Restrictions on the coherence of the ultrafast optical emission from an electron-hole pairs condensate
arXiv:cond-mat/0106560 · doi:10.1103/PhysRevLett.87.246403
Abstract
We report on the transfer of coherence from a quantum-well electron-hole condensate to the light it emits. As a function of density, the coherence of the electron-hole pair system evolves from being full for the low density Bose-Einstein condensate to a chaotic behavior for a high density BCS-like state. This degree of coherence is transfered to the light emitted in a damped oscillatory way in the ultrafast regime. Additionally, the photon field exhibits squeezing properties during the transfer time. We analyze the effect of light frequency and separation between electron and hole layers on the optical coherence. Our results suggest new type of ultrafast experiments for detecting electron-hole pair condensation.
4 pages,3 figures, to be published in Physical Review Letters. Minor changes
Cited by in corpus (9)
- Coherence Length of Cold Exciton Gases in Coupled Quantum Wells
- Effects of strong correlations for 2D Bose-Einstein condensed dipolar excitons
- Effect of spatial resolution on the estimates of the coherence length of excitons in quantum wells
- Perturbation approach for computing frequency- and time-resolved photon correlation functions
- Josephson oscillations between exciton condensates in electrostatic traps
- Superfluidity of two- dimensional excitons in flat and harmonic traps
- Gauge-field rotation of 2D exciton Bose condensate in double quantum well by radial magnetic field
- Phase sensitive two mode squeezing and photon correlations from exciton superfluid
- Coherent exciton transport in semiconductors