Abstract
It is well known that stochastic processes on fractal spaces or in certain random media exhibit anomalous heat kernel behaviour. One manifestation of such irregular behaviour is the presence of fluctuations in the short- or long-time asymptotics of the on-diagonal heat kernel. In this note, we review some examples for which such fluctuations are known to occur, including Brownian motion on certain deterministic or random fractals, and simple random walks on various examples of random graph trees, such as the incipient infinite cluster of critical percolation on a regular tree and low-dimensional uniform spanning trees. We also announce some new results that add the one-dimensional Bouchaud trap model to this class of examples.
In memory of Professor Robert Strichartz
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Acknowledgements
This research was supported by JSPS Grant-in-Aid for Scientific Research (A) 22H00099, JSPS Grant-in-Aid for Scientific Research (C) 19K03540, and the Research Institute for Mathematical Sciences, an International Joint Usage/Research Center located in Kyoto University.
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Andres, S., Croydon, D., Kumagai, T. (2023). Heat Kernel Fluctuations for Stochastic Processes on Fractals and Random Media. In: Alonso Ruiz, P., Hinz, M., Okoudjou, K.A., Rogers, L.G., Teplyaev, A. (eds) From Classical Analysis to Analysis on Fractals. Applied and Numerical Harmonic Analysis. Birkhäuser, Cham. https://doi.org/10.1007/978-3-031-37800-3_12
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