Estimation of the spatial decoherence time in circular quantum dots
2009 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. B79, no 24, 245310- p.Article in journal (Refereed) Published
We propose a simple phenomenological model to estimate the spatial decoherence time in quantum dots. The dissipative phase space dynamicsis described in terms of the density matrix and the corresponding Wigner function, which are derived from a master equation with Lindblad operatorslinear in the canonical variables. The formalism was initially developed to describe diffusion and dissipation in deep inelastic heavy ioncollisions, but also an application to quantum dots is possible.It allows us to study the dependence of the decoherence rate on the dissipation strength, the temperature and an external magnetic field, which isdemonstrated in illustrative calculations on a circular GaAs one-electron quantum dot.
Place, publisher, year, edition, pages
2009. Vol. B79, no 24, 245310- p.
Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:su:diva-29769DOI: 10.1103/PhysRevB.79.245310ISI: 000267699700086OAI: oai:DiVA.org:su-29769DiVA: diva2:235127