Supersymmetry in the Standard Sachdev-Ye-Kitaev Model.
Physical review letters
American Physical Society
MetadataShow full item record
Behrends, J., & Béri, B. (2020). Supersymmetry in the Standard Sachdev-Ye-Kitaev Model.. Physical review letters, 124 (23), 236804. https://doi.org/10.1103/physrevlett.124.236804
Supersymmetry is a powerful concept in quantum many-body physics. It helps to illuminate ground state properties of complex quantum systems and gives relations between correlation functions. In this work, we show that the Sachdev-Ye-Kitaev model, in its simplest form of Majorana fermions with random four-body interactions, is supersymmetric. In contrast to existing explicitly supersymmetric extensions of the model, the supersymmetry we find requires no relations between couplings. The type of supersymmetry and the structure of the supercharges are entirely set by the number of interacting Majorana modes, and are thus fundamentally linked to the model's Altland-Zirnbauer classification. The supersymmetry we uncover has a natural interpretation in terms of a one-dimensional topological phase supporting Sachdev-Ye-Kitaev boundary physics, and has consequences away from the ground state, including in $q$-body dynamical correlation functions.
European Commission Horizon 2020 (H2020) ERC (678795)
External DOI: https://doi.org/10.1103/physrevlett.124.236804
This record's URL: https://www.repository.cam.ac.uk/handle/1810/305824
All rights reserved