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Lessons from discrete light-cone quantization for physics at null infinity: bosons in two dimensions

par Barnich, Glenn ;Majumdar, Sucheta ;Speziale, Simone;Tan, Wendi
Référence Journal of High Energy Physics, 2024, 5
Publication Publié, 2024-05

Article révisé par les pairs

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Résumé :

A bstract Motivated by issues in the context of asymptotically flat spacetimes at null infinity, we discuss in the simplest example of a free massless scalar field in two dimensions several subtleties that arise when setting up the canonical formulation on a single or on two intersecting null hyperplanes with a special emphasis on the infinite-dimensional global and conformal symmetries and their canonical generators, the free data, a consistent treatment of zero modes, matching conditions, and implications for quantization of massless versus massive fields.