1 - 10 of 11 articles
We investigate the scaling properties of the specific heat of the XY model on lattices H × H × L with L ≫ H (i.e. in a bar-like geometry) with respect to the thickness H of the bar, using the Cluster Monte Carlo method. We study the effect of the geometry and boundary conditions on the shape of...
Griffin, Wu and Stringari have derived the hydrodynamic equations of a trapped dilute Bose gas above the Bose-Einstein transition temperature. We give the extension which includes hydrodynamic damping, following the classic work of Uehling and Uhlenbeck based on the Chapman-Enskog procedure. Our...
Avalanches are seen in the invasion percolation region of an adsorption/desorption isotherm for superfluid
He on a Nuclepore filter. A theory of these avalanches combines elements from the geometry of the pore space of Nuclepore and elements from the dynamics of superfluid films. The geometry...
The quasiparticle reflection and transmission properties at normal conductor-superconductor interfaces are examined for unitary and non-unitary spin triplet pairing states recently discussed in connection with Sr
. We find resonance peaks in the Andreev reflection amplitude, which are...
We have performedcwNMR experiments on superfluid
He confined to a parallel-plate geometry with a μm scale spacing for a wide pressure range. A static field was applied parallel or perpendicular to the plate surface. The spectra of two absorption signals, a main and a satellite, have been...
The hydrodynamics equations of binary mixtures of Bose gases, Fermi gases, and mixtures of Bose and Fermi gases in the presence of external potentials are derived. These equations can be applied to current experiments on mixtures of atomic gases confined in magnetic traps.
We report on thermal conductivity measurements of the quasi-onedimensional single crystals (Ta
I (x = 0, 0.008, 0.01) between 50 mK and 6 K. The thermal conductivity of a (TaSe
I sample obeys a cubic variation below 0.8 K, in good agreement with the boundary scattering...
We develop the strong-coupling theory of coexisting charge-density-wave (CDW) and superconductivityd-wave gaps within the framework of the FLEX (fluctuation exchange) approximation for the two-dimensional Hubbard model. For nested sections of the Fermi surface these equations reduce to the...
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