Comments on "Minimal Model for Fast Scrambling"

TL;DR

This paper demonstrates that a specific spin chain model with certain interactions acts as a fast scrambler, providing a smaller alternative to previously proposed minimal models for fast scrambling.

Contribution

It introduces a new, smaller spin chain model with tailored symmetry blocks that functions as a fast scrambler, expanding the understanding of minimal models in quantum chaos.

Findings

The model exhibits fast scrambling behavior.

It is smaller than the previously proposed minimal model.

The Hamiltonian is constructed from specific symmetry blocks.

Abstract

I consider a spin chain with nearest-neighbor and next nearest-neighbor interactions. I show that the Hamiltonian obtained by specifying the desired combination of symmetry blocks is a fast scrambler. This is a smaller model than the "minimal model" by Belyansky et al..