Does gravity produce quantum weirdness? Proposal divides physicists

Physicists Richard Howl and Joseph Aziz from Royal Holloway, University of London, have proposed a controversial idea suggesting gravity could exhibit quantum effects without itself being a quantum theory. Their paper, published in Nature on October 22, argues against the simplistic view that entanglement through gravitational attraction implies a quantum nature for gravity. Instead, they suggest interactions between masses occur not only via the gravitational field but also through all matter fields, which can generate entanglement. This challenges previous assumptions and complicates efforts to reconcile gravity with quantum mechanics, one of physics' biggest mysteries.

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