Momentum distribution of an interacting Bose-condensed gas at finite temperature

Abstract

We use a semiclassical two-fluid model to study the momentum distribution of a Bose-condensed gas with repulsive interactions inside a harmonic trap at finite temperature, with specific focus on atomic hydrogen. We give particular attention to the average kinetic energy, which is almost entirely associated with the thermal cloud. A non-linear dependence of the kinetic energy on temperature is displayed, affording a precise way to assess the temperature of the gas. We also show that the kinetic energy increases with the strength of the interactions, reflecting an enhanced rate of depletion of the condensate with increasing temperature.

8 pages, 4 EPS figures

References in corpus (5)

• Bragg spectroscopy of a Bose-Einstein condensate
• Bose-Einstein Condensation of Atomic Hydrogen
• Cold Collision Frequency Shift of the 1S-2S Transition in Hydrogen
• Precision Monte Carlo Test of the Hartree-Fock Approximation for a trapped Bose Gas
• 1S-2S Spectrum of a Hydrogen Bose-Einstein Condensate

Cited by in corpus (6)

• Demixing in mesoscopic boson-fermion clouds inside cylindrical harmonic traps: quantum phase diagram and role of temperature
• Boson-fermion demixing in a cloud of lithium atoms in a pancake trap
• Boson-fermion mixtures inside an elongated cigar-shaped trap
• Density profile of a strictly two-dimensional Bose gas at finite temperature
• Bose-Einstein condensation of correlated atoms in a trap
• Strong interaction induced dimensional crossover in 1D quantum gas