Detecting superconductivity out-of-equilibrium

ORAL

Abstract

Recent pump-probe experiments on underdoped cuprates and similar systems suggest the existence of a transient superconducting state above Tc . This poses the question how to reliably identify the emergence of long-range order, in particular superconductivity, out-of-equilibrium. We investigate this point by studying a quantum quench in an extended Hubbard model and by computing various observables, which are used to identify (quasi-)long-range order in equilibrium. Our findings imply that, in contrast to current experimental studies, it does not suffice to study the time evolution of the optical conductivity to identify superconductivity. In turn, we suggest to utilize time-resolved ARPES experiments to probe for the formation of a condensate in the single- and two-particle channel.

*Deutsche Forschungsgemeinschaft (DFG) Research Unit FOR 1807 (project P7)
Deutsche Forschungsgemeinschaft (DFG) through SFB/CRC1073 (projects B03 and B07)
European Union’s Horizon 2020 research and innovation program under grant agreement No. 758935

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Presenters

  • Sebastian Paeckel

    • Insitut fuer Theoretische Physik, Georg-August Universitaet Goettingen
    • University of Gottingen
    • Institut für Theoretische Physik, Georg-August-Universität Göttingen, D-37077 Göttingen, Germany

Authors

  • Sebastian Paeckel

    • Insitut fuer Theoretische Physik, Georg-August Universitaet Goettingen
    • University of Gottingen
    • Institut für Theoretische Physik, Georg-August-Universität Göttingen, D-37077 Göttingen, Germany

  • Benedikt Fauseweh

    • Los Alamos National Laboratory
    • Theoretical Division, Los Alamos National Laboratory

  • Alexander Osterkorn

    • Insitut fuer Theoretische Physik, Georg-August Universitaet Goettingen
    • Institut für Theoretische Physik, Georg-August-Universität Göttingen, D-37077 Göttingen, Germany

  • Thomas Koehler

    • Department of Physics and Astronomy, Uppsala University
    • Department of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden
    • Uppsala Univ

  • Dirk Manske

    • Max Planck Institute for Solid State Research
    • Quantum Many-Body Theory, Max-Planck-Institut für Festkörperforschung
    • Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart, Germany

  • Salvatore Manmana

    • University of Gottingen
    • Insitut fuer Theoretische Physik, Georg-August Universitaet Goettingen
    • Institut für Theoretische Physik, Georg-August-Universität Göttingen, D-37077 Göttingen, Germany
    • Institute for Theoretical Physics, Georg-August-Universität Göttingen