Much ado about nothing: Vacuum and renormalization in the light-front framework

In the light-front (LF) formulation of quantum field theory, nontrivial vacuum structure can appear only in zero-modes. Integrating out zero-mode degrees of freedom leads to an effective LF Hamiltonian, which acts only on nonzero-modes and thus has a trivial vacuum, but is nevertheless equivalent to...

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Bibliographic Details
Published in:Nuclear physics. A 2000-05, Vol.670 (1), p.72-75
Main Author: Burkardt, M.
Format: Article
Language:English
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Summary:In the light-front (LF) formulation of quantum field theory, nontrivial vacuum structure can appear only in zero-modes. Integrating out zero-mode degrees of freedom leads to an effective LF Hamiltonian, which acts only on nonzero-modes and thus has a trivial vacuum, but is nevertheless equivalent to the Hamiltonian in normal coordinates (with nontrivial vacuum) since the nontrivial vacuum structure enters through the coefficients of the eff. LF Hamiltonian.
ISSN:0375-9474
DOI:10.1016/S0375-9474(00)00072-5