A Note on the Binding Energy for Bosons in the Mean-field Limit

L Boßmann, N Leopold, D Mitrouskas… - Journal of Statistical …, 2024 - Springer
We consider a gas of N weakly interacting bosons in the ground state. Such gases exhibit
Bose–Einstein condensation. The binding energy is defined as the energy it takes to remove …

Asymptotic analysis of the weakly interacting Bose gas: a collection of recent results and applications

L Boßmann, N Leopold, D Mitrouskas… - Physics and the Nature of …, 2024 - Springer
We consider a gas of N bosons with interactions in the mean-field scaling regime. We review
a recent proof of the asymptotic expansion of its spectrum and eigenstates and two …

[HTML][HTML] Derivation of the Maxwell–Schrödinger equations: A note on the infrared sector of the radiation field

M Falconi, N Leopold - Journal of Mathematical Physics, 2023 - pubs.aip.org
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 …

[HTML][HTML] Norm approximation for the Fröhlich dynamics in the mean-field regime

N Leopold - Journal of Functional Analysis, 2023 - Elsevier
We study the time evolution of the Fröhlich Hamiltonian in a mean-field limit in which many
particles weakly couple to the quantized phonon field. Assuming that the particles are …

Convergence of states for polaron models in the classical limit

M Falconi, A Olgiati, N Rougerie - arXiv preprint arXiv:2311.05940, 2023 - arxiv.org
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 …

Expansion of the Many-body Quantum Gibbs State of the Bose-Hubbard Model on a Finite Graph

Z Ammari, S Farhat, S Petrat - arXiv preprint arXiv:2405.04055, 2024 - arxiv.org
We consider the many-body quantum Gibbs state for the Bose-Hubbard model on a finite
graph at positive temperature. We scale the interaction with the inverse temperature …

Renormalized Bogoliubov Theory for the Nelson Model

M Falconi, J Lampart, N Leopold… - arXiv preprint arXiv …, 2023 - arxiv.org
We consider the time evolution of the renormalized Nelson model, which describes $ N $
bosons linearly coupled to a quantized scalar field, in the mean-field limit of many particles …