Towards the end of 2011, Pusey, Barrett and Rudolph derived a theorem that aimed to show
that the quantum state must be ontic (a state of reality) in a broad class of realist approaches …

At a fundamental level, the classical picture of the world is dead, and has been dead now for
almost a century. Pinning down exactly which quantum phenomena are responsible for this …

At the heart of quantum mechanics lies the wave function, a powerful but mysterious
mathematical object which has been a hot topic of debate from its earliest stages. Covering …

Finding quantitative aspects of quantum phenomena which cannot be explained by any
classical model has foundational importance for understanding the boundary between …

Huw Price has proposed an argument that suggests a time symmetric ontology for quantum
theory must necessarily be retrocausal, ie it must involve influences that travel backwards in …

Efficient scaling and flexible control are key aspects of useful quantum computing hardware.
Spins in semiconductors combine quantum information processing with electrons, holes or …

Quantum mechanics is an outstandingly successful description of nature, underpinning
fields from biology through chemistry to physics. At its heart is the quantum wavefunction, the …

A high-spin nucleus coupled to a color center can act as a long-lived memory qudit in a spin-
photon interface. The germanium vacancy (GeV) in diamond has attracted recent attention …

In quantum mechanics, the wave function predicts probabilities of possible measurement
outcomes, but not which individual outcome is realized in each run of an experiment. This …

Bell's theorem proves the existence of entangled quantum states with no classical
counterpart. An experimental violation of Bell's inequality demands simultaneously high …