Remarks on the Sachdev-Ye-Kitaev model
Abstract
We study a quantum mechanical model proposed by Sachdev, Ye and Kitaev. The model consists of N Majorana fermions with random interactions of a few fermions at a time. It it tractable in the large N limit, where the classical variable is a bilocal fermion bilinear. The model becomes strongly interacting at low energies where it develops an emergent conformal symmetry. We study two and four point functions of the fundamental fermions. This provides the spectrum of physical excitations for the bilocal field. The emergent conformal symmetry is a reparametrization symmetry, which is spontaneously broken to SL(2;R), leading to zero modes. These zero modes are lifted by a small residual explicit breaking, which produces an enhanced contribution to the four point function. This contribution displays a maximal Lyapunov exponent in the chaos region (out of time ordered correlator). We expect these features to be universal properties of large N quantum mechanics systems with emergent reparametrization symmetry. This article is largely based on talks given by Kitaev, which motivated us to work out the details of the ideas described there.
- Authors:
-
- Inst. for Advanced Study, Princeton, NJ (United States)
- Publication Date:
- Research Org.:
- Institute for Advanced Study, Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1536177
- Alternate Identifier(s):
- OSTI ID: 1331021
- Grant/Contract Number:
- SC0009988
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 10; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Maldacena, Juan, and Stanford, Douglas. Remarks on the Sachdev-Ye-Kitaev model. United States: N. p., 2016.
Web. doi:10.1103/physrevd.94.106002.
Maldacena, Juan, & Stanford, Douglas. Remarks on the Sachdev-Ye-Kitaev model. United States. https://doi.org/10.1103/physrevd.94.106002
Maldacena, Juan, and Stanford, Douglas. Fri .
"Remarks on the Sachdev-Ye-Kitaev model". United States. https://doi.org/10.1103/physrevd.94.106002. https://www.osti.gov/servlets/purl/1536177.
@article{osti_1536177,
title = {Remarks on the Sachdev-Ye-Kitaev model},
author = {Maldacena, Juan and Stanford, Douglas},
abstractNote = {We study a quantum mechanical model proposed by Sachdev, Ye and Kitaev. The model consists of N Majorana fermions with random interactions of a few fermions at a time. It it tractable in the large N limit, where the classical variable is a bilocal fermion bilinear. The model becomes strongly interacting at low energies where it develops an emergent conformal symmetry. We study two and four point functions of the fundamental fermions. This provides the spectrum of physical excitations for the bilocal field. The emergent conformal symmetry is a reparametrization symmetry, which is spontaneously broken to SL(2;R), leading to zero modes. These zero modes are lifted by a small residual explicit breaking, which produces an enhanced contribution to the four point function. This contribution displays a maximal Lyapunov exponent in the chaos region (out of time ordered correlator). We expect these features to be universal properties of large N quantum mechanics systems with emergent reparametrization symmetry. This article is largely based on talks given by Kitaev, which motivated us to work out the details of the ideas described there.},
doi = {10.1103/physrevd.94.106002},
journal = {Physical Review D},
number = 10,
volume = 94,
place = {United States},
year = {Fri Nov 04 00:00:00 EDT 2016},
month = {Fri Nov 04 00:00:00 EDT 2016}
}
Web of Science
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Operator Spreading in Quantum Maps
text, January 2018
- Moudgalya, Sanjay; Devakul, Trithep; von Keyserlingk, C. W.
- arXiv
Quantum resonant systems, integrable and chaotic
text, January 2018
- Evnin, Oleg; Piensuk, Worapat
- arXiv
Eigenvalue instantons in the spectral form factor of random matrix model
text, January 2018
- Okuyama, Kazumi
- arXiv
Symmetry Breaking in Coupled SYK or Tensor Models
text, January 2019
- Kim, Jaewon; Klebanov, Igor R.; Tarnopolsky, Grigory
- arXiv
Integrable and chaotic dynamics of spins coupled to an optical cavity
text, January 2019
- Bentsen, Gregory; Potirniche, Ionut-Dragos; Bulchandani, Vir B.
- arXiv
Majorana Fermion Quantum Mechanics for Higher Rank Tensors
text, January 2019
- Klebanov, Igor R.; Pallegar, Preethi N.; Popov, Fedor K.
- arXiv
A generalized phase space approach for solving quantum spin dynamics
text, January 2019
- Zhu, Bihui; Rey, Ana Maria; Schachenmayer, Johannes
- arXiv
Classical Glasses, Black Holes, and Strange Quantum Liquids
text, January 2019
- Facoetti, Davide; Biroli, Giulio; Kurchan, Jorge
- arXiv
Near horizon dynamics of three dimensional black holes
text, January 2019
- Grumiller, Daniel; Merbis, Wout
- arXiv
Dynamical thermalization of interacting fermionic atoms in a Sinai-oscillator trap
text, January 2019
- Frahm, Klaus M.; Ermann, Leonardo; Shepelyansky, Dima L.
- arXiv