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20 April 2024

» arxiv » 1702.8462

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Energy diffusion and the butterfly effect in inhomogeneous Sachdev-Ye-Kitaev chains
Yingfei Gu ; Andrew Lucas ; Xiao-Liang Qi ;
Date:	27 Feb 2017
Abstract:	We compute the energy diffusion constant $D$, Lyapunov time $ au_{ ext{L}}$ and butterfly velocity $v_{ ext{B}}$ in an inhomogeneous chain of coupled Majorana Sachdev-Ye-Kitaev (SYK) models in the large $N$ and strong coupling limit. We find $Dle v_{ ext{B}}^2 au_{ ext{L}}$ from a combination of analytical and numerical approaches. Our example necessitates the sharpening of postulated transport bounds based on quantum chaos.
Source:	arXiv, 1702.8462
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