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Many-Body Dynamics of Exciton Creation in a Quantum Dot by Optical Absorption: A Quantum Quench towards Kondo Correlations

Hakan E. Türeci, M. Hanl, M. Claassen, A. Weichselbaum, T. Hecht, B. Braunecker, A. Govorov, L. Glazman, A. Imamoglu, and J. von Delft
Phys. Rev. Lett. 106, 107402 – Published 9 March 2011
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Abstract

We study a quantum quench for a semiconductor quantum dot coupled to a Fermionic reservoir, induced by the sudden creation of an exciton via optical absorption. The subsequent emergence of correlations between spin degrees of freedom of dot and reservoir, culminating in the Kondo effect, can be read off from the absorption line shape and understood in terms of the three fixed points of the single-impurity Anderson model. At low temperatures the line shape is dominated by a power-law singularity, with an exponent that depends on gate voltage and, in a universal, asymmetric fashion, on magnetic field, indicative of a tunable Anderson orthogonality catastrophe.

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  • Received 14 May 2010

DOI:https://doi.org/10.1103/PhysRevLett.106.107402

© 2011 American Physical Society

Synopsis

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Kondo effect lights up

Published 10 March 2011

Optical spectroscopy in quantum dots finds new ways to explore an old many-body problem.

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Authors & Affiliations

Hakan E. Türeci1,2, M. Hanl3, M. Claassen2, A. Weichselbaum3, T. Hecht3, B. Braunecker4, A. Govorov5, L. Glazman6, A. Imamoglu2, and J. von Delft3

  • 1Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
  • 2Institute for Quantum Electronics, ETH-Zürich, CH-8093 Zürich, Switzerland
  • 3Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München, D-80333 München, Germany
  • 4Department of Physics, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland
  • 5Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
  • 6Sloane Physics Laboratory, Yale University, New Haven, Connecticut 06520, USA

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Issue

Vol. 106, Iss. 10 — 11 March 2011

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