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Can a Localised Quantum System See Soft Photons? by Kolekar, Sanved; Louko, Jorma is a scholarly article available to read on EtoBox.

What is Can a Localised Quantum System See Soft Photons? about?

We ask whether soft photons, defined by asymptotic charges, can have consequences for the outcome of localised quantum processes. We consider a spatially localised two-state system, at rest in flat spacetime, coupled to a $U(1)$ gauge invariant charged scalar field. We find that the system's de-excitation rate does depend on the soft charges that correspond to the radial component of the electric field dressing at the asymptotic infinity; the excitation rate, by contrast, remains zero, regardless of the soft charges. Some implications are discussed.

Author

Kolekar, Sanved; Louko, Jorma

Published

2021

Language

EN