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Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review
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TY - JOUR
T1 - Semiclassical analysis of quantum asymptotic fields in the Yukawa theory
AU - Ammari, Zied
AU - Falconi, Marco
AU - Olivieri, Marco
N1 - Publisher Copyright: © 2023 Elsevier Inc.
PY - 2023/6
Y1 - 2023/6
N2 - In this article, we study the asymptotic fields of the Yukawa particle-field model of quantum physics in the semiclassical regime ℏ→0, with an interaction subject to an ultraviolet cutoff. We show that the transition amplitudes between final (respectively initial) states converge towards explicit quantities involving the outgoing (respectively incoming) wave operators of the nonlinear Schrödinger–Klein–Gordon (S-KG) equation. Thus, we rigorously link the scattering theory of the Yukawa model to that of the Schrödinger–Klein–Gordon equation. Moreover, we prove that the asymptotic vacuum states of the Yukawa model have a phase space concentration property around classical radiationless solutions. Under further assumptions, we show that the S-KG energy admits a unique minimizer modulo symmetries and we identify exactly the semiclassical measure of Yukawa ground states. Some additional consequences of asymptotic completeness are also discussed, and some further open questions are raised.
AB - In this article, we study the asymptotic fields of the Yukawa particle-field model of quantum physics in the semiclassical regime ℏ→0, with an interaction subject to an ultraviolet cutoff. We show that the transition amplitudes between final (respectively initial) states converge towards explicit quantities involving the outgoing (respectively incoming) wave operators of the nonlinear Schrödinger–Klein–Gordon (S-KG) equation. Thus, we rigorously link the scattering theory of the Yukawa model to that of the Schrödinger–Klein–Gordon equation. Moreover, we prove that the asymptotic vacuum states of the Yukawa model have a phase space concentration property around classical radiationless solutions. Under further assumptions, we show that the S-KG energy admits a unique minimizer modulo symmetries and we identify exactly the semiclassical measure of Yukawa ground states. Some additional consequences of asymptotic completeness are also discussed, and some further open questions are raised.
KW - Asymptotic fields
KW - Scattering theory
KW - Schrödinger-Klein-Gordon equation
KW - Semiclassical analysis
KW - Yukawa interaction
UR - http://www.scopus.com/inward/record.url?scp=85148005884&partnerID=8YFLogxK
U2 - 10.1016/j.jde.2023.01.037
DO - 10.1016/j.jde.2023.01.037
M3 - Journal article
AN - SCOPUS:85148005884
VL - 357
SP - 236
EP - 274
JO - Journal of Differential Equations
JF - Journal of Differential Equations
SN - 0022-0396
ER -