The steady state of two quantum dots in a cavity

The steady state of two quantum dots (QDs) resonantly coupled to a cavity mode is investigated under two pumping configurations: when the QDs are indistinguishable for the excitation, we find that as a result of the efficient singlet state population, the cavity emission is suppressed. On the other hand, the storage of photons is strongly enhanced when the dots are pumped independently. The system is found to be suitable for entanglement in the first case and for lasing in the second. (C) 2007 Elsevier Ltd. All rights reserved.