We investigate the saturation of defect density in an atomic Bose gas rapidly cooled into a superfluid phase. The number quantum vortices, which are spontaneously created quenched gas, exhibits Poissonian distribution not only for slow quench Kibble-Zurek (KZ) scaling regime but also fast case mean vortex is saturated. This shows that caused by destructive collisions, early-time coarsening emer...

An exact analytical solution of the statistical multifragmentation model is found in thermodynamic limit. The model exhibits a 1-st order phase transition of the liquid-gas type. The mixed phase region of the phase diagram, where the gas of nuclear fragments coexists with the infinite liquid condensate, is unambiguously identified. The peculiar thermodynamic properties of the model near the bou...

We investigate the properties of hard core Bosons in harmonic traps over a wide range of densities. Bose-Einstein condensation is formulated using the one-body Density Matrix (OBDM) which is equally valid at low and high densities. The OBDM is calculated using diffusion Monte Carlo methods and it is diagonalized to obtain the “natural” single particle orbitals and their occupation, including th...

A soil core, obtained from a contaminated field site, contaminated with a mixture of volatile and semivolatile organic compounds (VOC and SVOC) was subjected to air and steam flushing. Removal rates of volatile and semivolatile organic compounds were monitored during flushing. Air flushing removed a significant portion of the VOC present in the soil, but a significant decline in removal rate oc...

We prove existence results for a system of partial differential equations describing the approximate condensate wavefunction and pair-excitation kernel dilute T = 0 Bose gas in stationary setting, presence trapping potential repulsive pairwise atomic interactions. Notably, Hartree-type equation this contains contributions from non-condensate particles, pair excitation satisfies nonlinear operat...

A curvature self-interaction of the cosmic gas is shown to mimic a cosmological constant or other forms of dark energy, such as a rolling tachyon condensate or a Chaplygin gas. Any given Hubble rate and deceleration parameter can be traced back to the action of an effective curvature force on the gas particles. This force self-consistently reacts back on the cosmological dynamics. The links bet...

We present the theory of damping of low-energy excitations of a trapped Bose condensate at finite temperatures, where the damping is provided by the interaction of these excitations with the thermal excitations. We emphasize the key role of stochastization in the behavior of the thermal excitations for damping in non-spherical traps. The damping rates of the lowest excita-tions, following from ...

The article provides an analysis of the forecast hydrocarbon ratios based on data extracted. Various methods are used in technological processes gas extraction order to build models final gas-condensate yield coefficients. It is important select most accurate and reliable determine recoverable reserves condensate fields operated flood depletion regimes or assess effectiveness geological technic...

– We study theoretically the dimensional crossover from a three-dimensional elongated condensate to a one-dimensional condensate as the transverse degrees of freedom get frozen by tight confinement, in the limit of small density fluctuations, i.e. for a strongly degenerate gas. We compute analytically the radially integrated density profile at low temperatures using a local density approximatio...