1 - 9 of 9 articles
Starting from an approximate microscopic model of a trapped Bose-condensed gas at finite temperatures, we derive an equation of motion for the condensate wavefunction and a quantum kinetic equation for the distribution function for the excited atoms. The kinetic equation is a generalization of...
The effect of thermal noise on the I-V curves of DC SQUIDs in the presence or absence of microwave radiation is analyzed in detail in the frame of a unitary analytical approach based on the 2D Fokker–Planck equation. The results are particularly relevant for SQUIDs with inductances comparable or...
Measurements of the magnetization hysteresis loop performed on Bi
superconducting single crystals reveal the occurrence of pronounced jumps of the irreversible magnetization at T > 40 K. In this work we demonstrate their thermomagnetic origin. It is also shown that the...
We investigate the effect of k-space broadening of the interlayer pairing kernel on the critical temperature Tc
and the k-dependence of the gap function in a one-dimensional version of the interlayer pair-tunneling model of high-Tc
superconductivity. We consider constant as well as k-dependent...
In a mesoscopic metal in proximity with a superconductor, the electronic conductance is enhanced in a very energy-sensitive way. In this paper, we discuss the spectral conductance of a proximity superconductor from both the theoretical and experimental point of view. The dependence of the...
The diffusion of molecular hydrogen adsorbed in zeolite 13X at high coverage's has been studied by quasi-elastic neutron scattering for temperatures ranging from 0 to 60 K. No diffusive motion was observed, within instrumental resolution, at temperatures below 20 K, well above the bulk melting...
We carry out a comprehensive study of the binding of two helium atoms in unrestricted and, in particular, in restricted geometries in both two and three dimensions. Besides the well known binding of the
He dimer in unrestricted geometry in two and three dimensions, we also find weakly bound...
The energetics of superfluid films of
He adsorbed on planar substrates is studied. For this purpose, the energy per particle of the systems e is expressed as a polynomial expansion in powers of the inverse of coverage. The surface energy σA
and the chemical potential μ, defined according to...
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