2008
DOI: 10.1016/j.crma.2008.09.015
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Le problème infrarouge pour l'électron habillé non relativiste dans un champ magnétique

Abstract: International audienceNous considérons un électron non relativiste interagissant avec un champ magnétique classique dans la direction $x_3$ et un champ électromagnétique quantifié. Le système est invariant par translation suivant $x_3$ et l'Hamiltonien correspondant admet une décomposition $H \simeq \int^\oplus_\mathbb{R} H(P_3) dP_3$. Pour une impulsion $P_3$ fixée suffisamment petite, nous montrons que $H(P_3)$ possède un état fondamental dans la représentation Fock si et seulement si $E'(P_3) = 0$, où $P_3 … Show more

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“…The same results (the absence of a ground state in Fock space, and the existence of a ground state in a non-Fock representation) are proven in [AFGG1,AFGG2], for a dressed non-relativistic electron which interacts with a classical magnetic field, following an approach different from [CF]. We expect that the method of [AFGG2] can be adapted to prove the existence of a ground state for a renormalized Hamiltonian (in a non-Fock representation) associated with the dressed helium ion He + , at a fixed total momentum.…”
Section: Introductionsupporting
confidence: 65%
“…The same results (the absence of a ground state in Fock space, and the existence of a ground state in a non-Fock representation) are proven in [AFGG1,AFGG2], for a dressed non-relativistic electron which interacts with a classical magnetic field, following an approach different from [CF]. We expect that the method of [AFGG2] can be adapted to prove the existence of a ground state for a renormalized Hamiltonian (in a non-Fock representation) associated with the dressed helium ion He + , at a fixed total momentum.…”
Section: Introductionsupporting
confidence: 65%