Supersymmetric Sachdev-Ye-Kitaev models
Journal Article
·
· Physical Review D
- Harvard Univ., Cambridge, MA (United States); Institute for Advanced Study
- Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
- Inst. for Advanced Study, Princeton, NJ (United States)
- Harvard Univ., Cambridge, MA (United States); Perimeter Inst. for Theoretical Physics, Waterloo, ON (Canada)
We discuss a supersymmetric generalization of the Sachdev-Ye-Kitaev (SYK) model. These are quantum mechanical models involving N Majorana fermions. The supercharge is given by a polynomial expression in terms of the Majorana fermions with random coefficients. The Hamiltonian is the square of the supercharge. The N = 1 model with a single supercharge has unbroken supersymmetry at large N , but nonperturbatively spontaneously broken supersymmetry in the exact theory. We analyze the model by looking at the large N equation, and also by performing numerical computations for small values of N . We also compute the large N spectrum of “singlet” operators, where we find a structure qualitatively similar to the ordinary SYK model. We also discuss an N = 2 version. In this case, the model preserves supersymmetry in the exact theory and we can compute a suitably weighted Witten index to count the number of ground states, which agrees with the large N computation of the entropy. In both cases, we discuss the supersymmetric generalizations of the Schwarzian action which give the dominant effects at low energies.
- Research Organization:
- Inst. for Advanced Study, Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
- Grant/Contract Number:
- SC0009988
- OSTI ID:
- 1423995
- Alternate ID(s):
- OSTI ID: 1339477
- Journal Information:
- Physical Review D, Journal Name: Physical Review D Journal Issue: 2 Vol. 95; ISSN PRVDAQ; ISSN 2470-0010
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Phases of $ \mathcal{N} $ = 2 Sachdev-Ye-Kitaev models
Journal Article
·
Tue Jan 17 19:00:00 EST 2023
· Journal of High Energy Physics (Online)
·
OSTI ID:1997390