Condensation kinetics of excitons
| Autor: | Hartmut Haug |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Condensed Matter::Quantum Gases
Physics Phase transition Condensed matter physics Condensed Matter::Other Exciton Condensation General Chemistry Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Boltzmann equation law.invention law Materials Chemistry Relaxation (physics) Bose–Einstein condensate Biexciton Boson |
| Zdroj: | Solid State Communications. 134:3-9 |
| ISSN: | 0038-1098 |
| DOI: | 10.1016/j.ssc.2004.11.051 |
| Popis: | Photo-excited excitons are in the low-density regime approximately bosons. For low enough temperatures and high enough densities of the exciton gas, a non-equilibrium phase transition in the form of a Bose–Einstein condensation (BEC) can be expected. Various levels of the description of the kinetics of relaxation and condensation due to the coupling of the excitons to a cold reservoir of acoustic phonons. For non-interacting excitons a rate equation approach with the exciton Boltzmann equation can be used. This approach will be applied to investigate the possibility of a spontaneous condensation of quantum well micro-cavity polaritons. For interacting excitons the non-markovian quantum kinetics is required for the description of the BEC in order to incorporate the changes of the energy spectrum during the condensation self-consistently. Finally colored Langevin fluctuations can be used to calculate the phase diffusion of the condensate. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect