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We discuss the Hartree equation arising in the mean-field limit of large systems of bosons and explain its importance within the class of nonlinear Schroedinger equations. Of special interest to us is the Hartree equation with focusing…

Mathematical Physics · Physics 2007-05-23 Juerg Froehlich , Enno Lenzmann

We consider a system of N fermions in the mean-field regime interacting though an inverse power law potential $V(x)=1/|x|^{\alpha}$, for $\alpha\in(0,1]$. We prove the convergence of a solution of the many-body Schr\"{o}dinger equation to a…

Mathematical Physics · Physics 2018-01-10 Chiara Saffirio

This paper proves the validity of the joint mean-field and classical limit of the quantum $N$-body dynamics leading to the pressureless Euler-Poisson system for factorized initial data whose first marginal has a monokinetic Wigner measure.…

Analysis of PDEs · Mathematics 2019-12-17 François Golse , Thierry Paul

We consider a gas of weakly interacting bosons in three dimensions subject to an external potential in the mean field regime. Assuming that the initial state of our system is a product state, we show that in the trace topology of one-body…

Mathematical Physics · Physics 2024-05-01 Charlotte Dietze , Jinyeop Lee

We study the dynamics of a Fermi gas with a Coulomb interaction potential, and show that, in a mean-field limiting regime, the dynamics is described by the Hartree-Fock equation. This extends previous work of Bardos et al. to the case of…

Mathematical Physics · Physics 2011-08-30 Juerg Froehlich , Antti Knowles

We consider a quantum system constituted by $N$ identical particles interacting by means of a mean-field Hamiltonian. It is well known that, in the limit $N\to\infty$, the one-particle state obeys to the Hartree equation. Moreover,…

Mathematical Physics · Physics 2015-05-13 Federica Pezzotti , Mario Pulvirenti

We consider the many-body dynamics of fermions with Coulomb interaction in a mean-field scaling limit where the kinetic and potential energy are of the same order for large particle numbers. In the considered limit the spatial variation of…

Mathematical Physics · Physics 2017-05-26 Sören Petrat

We study the mean-field dynamics of a system of $N$ interacting bosons starting from an initially condensated state. For a broad class of mean-field Hamiltonians, including models with arbitrary bounded interactions and models with…

Mathematical Physics · Physics 2026-02-19 Matias Gabriel Ginzburg , Simone Rademacher , Giacomo De Palma

The main result in this paper is a new inequality bearing on solutions of the $N$-body linear Schr\"{o}dinger equation and of the mean field Hartree equation. This inequality implies that the mean field limit of the quantum mechanics of $N$…

Analysis of PDEs · Mathematics 2016-06-29 François Golse , Clément Mouhot , Thierry Paul

This paper discusses the mean-field limit for the quantum dynamics of $N$ identical bosons in $\mathbf R^3$ interacting via a binary potential with Coulomb type singularity. Our approach is based on the theory of quantum Klimontovich…

Mathematical Physics · Physics 2024-04-15 Immanuel Ben Porat , François Golse

The non-relativistic bosonic ground state is studied for quantum N-body systems with Coulomb interactions, modeling atoms or ions made of N "bosonic point electrons" bound to an atomic point nucleus of Z "electron" charges, treated in…

Mathematical Physics · Physics 2013-08-09 Michael K. -H. Kiessling

We study the many body quantum evolution of bosonic systems in the mean field limit. The dynamics is known to be well approximated by the Hartree equation. So far, the available results have the form of a law of large numbers. In this paper…

Mathematical Physics · Physics 2012-03-27 Gerard Ben Arous , Kay Kirkpatrick , Benjamin Schlein

We consider the time evolution of $N$ bosons in the mean field regime for factorized initial data. In the limit of large $N$, the many body evolution can be approximated by the non-linear Hartree equation. In this paper we are interested in…

Mathematical Physics · Physics 2014-01-29 Simon Buchholz , Chiara Saffirio , Benjamin Schlein

We consider the dynamics of a large quantum system of $N$ identical bosons in 3D interacting via a two-body potential of the form $N^{3\beta-1} w(N^\beta(x-y))$. For fixed $0\leq \beta <1/3$ and large $N$, we obtain a norm approximation to…

Mathematical Physics · Physics 2017-08-29 Phan Thành Nam , Marcin Napiórkowski

We consider the semi-relativistic system of $N$ gravitating Bosons with gravitation constant $G$. The time evolution of the system is described by the relativistic dispersion law, and we assume the mean-field scaling of the interaction…

Mathematical Physics · Physics 2013-03-07 Ji Oon Lee

In this paper the Hartree equation is derived from the $N$-body Schr\''odinger equation in the mean-field limit, with convergence rate estimates that are uniform in the Planck constant $\hbar$. Specifically, we consider the two following…

Analysis of PDEs · Mathematics 2018-07-03 François Golse , Thierry Paul , Mario Pulvirenti , Ois Franç , Thierry Golse , Mario Paul

The Bose-Hubbard model effectively describes bosons on a lattice with on-site interactions and nearest-neighbour hopping, serving as a foundational framework for understanding strong particle interactions and the superfluid to Mott…

Mathematical Physics · Physics 2025-03-19 Shahnaz Farhat , Denis Périce , Sören Petrat

We study the mean-field and semiclassical limit of the quantum many-body dynamics with a repulsive $\delta$-type potential $N^{3\beta}V(N^{\beta}x)$ and a Coulomb potential, which leads to a macroscopic fluid equation, the Euler-Poisson…

Analysis of PDEs · Mathematics 2025-07-01 Xuwen Chen , Shunlin Shen , Zhifei Zhang

We study the dynamics of many-body Fermi systems, for a class of initial data which are close to quasi-free states exhibiting a nonvanishing pairing matrix. We focus on the mean-field scaling, which for fermionic systems is naturally…

Mathematical Physics · Physics 2024-10-01 Stefano Marcantoni , Marcello Porta , Julien Sabin

We discuss the dynamics of an open two-mode Bose-Hubbard system subject to phase noise and particle dissipation. Starting from the full many-body dynamics described by a master equation the mean-field limit is derived resulting in an…

Other Condensed Matter · Physics 2008-09-12 F. Trimborn , D. Witthaut , S. Wimberger