Quantum Coherence Beyond the Thermal Length

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Recent experiments have used scattering to map the flow of electrons in a two-dimensional electron gas. Among other things, the data from these experiments show perseverance of regular interference fringes beyond the kinematic thermal length. These fringes are seen in full quantum-mechanical simulations with thermal averaging, and within the phase coherence length they can also be understood with a simple, single-scattering model. This effect provides a new way to gauge the coherence length independent of thermal broadening. Appealing to higher-order scattering, we present a mechanism by which interference fringes may survive even beyond the phase coherence length.
4 pages, 2 figures, submitted to PRL

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Mesoscale and Nanoscale Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/17752

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0105354
 http://arxiv.org/abs/cond-mat/0105354

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arXiv