Abstract
The Rohde–Schramm theorem states that Schramm–Loewner Evolution with parameter κ (or SLEκ for short) exists as a random curve, almost surely, if κ ≠ 8. Here we give a new and concise proof of the result, based on the Liouville quantum gravity coupling (or reverse coupling) with a Gaussian free field. This transforms the problem of estimating the derivative of the Loewner flow into estimating certain correlated Gaussian free fields. While the correlation between these fields is not easy to understand, a surprisingly simple argument allows us to recover a derivative exponent first obtained by Rohde and Schramm [14], subsequently shown to be optimal by Lawler and Viklund [17], which then implies the Rohde–Schramm theorem.
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The first author’s research was supported in part by EPSRC grants EP/L018896/1 and EP/I03372X/1.
The second author was a PhD student while this work was taking place, funded by EPSRC grant EP/H023348/1.
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Berestycki, N., Jackson, H. The Rohde–Schramm theorem via the Gaussian free field. Isr. J. Math. 228, 973–999 (2018). https://doi.org/10.1007/s11856-018-1789-7
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DOI: https://doi.org/10.1007/s11856-018-1789-7