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Updated: Jun 5, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
Published on: June 8, 2018
Quantum simulation of multiple-exciton generation in a nanocrystal by a single photon
Wayne M Witzel1, Andrew Shabaev, C Stephen Hellberg
1Naval Research Laboratory, Washington D.C. 20375, USA.
Abstract:
We have shown theoretically that efficient multiple-exciton generation (MEG) by a single photon can be observed in small nanocrystals. Our quantum simulations that include hundreds of thousands of exciton and multiexciton states demonstrate that the complex time-dependent dynamics of these states in a closed electronic system yields a saturated MEG effect on a picosecond time scale. Including phonon relaxation confirms that efficient MEG requires the exciton-biexciton coupling time to be faster than exciton relaxation time.
