192 citations · 1k across the 35 of their papers we have counts for
24 papers · 1 filter
Whose Projection Postulate?
Anthony Sudbery
The projection postulate is a description of the effect on a quantum system, assumed to be in a pure state, of a measurement of an observable with a discrete spectrum, in nonrelati…
Is there a classical model of Wigner's friend?
Anthony Sudbery
"Wigner's friend" refers to a quantum process of which different observers, following the rules of quantum mechanics, give contradictory descriptions. Lostaglio and Bowles have rec…
Histories without collapse
Anthony Sudbery
This paper is a comparison of two theories of the probability of a history in quantum mechanics. One is derived from Copenhagen quantum mechanics using the projection postulate and…
Comment on "Understanding the Frauchiger-Renner argument" by Jeffrey Bub
Anthony Sudbery
Bub has recently claimed that the Frauchiger-Renner argument does not require an assumption that the state vector undergoes projection after measurement. It is shown that this clai…
The hidden assumptions of Frauchiger and Renner
Anthony Sudbery
This note is a critical examination of the argument of Frauchiger and Renner (Nature Communications 9:3711 (2018)), in which they claim to show that three reasonable assumptions ab…
Single-world theory of the extended Wigner's world experiment
Anthony Sudbery
Frauchiger and Renner have recently claimed to prove that "Single-world interpretations of quantum theory cannot be self-consistent". This is contradicted by a construction due to…