Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2002-08-26
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
8 pages, 3 figures, Proceedings of the 26th ICPS (2002), Edinburgh
Scientific paper
Phonon cavities are believed to be the next step towards a control of dephasing in semiconductor quantum dot `qubits'. In this paper, we discuss two models for phonon cavities - a surface acoustic wave (SAW) inter-digitated transducer on an infinite half-space, and an elastic thin slab. The inelastic current through double quantum dots in non-perfect SAW cavities exhibits a gap at small energies and is completely suppressed in a perfect, infinite system. In the free-standing slab model, van Hove singularities evolve in the phonon spectral density. We find that these singularities cause additional side peaks in the inelastic current.
Brandes Tobias
Debald Stefan
Kramer Bernhard
Vorrath T.
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