Dicke states in multiple quantum dots

Anna Maria Sitek, Andrei Manolescu

Research output: Contribution to journalArticlepeer-review

Abstract

We present a theoretical study of the collective optical effects which can occur in groups of three and four quantum dots. We define conditions for stable subradiant (dark) states, rapidly decaying super-radiant states, and spontaneous trapping of excitation. Each quantum dot is treated like a two-level system. The quantum dots are, however, realistic, meaning that they may have different transition energies and dipole moments. The dots interact via a short-range coupling which allows excitation transfer across the dots, but conserves the total population of the system. We calculate the time evolution of single-exciton and biexciton states using the Lindblad equation. In the steady state the individual populations of each dot may have permanent oscillations with frequencies given by the energy separation between the subradiant eigenstates.
Original languageEnglish
Article number043807
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
DOIs
Publication statusPublished - 8 Oct 2013

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