Quantum kinetics of carrier capture processes into a quantum dot

• Published in: Physica. B, Condensed matter Vol. 314; no. 1; pp. 455 - 458
• Main Authors: Kuhn, T, Glanemann, M, Axt, V.M
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 01.03.2002; Elsevier
• Subjects: Carrier capture; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Electronic transport in condensed matter; Electronic transport in multilayers, nanoscale materials and structures; Exact sciences and technology; General formulation of transport theory; Physics; Quantum dot; Quantum dots; Quantum kinetics; Quantum transport; Quantum wires; Theory of electronic transport; scattering mechanisms; 73.63.Nm; 72.10.Bg; Quantum dot; 73.63.Kv; Quantum kinetics; Carrier capture; Quantum transport; Quantum wires; Bound state; Quantum dots; Density matrix; Optical phonons; Electron capture; Time dependence; Charge carrier trapping; Virtual states; Phonon emission; Kinetics; Coherent states
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/S0921-4526(01)01437-5

The capture of electrons moving in a quantum wire into an embedded quantum dot due to the interaction with optical phonons is studied on a quantum kinetic level within the density matrix approach. We find even at low temperatures where only phonon emission is possible a non-monotonic time-dependence of the bound state occupations due to virtual transitions. In the case of several bound dot states the capture in general results in a coherent superposition of these states.