Quantum quench of Kondo correlations in optical absorption

C. Latta (), F. Haupt, M. Hanl, A. Weichselbaum, M. Claassen, W. Wuester, P. Fallahi, S. Faelt, L. Glazman, J. von Delft, H. E. Türeci and A. Imamoglu ()
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C. Latta: Institute of Quantum Electronics, ETH-Zürich
F. Haupt: Institute of Quantum Electronics, ETH-Zürich
M. Hanl: Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München
A. Weichselbaum: Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München
M. Claassen: Institute of Quantum Electronics, ETH-Zürich
W. Wuester: Institute of Quantum Electronics, ETH-Zürich
P. Fallahi: Institute of Quantum Electronics, ETH-Zürich
S. Faelt: Institute of Quantum Electronics, ETH-Zürich
L. Glazman: Sloane Physics Laboratory, Yale University
J. von Delft: Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-Universität München
H. E. Türeci: Institute of Quantum Electronics, ETH-Zürich
A. Imamoglu: Institute of Quantum Electronics, ETH-Zürich

Nature, 2011, vol. 474, issue 7353, 627-630

Abstract: The Kondo effect seen in a new light One of the most celebrated phenomena in many-body physics is the Kondo effect, which describes the interaction between a single confined spin and the spins of an electron reservoir. In the past decade, the effect has been extensively studied in quantum dots, where a single electron spin in the quantum dot interacts with the sea of electrons in the contacts. So far, only electronic transport measurements have been done on these systems, but Latta et al. add a new dimension by carrying out optical measurements. They show that, remarkably, absorption of a single photon leads to an abrupt change in the interactions of the single spin with the electron reservoir; a quantum quench of Kondo correlations. The study initiates a new direction where quantum optics techniques are used to study many-body phenomena.

Date: 2011
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DOI: 10.1038/nature10204

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