Soft modes in the complex Sachdev-Ye-Kitaev model

ORAL

Abstract

We discuss soft modes in the Sachdev-Ye-Kitaev model for complex fermions with large N flavors and a global U(1) charge.
The conserved charge leads to a compact scalar field in the effective action, from which
we derive the many-body density of states and extract the charge compressibility.
We compute the latter via three distinct numerical methods and obtain consistent results.

*Y.G. is supported by the Gordon and Betty Moore Foundation EPiQS Initiative through Grant (GBMF-4306) and DOE grant, DE-SC0019030. A.K. is supported by the Simons Foundation under grant 376205 and through the “It from Qubit” program, as well as by the Institute of Quantum Information and Matter, a NSF Frontier center funded in part by the Gordon and Betty Moore Foundation. S.S. and G.T. are supported by DOE grant, DE-SC0019030. G.T. acknowledges support from the MURI grant W911NF-14-1-0003 from ARO and by DOE grant DE-SC0007870

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Presenters

  • Grigory Tarnopolsky

    • Harvard University

Authors

  • Yingfei Gu

    • Harvard University
    • Havard
    • Department of Physics, Harvard University

  • Alexei Kitaev

    • Caltech
    • Physics, Caltech

  • Subir Sachdev

    • Physics, Harvard University
    • Harvard University
    • Department of Physics, Harvard University

  • Grigory Tarnopolsky

    • Harvard University