
Calendar of Physics Talks Vienna
Reconstruction of Quantum Theory: Bits, Locality, Continuity 
Speaker:  Borivoje Dakic (Uni Wien) 
Abstract:  Quantum theory makes the most accurate empirical predictions and yet it lacks simple, more easily comprehensible physical principles from which the theory can be derived uniquely. A broad class of probabilistic theories exist which all share features with quantum theory, such as probabilistic predictions for individual outcomes (indeterminism), impossibility of information transfer faster than the light velocity (nosignaling) or impossibility of copying of unknown states (nocloning). A vast majority of attempts to find physical principles behind quantum theory fall short of singling out quantum theory uniquely or are based on abstract mathematical assumptions that call themselves for a more compelling physical motivation. Here, we reconstruct quantum theory from three reasonable axioms: (1) (Information capacity) All systems of information carrying capacity of one bit have the same properties, (2) (Locality) The state of a composite system is completely determined by measurements on subsystems, (3) (Continuity) Between any two pure states (i.e. states for which there is a measurement with a definite outcome) there exists a continuous reversible transformation. We show that probability theories different than quantum theory cannot exhibit entanglement and thus nonclassical correlations that violate local realism unless that are in conflict with one or more axioms. Lunch Club
Overview

Date:  Tue, 27.10.2009 
Time:  12:30 
Duration:  60 min 
Location:  University of Vienna, Boltzmanngasse 5, 5th Floor, Large Seminar Room 
Contact:  Max Attems, David Burke, Marcus Huber, Theo Adaktylos 
LiseMeitnerLecture: Symmetries  Exact and Broken 
Speaker:  Cecilia Jarlskog (Lund University ) 
Abstract:  Öffentlicher Vortrag in englischer Sprache 
Date:  Wed, 28.10.2009 
Time:  18:00 
Location:  MariettaBlauSaal  Kleinen Festsaal der Universität Wien 
Contact:  ÖPG 
