Sparse Sachdev-Ye-Kitaev model, quantum chaos, and gravity duals
Abstract
We study a sparse Sachdev-Ye-Kitaev (SYK) model with N Majoranas where only ~ kN independent matrix elements are nonzero. We identify a minimum k ≳ 1 for quantum chaos to occur by a level statistics analysis. The spectral density in this region, and for a larger k, is still given by the Schwarzian prediction of the dense SYK model, though with renormalized parameters. Similar results are obtained for a beyond linear scaling with N of the number of nonzero matrix elements. This is a strong indication that this is the minimum connectivity for the sparse SYK model to still have a quantum gravity dual. We also find an intriguing exact relation between the leading correction to moments of the spectral density due to sparsity and the leading 1/d correction of Parisi’s U(1) lattice gauge theory in a d -dimensional hypercube. In the k → 1 limit, different disorder realizations of the sparse SYK model show emergent random matrix statistics that for fixed N can be in any universality class of the tenfold way. The agreement with random matrix statistics is restricted to short-range correlations, no more than a few level spacings, in particular in the tail of the spectrum. Inmore »
- Authors:
- Publication Date:
- Research Org.:
- State Univ. of New York (SUNY), Albany, NY (United States); Stony Brook Univ., NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC); Korea Institute of Advanced Study (KIAS)
- OSTI Identifier:
- 1781178
- Alternate Identifier(s):
- OSTI ID: 1849986; OSTI ID: 2280817
- Grant/Contract Number:
- FAG-88FR40388; FG02-88ER40388; 11874259; PG059602
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 103 Journal Issue: 10; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Astronomy & Astrophysics; Physics; Sachdev-Ye-Kitaev model; Lattice models in condensed matter; Field and string theory models and techniques; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
García-García, Antonio M., Jia, Yiyang, Rosa, Dario, and Verbaarschot, Jacobus J. M. Sparse Sachdev-Ye-Kitaev model, quantum chaos, and gravity duals. United States: N. p., 2021.
Web. doi:10.1103/PhysRevD.103.106002.
García-García, Antonio M., Jia, Yiyang, Rosa, Dario, & Verbaarschot, Jacobus J. M. Sparse Sachdev-Ye-Kitaev model, quantum chaos, and gravity duals. United States. https://doi.org/10.1103/PhysRevD.103.106002
García-García, Antonio M., Jia, Yiyang, Rosa, Dario, and Verbaarschot, Jacobus J. M. Mon .
"Sparse Sachdev-Ye-Kitaev model, quantum chaos, and gravity duals". United States. https://doi.org/10.1103/PhysRevD.103.106002.
@article{osti_1781178,
title = {Sparse Sachdev-Ye-Kitaev model, quantum chaos, and gravity duals},
author = {García-García, Antonio M. and Jia, Yiyang and Rosa, Dario and Verbaarschot, Jacobus J. M.},
abstractNote = {We study a sparse Sachdev-Ye-Kitaev (SYK) model with N Majoranas where only ~ kN independent matrix elements are nonzero. We identify a minimum k ≳ 1 for quantum chaos to occur by a level statistics analysis. The spectral density in this region, and for a larger k, is still given by the Schwarzian prediction of the dense SYK model, though with renormalized parameters. Similar results are obtained for a beyond linear scaling with N of the number of nonzero matrix elements. This is a strong indication that this is the minimum connectivity for the sparse SYK model to still have a quantum gravity dual. We also find an intriguing exact relation between the leading correction to moments of the spectral density due to sparsity and the leading 1/d correction of Parisi’s U(1) lattice gauge theory in a d -dimensional hypercube. In the k → 1 limit, different disorder realizations of the sparse SYK model show emergent random matrix statistics that for fixed N can be in any universality class of the tenfold way. The agreement with random matrix statistics is restricted to short-range correlations, no more than a few level spacings, in particular in the tail of the spectrum. In addition, emergent discrete global symmetries in most of the disorder realizations for k slightly below one give rise to 2m-fold degenerate spectra, with m being a positive integer. For k = 3/4, we observe a large number of such emergent global symmetries with a maximum 28-fold degenerate spectra for N = 26.},
doi = {10.1103/PhysRevD.103.106002},
journal = {Physical Review D},
number = 10,
volume = 103,
place = {United States},
year = {Mon May 03 00:00:00 EDT 2021},
month = {Mon May 03 00:00:00 EDT 2021}
}
https://doi.org/10.1103/PhysRevD.103.106002
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