The Unreasonable Effectiveness of Quantum Field Theory

TL;DR

Quantum field theory is a highly effective framework for describing and predicting a wide array of physical phenomena with remarkable accuracy, though some physicists remain skeptical about its foundational aspects.

Contribution

This paper critically examines the widespread success and the ongoing doubts surrounding quantum field theory, highlighting its unparalleled practical effectiveness.

Findings

Quantum field theory successfully explains many physical phenomena.

It has passed all experimental tests of the standard model.

Some physicists question its foundational basis.

Abstract

Quantum field theory offers physicists a tremendously wide range of application; it is both a language with which a vast variety of physical processes can be discussed and also it provides a model for fundamental physics, the so-called ``standard-model,'' which thus far has passed every experimental test. No other framework exists in which one can calculate so many phenomena with such ease and accuracy. Nevertheless, today some physicists have doubts about quantum field theory, and here I want to examine these reservations.