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Positronium and Quantum Hide-and-Seek: How to 'Push' a Photon to Uncover the Mystery ⚡ экспресс

Original: "Entangled photons from para-positronium decay: Do coincidences from scattered photons imply a Bell state?"
· Paul Joos, Peter Kling
arXiv:2606.31726 · 2026-06-30 · CC BY 4.0 · ⏱ 1 min · Quantum Physics
Scientists have found a way to prove that positronium decay creates perfectly entangled photons — through a clever experiment of 'pushing' light against electrons.
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When an electron and a positron meet, they briefly form a tiny atom — positronium. Its annihilation gives birth to two photons in a strange state: like two coins that always land on opposite sides. Scientists have figured out how to verify this quantum entanglement by 'pushing' photons against electrons — and this might open the door to new technologies.

🎯 Positronium is the lightest exotic 'atomic' system: it is 920 times lighter than hydrogen and decays in 0.1 nanoseconds.

Scientists
Christian DopplerD. B. McLaughlinDidier QuelozMichel MayorR. A. RossiterEmmy Noether
Tags
Standard Model spectroscopy entropy
Laws
second law of thermodynamicsDoppler effectNoether's theoremBekenstein-Hawking entropyMaxwell's equationsPlanck's law
Original: arXiv:2606.31726 · CC BY 4.0 · bridge42worlds