Artificial dynamical effects in quantum field theory

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