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We investigate the time-dependent, coherent, and dissipative dynamics ofbound particles in single multilevel quantum dots in the presence of sequentialtunnelling transport. We focus on the nonequilibrium regime where severalchannels are available for transport. Through a fully microscopic andnon-Markovian density matrix formalism we investigate transport-induceddecoherence and relaxation of the system. We validate our methodology by alsoinvestigating the Markov limit on our model. We confirm that not only does thislimit neglect the coherent oscillations between system states as expected, butalso the rate at which the steady state is reached under this limitsignificantly differs from the non-Markovian results. By a systematic analysisof the decay constants and frequencies of coherent oscillations for theoff-diagonal elements of the reduced density matrix under various realistictunneling rate anisotropies and energy configurations, we outline a criteriafor extended decoherence times.

Transient Dynamics of Confined Charges in Quantum Dots in the Sequential Tunnelling Regime