Physicists are revisiting #unitarity, a principle of determinism that is core to quantum mechanics in its usual formulation. An expanding universe creates new possibilities, so it’s not clear how the present state could fully determine the past or future state. An alternative principle, isometry, may be more appropriate. Great piece by @charliewood for #QuantaMagazine. https://www.quantamagazine.org/physicists-rewrite-a-quantum-rule-that-clashes-with-our-universe-20220926/

Physicists Rewrite a Quantum Rule That Clashes With Our Universe
The past and future are tightly linked in conventional quantum mechanics. A tweak could let quantum possibilities increase as space expands.

https://www.wired.com/story/physicists-rewrite-a-quantum-rule-that-clashes-with-our-universe/

#quantum #physics #unitarity

Physicists Rewrite a Quantum Rule That Clashes With Our Universe - The past and future are tightly linked in conventional quantum mechanics. A tweak could l... - https://www.wired.com/story/physicists-rewrite-a-quantum-rule-that-clashes-with-our-universe/ #science/physicsandmath #unitarity #science