Bose-Einstein condensation of photons in an ideal atomic gas
Event details
| Date | 23.05.2013 |
| Hour | 13:00 › 14:00 |
| Speaker | Mr. Alex Kruchkov |
| Location | |
| Category | Conferences - Seminars |
We study peculiarities of Bose-Einstein condensation of photons that are in thermodynamic equilibrium with atoms of non-interacting gases. General equations of the thermodynamic equilibrium of the system under study were obtained. Solutions of these equations in the case of high temperatures, when the atomic components of the system can be considered as non-degenerated ideal gases of atoms, and photonic component can form a state with Bose condensate, were studied. Equation for transition temperature and expression for the density of condensed photons in considered system were derived. Analytical solutions of the equation for the critical temperature in a number of particular cases were considered. The existence of two regimes of Bose condensation of photons, which differ significantly in nature of transition temperature dependence on the total density of pumped into the system photons, was revealed. In one case, this dependence is a traditional fractional-power law, and in another one it is the logarithmic law. Applying numerical methods, we determine boundaries of existence and implementation conditions for different regimes of condensation depending on the physical parameters of the system under study. We also show that for a large range of physical systems that are in equilibrium with photons (from ultracold gases of alkali metals to certain types of ideal plasma), the condensation of photons should occur according to the logarithmic regime.
Practical information
- Informed public
- Free
Organizer
- Pr. H. M. Ronnow
Contact
- B. Dalla Piazza