Traversable wormhole dynamics on a quantum processor

D Jafferis, A Zlokapa, JD Lykken, DK Kolchmeyer… - Nature, 2022‏ - nature.com
The holographic principle, theorized to be a property of quantum gravity, postulates that the
description of a volume of space can be encoded on a lower-dimensional boundary. The …

Operator complexity: a journey to the edge of Krylov space

E Rabinovici, A Sánchez-Garrido, R Shir… - Journal of High Energy …, 2021‏ - Springer
A bstract Heisenberg time evolution under a chaotic many-body Hamiltonian H transforms
an initially simple operator into an increasingly complex one, as it spreads over Hilbert …

A Cordial Introduction to Double Scaled SYK

M Berkooz, O Mamroud - Reports on Progress in Physics, 2024‏ - iopscience.iop.org
We review recent progress regarding the double scaled Sachdev-Ye-Kitaev model and
other p-local quantum mechanical random Hamiltonians. These models exhibit an …

Operator delocalization in quantum networks

J Kim, J Murugan, J Olle, D Rosa - Physical Review A, 2022‏ - APS
We investigate the delocalization of operators in nonchaotic quantum systems whose
interactions are encoded in an underlying graph or network. In particular, we study how fast …

A sparse model of quantum holography

S Xu, L Susskind, Y Su, B Swingle - arxiv preprint arxiv:2008.02303, 2020‏ - arxiv.org
We study a sparse version of the Sachdev-Ye-Kitaev (SYK) model defined on random
hypergraphs constructed either by a random pruning procedure or by randomly sampling …

Sparsity-Independent Lyapunov Exponent in the Sachdev-Ye-Kitaev Model

AM García-García, C Liu, JJM Verbaarschot - Physical Review Letters, 2024‏ - APS
The saturation of a recently proposed universal bound on the Lyapunov exponent has been
conjectured to signal the existence of a gravity dual. This saturation occurs in the low …

Quantum chaos in the sparse SYK model

P Orman, H Gharibyan, J Preskill - arxiv preprint arxiv:2403.13884, 2024‏ - arxiv.org
The Sachdev-Ye-Kitaev (SYK) model is a system of $ N $ Majorana fermions with random
interactions and strongly chaotic dynamics, which at low energy admits a holographically …

Out-of-time-order correlators and Lyapunov exponents in sparse SYK

E Cáceres, T Guglielmo, B Kent… - Journal of High Energy …, 2023‏ - Springer
A bstract We use a combination of analytical and numerical methods to study out-of-time
order correlators (OTOCs) in the sparse Sachdev-Ye-Kitaev (SYK) model. We find that at a …

Binary-coupling sparse Sachdev-Ye-Kitaev model: An improved model of quantum chaos and holography

M Tezuka, O Oktay, E Rinaldi, M Hanada, F Nori - Physical review B, 2023‏ - APS
The sparse version of the Sachdev-Ye-Kitaev (SYK) model reproduces essential features of
the original SYK model while reducing the number of disorder parameters. In this Research …

Optimizing strongly interacting fermionic Hamiltonians

MB Hastings, R O'Donnell - Proceedings of the 54th annual ACM …, 2022‏ - dl.acm.org
The fundamental problem in much of physics and quantum chemistry is to optimize a low-
degree polynomial in certain anticommuting variables. Being a quantum mechanical …