Mittwoch, 04. Dezember 2019, 18:00 - 20:00 iCal

Ehrenfest award ceremony for Quantum Foundations

Award ceremony for the most significant paper in foundations of quantum physics, followed by a talk

Lise-Meitner-Hörsaal an der Fakultät für Physik
Boltzmanngasse 5 / Strudlhofgasse 4, 1090 Wien


Physicists of all fields and physics students are invited to join the Ehrenfest award ceremony on the 4th of December, followed by a talk by the authors and refreshments. The winner of the Paul Ehrenfest Best Paper Award for Quantum Foundations for the year 2018 is:


Almost Quantum Correlations

By Miguel Navascués, Yelena Guryanova, Matty J. Hoban, and Antonio Acín

Nature Communications 6, 6288 (2015).


The committee awarded the prize to Navascues et al. "for the theoretical discovery of a natural set of stronger-than-quantum correlations, which challenges correlations-based approaches to characterizing quantum theory and hints at potential beyond-quantum physics." The authors will collect the award and give a talk about the awarded work, followed by drinks and a small buffet. Researchers from all fields of physics and physics students are encouraged to attend!



Almost quantum correlations


Bell’s theorem teaches us that two or more parties conducting space-like

separated quantum experiments can generate correlations which do not

admit any classical interpretation. Such correlations are termed

non-local. Since the dimension of the local Hilbert spaces held by each

party is, in principle, unbounded, characterizing the set of non-local

quantum correlations is an arduous task. In this regard, there have been

a number of attempts to derive the shape of the set of quantum non-local

correlations from physical principles alone. Such principles are

understood to be device-independent, i.e., falsifiable via Bell-type



In this talk, I will argue against this research program. I will do so

by introducing the almost quantum set, a set of multipartite

correlations that has appeared under different names in fields as

diverse as graph theory, quantum gravity and quantum information

science. The almost quantum set contains stronger-than-quantum

correlations, yet it is shown to satisfy all device-independent axioms

proposed in the past to characterize the quantum set. This is so with

the possible exception of the principle of information causality, with

which, according to all existing numerical evidence, the almost quantum

set also complies. The almost quantum set hence represents a severe

obstruction to any hypothetical reconstruction of quantum theory via

device-independent principles. On the positive side, I will argue that,

for the almost quantum set to describe the correlation statistics of a

consistent physical theory, the latter should possess very perturbing


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Chiara Cardelli