Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-11-17
Physical Review A 80, 053604 (2009)
Physics
Condensed Matter
Quantum Gases
9 pages, 7 figures
Scientific paper
10.1103/PhysRevA.80.053604
We study the temperature dependence of optical properties of dilute gases of alkali-metal atoms in the state with Bose-Einstein condensates. The description is constructed in the framework of the microscopic approach that is based on the Green-functions formalism. We find the expressions for the scalar Green functions describing a linear response of a condensed gas to a weak external electromagnetic field (laser). It is shown that these functions depend on the temperature, other physical properties of a system, and on the frequency detuning of a laser. We compare the relative contributions of the condensate and non-condensate particles in the system response. The influence of the temperature effects is studied by the example of two- and three-level systems. We show that in these cases, which are most commonly realized in the present experiments, the group velocity and the absorption rate of pulses practically do not depend on the gas temperature in the region from the absolute zero to the critical temperature. We discuss also the cases when the temperature effects can play a significant role in the phenomenon of slowing of electromagnetic pulses in a gas of alkali-metal atoms with Bose-Einstein condensates.
Slyusarenko Yurii
Sotnikov Andrii
No associations
LandOfFree
Role of temperature effects in the phenomenon of ultraslow electromagnetic pulses in Bose-Einstein condensates of alkali-metal atoms does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Role of temperature effects in the phenomenon of ultraslow electromagnetic pulses in Bose-Einstein condensates of alkali-metal atoms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Role of temperature effects in the phenomenon of ultraslow electromagnetic pulses in Bose-Einstein condensates of alkali-metal atoms will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-650432