1 - 10 of 12 articles
We have studied the Fermi fluid, 3He in 3He-4He solution, confined within the narrow channels of Vycor glass. Continuous wave NMR signals were observed in two almost identical coils, one containing bulk solution and the other the solution in Vycor glass. Three different solutions (0.1, 1.6, and...
Anisotropic distributions of low energy phonons in momentum space, in superfluid helium, create high energy phonons with energy ε/k
B>10K. It has been shown that phonons with ε/k
B>11K cannot decay by the inverse of the process that creates them, if the low energy phonons are in such a momentum...
We present results of a path integral Monte Carlo (PIMC) calculation of the momentum distribution of Ne and normal
He at low temperatures. In the range of temperatures analyzed, consequently exchanges can be disregarded and both systems are considered Boltzmann quantum liquids. Their quantum...
We present experimental results for the thermal resistivity ρ of superfluid 4He along several isobars between saturated vapor pressure and the melting pressure. The measurements are for the temperature range 1−T
Quantum systems with a large number of fermionic degrees of freedom are intractable by quantum simulations. In this paper we introduce the concept of a dedicated quantum simulator (DQS) which is an artificial system of quantum dots whose Hamiltonian maps exactly to the original many fermion...
Our recent measurements of the viscosity of spin polarized liquid
He revealed that, below 100mK, the relative enhancement of the viscosity is pressure independent and quadratic in polarization m up to m=70%. This simple behavior is remarkably close to that expected for a gas (i.e. isotropic...
Using the Gaussian model of the vortex tangle (VT) arising in the turbulent superfluid Hell, we calculate the energy spectrum E(k) of the 3D random velocity field induced by that VT. If the VT is assumed to be a purely fractal object with Haussdorf dimension HD, the E(k) is a power-like function...
Measurements of the vibrating wire spectrum have been carried out in superfluid
He along the melting curve down to 0.53mK. We have observed that at temperatures below 0.3 Tc the width of the mechanical resonance of the wire decreases exponentially with 1/T, indicating the ballistic regime of...
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