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Geometry of effective field theory positivity cones
Quentin Bonnefoy, Vicente Cort\'es, Emanuele Gendy, Christophe Grojean, Karim Ritter von Merkl, Paula Naomi Pilatus
https://arxiv.org/abs/2508.18165

Geometry of effective field theory positivity cones
Positivity bounds are theoretical constraints on the Wilson coefficients of an effective field theory. These bounds emerge from the requirement that a given effective field theory must be the low-energy limit of a relativistic quantum theory that satisfies the fundamental principles of unitarity, locality, and causality. The task of deriving these bounds can be reformulated as the geometric problem of finding the extremal representation of a closed convex cone~$\mathcal C_W$. More precisely, in…

Molecular polaritons dynamics in realistic cavities
Carlos M. Bustamante, Franco P. Bonaf\'e, Maxim Sukharev, Michael Ruggenthaler, Abraham Nitzan, Angel Rubio
https://arxiv.org/abs/2508.18842

Molecular polaritons dynamics in realistic cavities
The large number of degrees of freedom involved in polaritonic chemistry processes considerably restricts the systems that can be described by any ab initio approach, due to the resulting high computational cost. Semiclassical methods that treat light classically offer a promising route for overcoming these limitations. In this work, we present a new implementation that combines the numerical propagation of Maxwell's equations to simulate realistic cavities with quantum electron dynamics at the…