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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:18040114  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Symmetric Informationally Complete Measurements Identify the Essential Difference between Classical and Quantum
Speaker(s): John DeBrota
Abstract: In this talk we describe a general procedure for associating a minimal informationally-complete quantum measurement (or MIC) with a probabilistic representation of quantum theory. Towards this, we make use of the idea that the Born Rule is a consistency criterion among subjectively assigned probabilities rather than a tool to set purely physically mandated probabilities. In our setting, the difference between quantum theory and classical statistical physics is the way their physical assumptions augment bare probability theory: Classical statistical physics corresponds to a trivial augmentation, while quantum theory makes crucial use of the Born Rule. We prove that the representation of the Born Rule obtained from a symmetric informationally-complete measurement (or SIC) minimizes the distinction between the two theories in at least two senses, one functional, the other geometric. Our results suggest that this representation supplies a natural vantage point from which to identify their essential differences, and, perhaps thereby, a set of physical postulates reflecting the quantum nature of the world.
Date: 10/04/2018 - 2:00 pm
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