Scaling limit of a model of quantum electrodynamics

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14 Citations (Scopus)


This article gives a solution to an open problem in the paper by Arai [J. Math. Phys. 31, 2653 (1990)]. In it is presented an abstract asymptotic theory of families of unitary operators {script U(κ)}κ>0 and self-adjoint operators {Hκ}κ>0 acting in the tensor product of two Hilbert spaces. It is proven that H ren(V,κ), which represents a scaled total Hamiltonian of a coupled system of a one electron atom and a quantized radiation field, with parameters 0≤∈≤1, κ>0, and the electron mass renormalized, is unitarily equivalent to an operator H̃ ren(V,κ), which can be regarded as a decoupled Hamiltonian. Applying the abstract asymptotic theory and the unitary equivalence, it is proven that the resolvent of H ren(V,κ) strongly converges as κ→∞ to an operator which defines an effective potential of the electron. The effective potential is compared with that obtained in the paper mentioned above.

Original languageEnglish
Pages (from-to)4478-4516
Number of pages39
JournalJournal of Mathematical Physics
Issue number10
Publication statusPublished - 1993
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Mathematical Physics


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