DISTRIBUTION OF THE ABSORPTION BY CHAOTIC STATES IN QUANTUM DOTS

The mesoscopic fluctuations of the absorption by optical transitions f rom a low-energy regular state to high-energy chaotic states are studi ed in an aggregate of semiconductor quantum dots. We derive a universa l form of the distribution for the absorption coefficient which depend s on the total number of dots and the level broadening. The fluctuatio n of absorption spectra remains appreciable even at large broadening, and it should demonstrate a strong sensitivity to weak magnetic field in the regions where large and small absorption occurs. The results al so apply to the absorption of Rydberg atoms in a strong magnetic field at the prethreshold ionization.