Mean-Field Dynamics for the Nelson Model with Fermions

@article{Leopold2018MeanFieldDF,
  title={Mean-Field Dynamics for the Nelson Model with Fermions},
  author={Nikolai Leopold and Soren Petrat},
  journal={Annales Henri Poincar{\'e}},
  year={2018},
  volume={20},
  pages={3471 - 3508}
}
We consider the Nelson model with ultraviolet cutoff, which describes the interaction between non-relativistic particles and a positive or zero mass quantized scalar field. We take the non-relativistic particles to obey Fermi statistics and discuss the time evolution in a mean-field limit of many fermions. In this case, the limit is known to be also a semiclassical limit. We prove convergence in terms of reduced density matrices of the many-body state to a tensor product of a Slater determinant… 

Derivation of the Landau–Pekar Equations in a Many-Body Mean-Field Limit

The Fröhlich Hamiltonian is considered in a mean-field limit where many bosonic particles weakly couple to the quantized phonon field and it is shown that the dynamics of the system is approximately described by the Landau–Pekar equations.

Bogoliubov Dynamics and Higher-order Corrections for the Regularized Nelson Model

We study the time evolution of the Nelson model in a mean-field limit in which N nonrelativistic bosons weakly couple (w.r.t. the particle number) to a positive or zero mass quantized scalar field.

Norm approximation for the Fr\"ohlich dynamics in the mean-field regime

We study the time evolution of the Fr¨ohlich Hamiltonian in a mean-field limit in which many particles weakly couple to the quantized phonon field. Assuming that the particles are initially in a

Landau–Pekar equations and quantum fluctuations for the dynamics of a strongly coupled polaron

We consider the Frohlich Hamiltonian with large coupling constant $\alpha$. For initial data of Pekar product form with coherent phonon field and with the electron minimizing the corresponding

Towards a derivation of Classical ElectroDynamics of charges and fields from QED

. 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 agreement with the

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

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 Leopold and Pickl

The Landau–Pekar equations : adiabatic theorem and accuracy

We prove an adiabatic theorem for the Landau-Pekar equations. This allows us to derive new results on the accuracy of their use as effective equations for the time evolution generated by the Frohlich

D ec 2 01 9 An optimal semiclassical bound on certain commutators

We prove an optimal semiclassical bound on the trace norm of the following commutators [1(−∞,0](H~), x], [1(−∞,0](H~),−i~∇] and [1(−∞,0](H~), e], where H~ is a Schrödinger operator with a

An optimal semiclassical bound on certain commutators

We prove an optimal semiclassical bound on the trace norm of the following commutators $[\boldsymbol{1}_{(-\infty,0]}(H_\hbar),x]$, $[\boldsymbol{1}_{(-\infty,0]}(H_\hbar),-i\hbar\nabla]$ and

An optimal semiclassical bound on commutators of spectral projections with position and momentum operators

We prove an optimal semiclassical bound on the trace norm of the following commutators [1(-∞,0](Hħ),x]\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts}

References

SHOWING 1-10 OF 56 REFERENCES

Partially Classical Limit of the Nelson Model

Abstract.We consider the Nelson model which describes a quantum system of nonrelativistic identical particles coupled to a possibly massless scalar Bose field through a Yukawa type interaction. We

Mean–Field Evolution of Fermionic Systems

The mean field limit for systems of many fermions is naturally coupled with a semiclassical limit. This makes the analysis of the mean field regime much more involved, compared with bosonic systems.

Classical limit of the Nelson model with cutoff

In this paper we analyze the classical limit of the Nelson model with cutoff, when both non-relativistic and relativistic particles number goes to infinity. We prove convergence of quantum

Mean Field Evolution of Fermions with Coulomb Interaction

We study the many body Schrödinger evolution of weakly coupled fermions interacting through a Coulomb potential. We are interested in a joint mean field and semiclassical scaling, that emerges

Mean-field dynamics of fermions with relativistic dispersion

We extend the derivation of the time-dependent Hartree-Fock equation recently obtained by Benedikter et al. [“Mean-field evolution of fermionic systems,” Commun. Math. Phys. (to be published)] to

The classical field limit of scattering theory for non-relativistic many-boson systems. II

We study the classical field limit of non relativistic many-boson theories in space dimensionn≧3, extending the results of a previous paper to more singular interactions. We prove the expected

Hartree corrections in a mean-field limit for fermions with Coulomb interaction

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

Effective N-Body Dynamics for the Massless Nelson Model and Adiabatic Decoupling without Spectral Gap

Abstract. The Schrödinger equation for N particles interacting through effective pair potentials is derived from the massless Nelson model with ultraviolet cutoffs. We consider a scaling limit where

Interaction of Nonrelativistic Particles with a Quantized Scalar Field

We demonstrate the mathematical existence of a meson theory with nonrelativistic nucleons. A system of Schrodinger particles is coupled to a quantized relativistic scalar field. If a cutoff is put on

Mean-field evolution of fermions with singular interaction

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
...