Planckian superconductor

ORAL

Abstract

The Planckian relaxation rate h/tP=2πkBT sets a characteristic time scale for both equilibration of quantum critical systems and maximal quantum chaos. We show that at the critical coupling between a superconducting dot and the complex Sachdev-Ye-Kitaev model, known to be maximally chaotic, the pairing gap Δ behaves as η h/tP at low temperatures, where η is an order one constant. The lower critical temperature emerges with a further increase of the coupling strength so that the finite Δ domain is settled between the two critical temperatures

*This research was supported by the Netherlands Organization for Scientific Research (NWO/OCW), by the European Research Council, and by the DOE contract DEFG02-08ER46482 (NVG).

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Presenters

  • Nikolay Gnezdilov

    • Physics Department, Yale University

Authors

  • Yevheniia Cheipesh

    • Lorentz Institute for theoretical physics, Leiden University

  • Andrei Pavlov

    • The Abdus Salam International Centre for Theoretical Physics (ICTP)

  • Vincenzo Scopelliti

    • Lorentz Institute for theoretical physics, Leiden University

  • Jakub Tworzydlo

    • Institute of Theoretical Physics, University of Warsaw

  • Nikolay Gnezdilov

    • Physics Department, Yale University