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The appearance and dynamical behavior of a He I–He II phase interface is investigated experimentally. The experimental mode in which nearly saturated He I initially at a little bit higher temperature than the lambda temperature is cooled by sudden evaporative cooling is primarily employed in...
The evolution of shape of the surface of equipotentially charged liquid hydrogen film condensed on the lower or upper plate of a horizontally placed diode in external electric fields has been studied experimentally under the condition of total compensation of the applied field by the surface...
The theory of a nonideal gas developed by N. N. Bogoliubov is applied for a semiclassical description of nonlinear dynamics of Bose condensate density. Analytical calculations lead to temperature dependence of heat capacity C v C v typical of superfluid 4 He 4 He at temperatures below and above...
Cryosorption of helium isotopes ( 3 He ( 3 He and 4 He) 4 He ) on thin layers of solid argon at low gas pressures in the bulk is studied experimentally upon a change in the layer temperature from 4.2 to 2 K 2 K . It is shown that the sorption isostere for 4 He 4 He displays anomalous behavior...
Superfluid phases of 3 He 3 He are quantum liquids with the interacting fermionic and bosonic fields. In many respects they can simulate the interacting quantum fields in the physical vacuum. One can observe analogs of such phenomena as axial anomaly, vacuum polarization, zero-charge effect,...
The occurrence of autowaves at the interface as a result of a first-order phase transition had been examined. The linear analysis of a system of the equations for a liquid which contains two components shows that a phase transition at the interface can give rise to autowaves. A spectrum of these...
We study a steady state, bearing a heat current, Q 0 . Q 0 . In the normal state of liquid 4 He 4 He with constraining geometry, near the lambda point, at temperatures T T greater than the lambda temperature, T λ . T λ . Critical order parameter fluctuations near the boundary are incorporated...
In recent years, there has been significant interest in the laser manipulation of neutral atoms, and specifically in the use of light fields to manipulate not only the internal but also the external coordinates of an atom. Among the most dramatic results of this work have been the production of...
Helium flow in an enclosure caused by sudden heating of the enclosure walls is considered. Boltzmann’s equation and complete time-dependent Navier–Stokes equations with appropriate boundary conditions are integrated numerically. It is shown that the results of calculations obtained by using...
A promising way to investigate 2 D 2 D contact phenomena is proposed. This method is based on the idea of depositing surface state electrons (SSE) on a thin layer of liquid helium covering the surface of a solid sample containing a 2 D 2 D charge carrier system. The density of SSE adjusts to...
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