Three-body correlations in nonlinear response of correlated quantum liquid

Tokuro Hata (), Yoshimichi Teratani, Tomonori Arakawa, Sanghyun Lee, Meydi Ferrier, Richard Deblock, Rui Sakano, Akira Oguri and Kensuke Kobayashi ()
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Tokuro Hata: Osaka University
Yoshimichi Teratani: Osaka City University
Tomonori Arakawa: Osaka University
Sanghyun Lee: Osaka University
Meydi Ferrier: Osaka University
Richard Deblock: Université Paris-Saclay, CNRS, Laboratoire de Physique des Solides
Rui Sakano: The University of Tokyo
Akira Oguri: Osaka City University
Kensuke Kobayashi: Osaka University

Nature Communications, 2021, vol. 12, issue 1, 1-7

Abstract: Abstract Behavior of quantum liquids is a fascinating topic in physics. Even in a strongly correlated case, the linear response of a given system to an external field is described by the fluctuation-dissipation relations based on the two-body correlations in the equilibrium. However, to explore nonlinear non-equilibrium behaviors of the system beyond this well-established regime, the role of higher order correlations starting from the three-body correlations must be revealed. In this work, we experimentally investigate a controllable quantum liquid realized in a Kondo-correlated quantum dot and prove the relevance of the three-body correlations in the nonlinear conductance at finite magnetic field, which validates the recent Fermi liquid theory extended to the non-equilibrium regime.

Date: 2021
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DOI: 10.1038/s41467-021-23467-4

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