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We investigate the relaxation of boundless and anisotropic quasiparticle systems, in liquid 4He, with given initial values of momentum and energy densities. The evolution is governed by the dispersion curve which determines the interactions between quasi-particles. The first stage of the...
Recent experiments suggest that Bose–Einstein condensation (BEC) in liquid4 can be localized when the liquid is confined in porous media. We demonstrate in a simple model of hard core bosons using Monte Carlo that the condensate can be separated into two parts. The two regions of condensate are...
We study the state of 4He films physisorbed to general Lennard–Jones type substrates at coverages near monolayer completion as a function of the range C3 and well-depth D of the substrate-helium potential. By examining the liquid-state energetics as well as the coverage dependence of the third...
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