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Comment on a suggested Kochen-Specker test
R. L. Schafir
A suggestion for an observational test of the difference between quantum mechanics and noncontextual hidden variables theories requires the measurement of a product of two commutin…
Comment on an alleged refutation of non-locality
R. L. Schafir
A recent claim (Deutsch and Hayden (2000)), that non-locality can be refuted by considering the evolution of the system in the Heisenberg picture, is denied. What they demonstrated…
Can a quantum measurement be cancelled in a very short period of time?
R. L. Schafir
A test is suggested for whether the obtaining of certain information, and then deleting it too quickly to be retained, constitutes a quantum measurement of that information.
The N-box paradox in orthodox quantum mechanics
Conall Boyle, Roger Schafir
The prediction of the N-box paradox, that whichever box is opened will contain the record of the particle having passed through it, is traced to a failure to specify whether the ot…
A delayed-choice thought-experiment with later-time entanglement
C. F. Boyle, R. L. Schafir
It is possible to find the nonlocality type of correlations between particle pairs retrospectively, matched with the outcomes of a future entangling measurement. But this does not…
Remarks on Noncontextual Hidden Variables and Physical Measurements
C. F. Boyle, R. L. Schafir
Kent [quant-ph/9906006] has constructed a hidden variable theory by taking the finite precision of physical measurements into account. But its claim to noncontextuality has been qu…