Applications of large deviation theory in geophysical fluid dynamics and climate science

VM Gálfi, V Lucarini, F Ragone, J Wouters - La Rivista del Nuovo Cimento, 2021 - Springer
The climate is a complex, chaotic system with many degrees of freedom. Attaining a deeper
level of understanding of climate dynamics is an urgent scientific challenge, given the …

Scalable methods for computing sharp extreme event probabilities in infinite-dimensional stochastic systems

T Schorlepp, S Tong, T Grafke, G Stadler - Statistics and Computing, 2023 - Springer
We introduce and compare computational techniques for sharp extreme event probability
estimates in stochastic differential equations with small additive Gaussian noise. In …

Symmetries and zero modes in sample path large deviations

T Schorlepp, T Grafke, R Grauer - Journal of Statistical Physics, 2023 - Springer
Sharp large deviation estimates for stochastic differential equations with small noise, based
on minimizing the Freidlin–Wentzell action functional under appropriate boundary …

Spontaneous symmetry breaking for extreme vorticity and strain in the three-dimensional Navier–Stokes equations

T Schorlepp, T Grafke, S May… - … Transactions of the …, 2022 - royalsocietypublishing.org
We investigate the spatio-temporal structure of the most likely configurations realizing
extremely high vorticity or strain in the stochastically forced three-dimensional …

Anomalous scalings of fluctuations of the area swept by a Brownian particle trapped in a| x| potential

NR Smith - Physica A: Statistical Mechanics and its Applications, 2024 - Elsevier
We study the fluctuations of the area A=∫ 0 T x (t) dt under a one-dimensional Brownian
motion x (t) in a trapping potential∼| x|, at long times T→∞. We find that typical fluctuations …

Short-time large deviations of the spatially averaged height of a Kardar–Parisi–Zhang interface on a ring

T Schorlepp, P Sasorov… - Journal of Statistical …, 2023 - iopscience.iop.org
Short-time large deviations of the spatially averaged height of a Kardar–Parisi–Zhang interface
on a ring - IOPscience This site uses cookies. By continuing to use this site you agree to our …

[HTML][HTML] Eddy-viscous modeling and the topology of extreme circulation events in three-dimensional turbulence

GB Apolinário, L Moriconi, RM Pereira, VJ Valadão - Physics Letters A, 2022 - Elsevier
We discuss the role of particular velocity field configurations–instantons, for short–which are
supposed to dominate the flow during the occurrence of extreme turbulent circulation events …

Short-time large deviations of the spatially averaged height of a KPZ interface on a ring

T Schorlepp, P Sasorov, B Meerson - arXiv preprint arXiv:2307.03976, 2023 - arxiv.org
Using the optimal fluctuation method, we evaluate the short-time probability distribution $ P
(\bar {H}, L, t= T) $ of the spatially averaged height $\bar {H}=(1/L)\int_0^ L h (x, t= T)\, dx $ of …

Fast rare events in exit times distributions of jump processes

A Vezzani, R Burioni - Physical Review Letters, 2024 - APS
Rare events in the first-passage distributions of jump processes are capable of triggering
anomalous reactions or series of events. Estimating their probability is particularly important …

Instantons, Fluctuations, and Singularities in the Supercritical Stochastic Nonlinear Schrödinger Equation

S Bureković, T Schäfer, R Grauer - Physical Review Letters, 2024 - APS
Recently, Josserand et al. proposed a stochastic nonlinear Schrödinger model for finite-time
singularity-mediated turbulence [Phys. Rev. Fluids 5, 054607 (2020) PLFHBR 2469-990X …