Hannover 2016 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 8: Quantum Information: Concepts and Methods II
Q 8.4: Talk
Monday, February 29, 2016, 15:15–15:30, e214
Testing an axiom of quantum theory: Which measurements are admissible? — •Matthias Kleinmann1 and Adán Cabello2 — 1University of the Basque Country, Bilbao, Spain — 2Universidad de Sevilla, Sevilla, Spain
Quantum theory is not particularly complicated when it comes to the question of admissible measurements: A measurement is admissible as long as it does not contradict the rules of probability. We confront this assumption with an alternative, minimalistic construction, where quantum measurements with any number of outcomes are generated from quantum measurements with only two outcomes. The predictions of this alternative are vastly identically to quantum theory, except for specialized high-precision Bell-like scenarios. In fact, experimental data of such experiments already provide evidence that correlations in nature are not emerging from measurements with only two or three outcomes. In addition, it is also possible to confront quantum theory with another challenge. A large class of generalized models makes predictions that are in conflict with quantum theory and allows for experiments on quantum systems that would rule out such ``post-quantum'' models.