3 papers
math.AP2025
Renormalization of a 1d quadratic Schr{ö}dinger model with additive noise
Aurélien Deya, Reika Fukuizumi, Laurent Thomann
The study is devoted to the interpretation and wellposedness of the stochastic NLS model \begin{equation*} (\imath \partial_t-Î)u=|u|^2+\dot{B}, \quad u_0=0,\quad \quad t\in \math…
math.AP2025
On the 1d stochastic Schr{ö}dinger product
Aurélien Deya
We exhibit various restrictions about the wellposedness of the Schr{\''o}dinger product $$\cl:z \longmapsto -\imath \int\_0^t e^{\imath s {\cop \partial^2\_x}}\big( z\_s\cdot Ψ\_s…
math.PR2025
On the parabolic model for the harmonic oscillator: diagrams and local existence
Aurélien Deya, Reika Fukuizumi, Laurent Thomann
We prove the local wellposedness of the (renormalized) parabolic model associated with the harmonic oscillator on , that is, the equation formally written as…