrence Berkeley National Laboratory, Materials Science Division — We have found a novel set of superfluid and Mott insulating phases arising in strongly-disordered,...

J. Nyéki,* R. Ray, B. Cowan, and J. Saunders Millikelvin Laboratory, Department of Physics, Royal Holloway University of London, Egham, Surrey, TW20 0EX, United Kingdom (Received 2 March 1998) The superfluidity of 4He films adsorbed on the atomically flat surface of graphite, preplated with HD to tune the surface binding potential, has been studied using a torsional oscillator. The superfluidit...

We investigate the one-dimensional quantum XXZ model in the presence of diagonal disorder. Recently the model has been analyzed with the help of field-theoretical renormalization group methods, and a phase diagram has been predicted. We study the model with exact diagonalization techniques up to chain lengths of 16 sites. Using finite-size scaling methods we estimate critical exponents and the ...

We analyze the phase diagram of uniform superfluidity for two-species fermion mixtures from the Bardeen-Cooper-Schrieffer to Bose-Einstein condensation (BEC) limit as a function of the scattering parameter and population imbalance. We find at zero temperature that the phase diagram of population imbalance versus scattering parameter is asymmetric for unequal masses, having a larger stability re...

We present a method to determine the critical rotational frequencies for superfluidity of both uniform and trapped Fermi gases across a wide Feshbach resonance. It is found that as one approaches the resonance from the BCS side, beyond a critical scattering length, pairing is so robust that superfluidity cannot be destroyed by rotation. Moreover, the critical frequency has a sequence of jumps r...