New Submission: Symplectic Kondo effect for impurities and lattices - achiving quantum criticality.

ORAL

Abstract

A Kondo model with symplectic symmetry was recently put forward as the effective low-energy theory of a superconducting-island device coupled to multiple leads. This model, which possesses non-Fermi liquid physics and effective anyons, was argued to belong to the class of topological Kondo effects. The results have been obtained using Bethe anasatz, conformal field theory and NRG. I will discuss properties of the model and address the problem of stability of its exotic fixed point .

*ML, SS, and ES acknowledge support from the Eu-ropean Research Council (ERC) Synergy funding forProject No. 951541. ML was also supported by theIsrael Science Foundation (ISF), Grant No. 154/19.MG has been supported by the ISF and the Direc-torate for Defense Research and Development (DDR&D)Grant No. 3427/21, the ISF grant No. 1113/23, and theUS-Israel Binational Science Foundation (BSF) GrantNo. 2020072. AMT and AW where supported by Office ofBasic Energy Sciences, Material Sciences and Engineer-ing Division, U.S. Department of Energy (DOE) underContract No. DE-SC0012704.

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Publication: 1. "Exact solution of the topological symplectic Kondo problem", Elio J. K\"onig, Alexei M. Tsvelik, Ann. Phys. Konstantin Efetov memorial volume, 169231 (2023), doi:10.1016/j.aop.2023.169231
2. "Topological Quantum Computation on a Chiral Kondo Chain", T. Ren, A. M. Tsvelik, E. Konig, Phys. Rev. B 109, 075145 (2024), Editors Suggestion.
URL: https://link.aps.org/doi/10.1103/PhysRevB.109.075145
3. "Relevance of Anisotropy in the Kondo Effect -- Lessons From the Symplectic Case", M. Lotem, S. Sankar, M. Goldstein, and E. Sela, T. Ren, A. Weichselbaum, A. Tsvelik, E. Konig, arXiv:2407.12093, submitted to PRB, BV14491

Presenters

  • Alexei Tsvelik

    • Brookhaven National Laboratory (BNL)

Authors

  • Alexei Tsvelik

    • Brookhaven National Laboratory (BNL)

  • Andreas Weichselbaum

    • Brookhaven National Laboratory (BNL)
    • Brookhaven National Laboratory

  • Elio Koenig

    • University of Wisconsin/Madison

  • Matan Lotem

    • Ben-Gurion University of the Negev

  • Eran Sela

    • Tel Aviv University

  • Moshe Goldstein

    • Tel Aviv University