The Oxford Questions on the foundations of quantum physics

TL;DR

This paper discusses fundamental questions in quantum physics and relativity, exploring whether current theories are conceptually secure or fundamentally unresolved, and considers the possibility of a unifying theory.

Contribution

It presents a collection of key questions and debates on the foundations of quantum physics and relativity, highlighting recent experimental insights and ongoing controversies.

Findings

Experimental advances are challenging traditional interpretations.

Some foundational issues remain unresolved and controversial.

The possibility of a unified theory is still open and actively explored.

Abstract

The twentieth century saw two fundamental revolutions in physics -- relativity and quantum. Daily use of these theories can numb the sense of wonder at their immense empirical success. Does their instrumental effectiveness stand on the rock of secure concepts or the sand of unresolved fundamentals? Does measuring a quantum system probe, or even create, reality, or merely change belief? Must relativity and quantum theory just co-exist or might we find a new theory which unifies the two? To bring such questions into sharper focus, we convened a conference on Quantum Physics and the Nature of Reality. Some issues remain as controversial as ever, but some are being nudged by theory's secret weapon of experiment.