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Derivation of the Maxwell-Schr\"odinger and Vlasov-Maxwell Equations from Non-Relativistic QED

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arxiv 2411.07085 v1 pith:K22VPSVF submitted 2024-11-11 math-ph math.APmath.MP

classification math-phmath.APmath.MP
keywords equationshamiltonianinitiallimitmaxwell-schrnon-relativisticodingerpauli-fierz
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We study the spinless Pauli-Fierz Hamiltonian in a semiclassical mean-field limit of many fermions. For appropriate initial conditions, we prove, in the trace norm topology of reduced density matrices, that the many-body quantum state converges to a tensor product of a semiclassically structured Slater determinant and a coherent photon state. These evolve according to a fermionic variant of the Maxwell-Schr\"odinger equations. By combining this result with [arXiv:2308.16074] through a suitable regularization of the initial data, we further show that, in the limit of large particle number, the dynamics of the Pauli-Fierz Hamiltonian can be approximately described by the non-relativistic Vlasov--Maxwell system for extended charges.

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  1. Derivation of the time-dependent Hartree equations for strongly interacting dense fermionic systems

    math-ph 2025-07 conditional novelty 8.0 of 10

    The rescaled Schrödinger dynamics of N dense fermions with C^2 pair interactions converges to the time-dependent Hartree dynamics with explicit rate N^{-1/24}.

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