Quantum Field Theory and the Limits of Reductionism

TL;DR

This paper questions the universal validity of reductionism in quantum field theory, proposing that the symmetry in scale relations and alternative models could support a non-reductionist perspective.

Contribution

It introduces the idea that QFT's reversible renormalization group flow allows for non-reductionist approaches and explores models implementing this concept.

Findings

Reversible RG flow at non-fixed points suggests non-reductionist possibilities.

Conceptual problems in QFT may be addressed through alternative non-reductionist frameworks.

Specific models demonstrate potential for non-reductionist interpretations in QFT.

Abstract

I suggest that the current situation in quantum field theory (QFT) provides some reason to question the universal validity of ontological reductionism. I argue that the renormalization group flow is reversible except at fixed points, which makes the relation between large and small distance scales quite symmetric in QFT, opening up at least the technical possibility of a non-reductionist approach to QFT. I suggest that some conceptual problems encountered within QFT may potentially be mitigated by moving to an alternative picture in which it is no longer the case that the large supervenes on the small. Finally, I explore some specific models in which a form of non-reductionism might be implemented, and consider the prospects for future development of these models.