Renormalization approach for quantum-dot structures under strong alternating fields

Details Renormalization approach for quantum-dot structures under strong alternating fields Renormalization approach for quantum-dot structures under strong alternating fields

2001-10-20

arxiv.org/abs/cond-mat/0110434v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 7 figures

Scientific paper

10.1103/PhysRevB.66.195310

We develop a renormalization method for calculating the electronic structure of single and double quantum dots under intense ac fields. The nanostructures are emulated by lattice models with a clear continuum limit of the effective-mass and single-particle approximations. The coupling to the ac field is treated non-perturbatively by means of the Floquet Hamiltonian. The renormalization approach allows the study of dressed states of the nanoscopic system with realistic geometries as well arbitrary strong ac fields. We give examples of a single quantum dot, emphasizing the analysis of the effective-mass limit for lattice models, and double-dot structures, where we discuss the limit of the well used two-level approximation.

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