Landau-Zener-Stueckelberg Physics with a Singular Continuum of States

D. M. Basko
Phys. Rev. Lett. 118, 016805 – Published 6 January 2017
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Abstract

This Letter addresses the dynamical quantum problem of a driven discrete energy level coupled to a semi-infinite continuum whose density of states has a square-root-type singularity, such as states of a free particle in one dimension or quasiparticle states in a BCS superconductor. The system dynamics is strongly affected by the quantum-mechanical repulsion between the discrete level and the singularity, which gives rise to a bound state, suppresses the decay into the continuum, and can produce Stueckelberg oscillations. This quantum coherence effect may limit the performance of mesoscopic superconducting devices, such as the quantum electron turnstile.

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  • Received 13 September 2016

DOI:https://doi.org/10.1103/PhysRevLett.118.016805

© 2017 American Physical Society

Physics Subject Headings (PhySH)

General PhysicsCondensed Matter, Materials & Applied Physics

Authors & Affiliations

D. M. Basko

  • Laboratoire de Physique et Modélisation des Milieux Condensés, Université Grenoble Alpes and CNRS, F-38000 Grenoble, France

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Issue

Vol. 118, Iss. 1 — 6 January 2017

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