How and why could an interacting system of many particles be described as if all particles
were independent and identically distributed? This question is at least as old as statistical …

We study the time evolution of the Nelson model in a mean-field limit in which N
nonrelativistic bosons weakly couple (with respect to the particle number) to a positive or …

Quasi-classical ground states. I. Linearly coupled Pauli–Fierz Hamiltonians Page 1 Doc. Math.
28 (2023), 1191–1233 DOI 10.4171/DM/929 © 2023 Deutsche Mathematiker-Vereinigung …

The purpose of this article is twofold. On one hand, we rigorously derive the Newton--
Maxwell equation in the Coulomb gauge from first principles of quantum electrodynamics in …

We consider a non-relativistic electron bound by an external potential and coupled to the
quantized electromagnetic field in the standard model of non-relativistic QED. We compute …

A spin (qubit) is in contact with a bosonic reservoir. The state of the reservoir contains a
parameter {\varepsilon} interpolating between quantum and classical reservoir features. We …

We study the dynamics of the three-dimensional polaron---a quantum particle coupled to
bosonic fields---in the quasi-classical regime. In this case, the fields are very intense and the …

We slightly extend prior results about the derivation of the Maxwell–Schrödinger equations
from the bosonic Pauli–Fierz Hamiltonian. More concretely, we show that the findings from …

We consider the quasi-classical limit of Nelson-type regularized polaron models describing
a particle interacting with a quantized bosonic field. We break translation-invariance by …

In this paper we study the semiclassical limit $\hslash\to 0$ of a completely solvable model
in quantum field theory: the van Hove model, describing a scalar field created and …