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Article overview
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More on chaos at weak coupling | Rohit R. Kalloor
; Adar Sharon
; | Date: |
3 Jan 2023 | Abstract: | We discuss aspects of the quantum Lyapunov exponent $lambda_L$ in theories
with an exactly marginal SYK-like random interaction, where $lambda_L$ can be
computed as a continuous function of the interaction strength $mathcal{J}$. In
$1d$, we prove a conjecture from arXiv:2111.06108 which states that at small
$mathcal{J}$, $lambda_L$ can be found by considering a specific limit of the
four-point function in the decoupled theory. We then provide additional
evidence for the $2d$ version of this conjecture by discussing new examples of
Lyapunov exponents which can be computed at weak coupling. | Source: | arXiv, 2301.01353 | Services: | Forum | Review | PDF | Favorites |
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