This account becomes now private. WlvPhySoc closes down, but physics lives on in our hearts π I'm a condensed matter physicist and possibly a cat enthusiast πΊ
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ALT We show that boson correlations from quantum states with a Glauber-Sudarshan representation of their density matrix which provides a well-behaved probability distribution β including coherent states, thermal states, and all states that can be deemed classical β are a manifestation of the Simpson paradox: they are spurious correlations from statistical (ensemble) averages over uncorrelated measurements made in varying geometries, due to a process of symmetry-breaking as a confounding factor. Bosonic correlations encoded by the wavefunction appear to be formed in the geometry assumed, which however is not that of the statistical ensemble but varies from realization to realization. This calls to distinguish between quantum and statistical averages and sheds new understandings on the fundamental problems of nonclassicality and quantum advantage.
ALT Image of the PLANCKS logo with text PLANCKS UK and Ireland Preliminaries Swansea 2025.
ALT The Physical Review journals would like to congratulate John J. Hopfield of Princeton University and Geoffrey E. Hinton of the University of Toronto for sharing the 2024 Nobel Prize in Physics. The prize was awarded for βfoundational discoveries and inventions that enable machine learning with artificial neural networks.
