Unidirectional quantum transport in optically driven V-type quantum dot chains

We predict a mechanism for achieving complete population inversion in a continuously driven InAs/GaAs semiconductor quantum dot featuring V-type transitions. This highly nonequilibrium steady state is enabled by the interplay between V-type interband transitions and a non-Markovian decoherence mechanism, introduced by acoustic phonons. The population trapping mechanism is generalized to a chain of coupled emitters. Exploiting the population inversion, we predict unidirectional excitation transport from one end of the chain to the other without external bias, independent of the unitary interdot coupling mechanism.

Automated summary

This study predicts a mechanism for achieving complete population inversion in semiconductor quantum dots, enabled by non-equilibrium steady states through the interplay of V-type interband transitions and non-Markovian decoherence mechanisms caused by acoustic phonons. The research also demonstrates the application of population inversion for unidirectional excitation transport from one end to the other.