Phys. Rev. Lett. 74, 3715–3719 (1995)Linearly Positive Histories: Probabilities for a Robust Family of Sequences of Quantum EventsReceived 29 March 1994; published in the issue dated 8 May 1995 Non-negative probabilities that obey the sum rules may be assigned to a much wider family of sets of histories than decohering histories. The resulting linearly positive histories avoid the highly restrictive decoherence conditions and yet give the same probabilities when those conditions apply. Thus linearly positive histories are a broad extension of decohering histories. Moreover, the resulting theory is manifestly time-reversal invariant. © 1995 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.74.3715
DOI:
10.1103/PhysRevLett.74.3715
PACS:
03.65.Ca, 03.65.Bz, 11.30.Er, 98.80.Hw
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