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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Howard Barnum


Composite systems and information processing
Speaker(s): Howard Barnum
Abstract:
Date: 10/05/2011 - 5:00 pm

Probabilities from Quantum States, or Quantum States from Probabilities?
Speaker(s): Howard Barnum
Abstract: I will consider various attempts to derive the quantum probabilities from the HIlbert space formalism within the many-worlds interpretation, and argue that they either fail, or depend on tacit probabilistic assumptions. The main problem with the project is that it is difficult to understand what the... read more
Date: 01/10/2009 - 2:30 pm

Jordan algebras and spectrality as tools for axiomatic characterization
Speaker(s): Howard Barnum
Abstract: TBA
Date: 15/08/2009 - 2:30 pm

Convex and Categorial Frameworks for Information Processing and Physics
Speaker(s): Howard Barnum
Abstract: TBA
Date: 05/06/2009 - 10:15 am

SICs, Convex Cones, and Algebraic Sets
Speaker(s): Howard Barnum
Abstract: The question whether SICs exist can be viewed as a question about the structure of the convex set of quantum measurements, or turned into one about quantum states, asserting that they must have a high degree of symmetry. I'll address Chris Fuchs' contrast of a 'probability first' view of the issue w... read more
Date: 29/10/2008 - 10:30 am

Information Processing in Convex Operational Theories: Toward a characterization of quantum mechanics
Speaker(s): Howard Barnum
Abstract: The rise of quantum information science has been paralleled by the development of a vigorous research program aimed at obtaining an informational characterization or reconstruction of the quantum formalism, in a broad framework for stochastic theories that encompasses quantum and classical theory, b... read more
Date: 15/10/2008 - 4:00 pm

Nonlocal no-signalling correlations that are locally quantum.
Speaker(s): Howard Barnum
Abstract:
Date: 20/07/2005 - 5:00 pm

Operational Quantum Logic
Speaker(s): Howard Barnum
Abstract: Introductory lecture summary: Operational Quantum Logic I: Effect Algebras, States, and Basic Convexity • Effect algebras, effect test-spaces, PAS's (partial abelian semigroups). • Morphisms, states, dynamics. Classes of effect algebras whose state-set has nice properties. • Operational ... read more
Date: 18/07/2005 - 3:30 pm

Operational Quantum Logic
Speaker(s): Howard Barnum
Abstract: Introductory lecture summary: Operational Quantum Logic I: Effect Algebras, States, and Basic Convexity • Effect algebras, effect test-spaces, PAS's (partial abelian semigroups). • Morphisms, states, dynamics. Classes of effect algebras whose state-set has nice properties. • Operational ... read more
Date: 17/07/2005 - 4:30 pm

Generalized entanglement and superselection rules
Speaker(s): Howard Barnum
Abstract: Qunatum Information Theory
Date: 14/07/2004 - 3:00 am
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