Non-Markovian Dynamics of Charge Carriers in Quantum Dots

Details Non-Markovian Dynamics of Charge Carriers in Quantum Dots Non-Markovian Dynamics of Charge Carriers in Quantum Dots

2008-02-26

arxiv.org/abs/0802.3928v2

Journal of Physics: Conference Series 107 (2008) 012012

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 3 figures, International Workshop on Physics-Based Mathematical Models for Low-Dimensional Semiconductor Nanostructur

Scientific paper

10.1088/1742-6596/107/1/012012

We have investigated the dynamics of bound particles in multilevel current-carrying quantum dots. We look specifically in the regime of resonant tunnelling transport, where several channels are available for transport. Through a non-Markovian formalism under the Born approximation, we investigate the real-time evolution of the confined particles including transport-induced decoherence and relaxation. In the case of a coherent superposition between states with different particle number, we find that a Fock-space coherence may be preserved even in the presence of tunneling into and out of the dot. Real-time results are presented for various asymmetries of tunneling rates into different orbitals.

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