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preprint

The dynamical sine-Gordon model in the full subcritical regime

Chandra, Ajay
•
Hairer, Martin  
•
Shen, Hao
August 8, 2018

We prove that the dynamical sine-Gordon equation on the two dimensional torus introduced in [HS16] is locally well-posed for the entire subcritical regime. At first glance this equation is far out of the scope of the local existence theory available in the framework of regularity structures [Hai14, BHZ16, CH16, BCCH17] since it involves a non-polynomial nonlinearity and the solution is expected to be a distribution (without any additional small parameter as in [FG17, HX18]). In [HS16] this was overcome by a change of variable, but the new equation that arises has a multiplicative dependence on highly non-Gaussian noises which makes stochastic estimates highly non-trivial - as a result [HS16] was only able to treat part of the subcritical regime. Moreover, the cumulants of these noises fall out of the scope of the later work [CH16]. In this work we systematically leverage "charge" cancellations specific to this model and obtain stochastic estimates that allow us to cover the entire subcritical regime.

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Type
preprint
DOI
10.48550/arXiv.1808.02594
ArXiv ID

1808.02594v1

Author(s)
Chandra, Ajay
Hairer, Martin  

EPFL

Shen, Hao
Date Issued

2018-08-08

Subjects

Mathematics - Probability

•

Mathematical Physics

•

Mathematics - Analysis of PDEs

•

Mathematics - Mathematical Physics

Subjects arXiv

math.PR

•

math-ph

•

math.AP

•

math.MP

Written at

OTHER

EPFL units
PROPDE  
Available on Infoscience
September 19, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/241318
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