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

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