Condensate Density of a Bose Gas Confined between Two Parallel Plates in Canonical Ensemble within Improved Hartree-Fock Approximation

By means of Cornwall-Jackiw-Tomboulis (CJT) effective action approach, the condensate density of a dilute Bose gas is investigated in the canonical ensemble. Our results show that the condensate density is proportional to a half-integer power law of the s-wave scattering length and distance between two plates. Apart from that, these quantities also depend on the particle number and area of each plate.

EPLETION DENSITY OF IDEAL GAS BOSE-EINSTEIN CONDENSATE BY TWO PARALLEL PLATES

By means of the second quantization formalism, the condensate density of an infinite Bose gas and finite Bose gas is studied in the broken phase. Our results show that the compactification in one-direction makes the remarkable changes in the condensate density.

EXPERIMENTAL INVESTIGATION INTO SOME OF THE ASPECTS OFCONDENSATE EVAPORATION WITH A "DRY" HYDROCARBON GASIN THE PVT BOMB

The paper investigates the indicators of the down hole zone stimulation process on gas-condensate well by applying "dry" natural gas in different thermo-baric conditions. The designed experimental investigation has been carried out in pVT bomb for eliminating different unnecessary factors may impact on obtained results. Investigation considered the dependences of the physicochemical and thermodynamic properties of fluids, as well as the rate of evaporated condensate on temperature, condensate density, and the number of contacts. The data obtained provide valuable directions for optimizing well productivity

Nonlinear eigenmodes of a non-equilibrium harmonic oscillator

We investigate theoretically the quantum oscillator-like states recently observed experimentally in polariton condensates. We consider a complex Gross–Pitaevskii-type model that includes the effects of self-interactions, and creation and decay of exciton-polaritons. We develop a perturbation theory for approximate solutions to this non-equilibrium condensate model and compare the results with numerically calculated solutions for both repulsive and attractive polariton–polariton interactions. While the nonlinearity has a weak effect on the mode selection, the condensate density profiles are modified at moderate gain strengths. We find the nonlinearity becomes more dominant when a very large gain of polaritons leads to an extended cloud with high condensate densities. Finally, we identify the relation of the observed patterns to the input pump configuration, and suggest this may serve as a generalized NOR gate in the tradition of optical computing.