1993/04/19 by Don N. Page · 13 citations
Physics and Astronomy · #Asymmetry #CPT symmetry #Classical mechanics #Cosmology and Gravitation Theories #Invariant (physics) #Mathematical physics #Noncommutative and Quantum Gravity Theories #Physics #Quantum #Quantum Mechanics and Applications #Quantum decoherence #Quantum dissipation #Quantum dynamics #Quantum mechanics #Quantum process #Theoretical physics #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevlett.70.4034
published in Physical Review Letters 70(26), 4034-4037 (American Physical Society) · 14 pages, Alberta-Thy-11-93
arxiv created 1993/04/19 · openalex publication_date 1993/06/28 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
With CPT-invariant initial conditions that commute with CPT-invariant final conditions, the respective probabilities (when defined) of a set of histories and its CPT reverse are equal, giving a CPT-symmetric universe. This leads me to question whether the asymmetry of the Gell-Mann--Hartle decoherence functional for ordinary quantum mechanics should be interpreted as an asymmetry of time.