Artificial dynamical effects in quantum field theory

Brodsky, Stanley J.; Deur, Alexandre; Roberts, Craig D.

doi:10.1038/s42254-022-00453-3

Title: Artificial dynamical effects in quantum field theory

Journal Article · Mon May 09 00:00:00 EDT 2022 · Nature Reviews Physics

DOI:https://doi.org/10.1038/s42254-022-00453-3· OSTI ID:1869245

; Deur, Alexandre; Roberts, Craig D.

In Newtonian mechanics, studying a system in a non-Galilean reference frame can lead to inertial pseudoforces appearing, such as the centrifugal force that seems to arise in dynamics analysed in a rotating frame. Likewise, artificial effects may arise in relativistic quantum field theory (QFT) if a system is studied in a framework that violates Poincaré invariance. In this Perspective, we highlight how such issues complicate the traditional canonical quantization of QFTs and can lead to a subjective description of natural phenomena. By contrast, the treatment of the same problem using light-front quantization is free from spurious pseudoeffects because Poincaré invariance is effectively preserved for all practical intents and purposes. We illustrate these statements using several examples: the Gerasimov–Drell–Hearn (GDH) relation, a fundamental feature of QFT; the absence of any measurable impact of Lorentz contraction in high-energy collisions; and the fictitious character of vacuum fluctuation contributions to the cosmological constant.

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Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

DOE Contract Number:: AC05-06OR23177; AC02-76SF00515

OSTI ID:: 1869245

Report Number(s):: JLAB-PHY-21-3526; DOE/OR/23177-5358

Journal Information:: Nature Reviews Physics, Journal Name: Nature Reviews Physics; ISSN 2522-5820

Country of Publication:: United States

Language:: English

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