PIRSA Logo


PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

Displaying all lectures given by: Howard Barnum


PIRSA:16080024  ( MP4 Medium Res , MP3 , PDF ) Which Format?
TBA
Speaker(s): Howard Barnum
Abstract:
Date: 03/08/2016 - 2:00 pm

PIRSA:15050073  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Entropy, majorization, and thermodynamics in general probabilistic theories.
Speaker(s): Howard Barnum
Abstract: Much progress has recently been made on the fine-grained thermodynamics and statistical mechanics of microscopic physical systems, by conceiving of thermodynamics as a resource theory: one which governs which transitions between states are possible using specified "thermodynamic" (e.g. adiabatic or ... read more
Date: 11/05/2015 - 2:15 pm

PIRSA:13050081  ( MP4 Medium Res , MP4 Low Res , MP3 , PDF ) Which Format?
Generalizations of Quantum Theory
Abstract:
Date: 30/05/2013 - 3:30 pm

PIRSA:11050056  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Composite systems and information processing
Speaker(s): Howard Barnum
Abstract: The talk will focus primarily on recent work with Alexander Wilce in which we show that any locally tomographic composite of a qubit with any finite-dimensional homogeneous self-dual (equivalently Jordan-algebraic) system must be a standard finite-dimensional quantum (i.e. $C^*$-algebraic) system. &... read more
Date: 10/05/2011 - 5:00 pm

PIRSA:09100091  ( MP4 Medium Res , MP3 , PDF ) Which Format?
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

PIRSA:09080016  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Jordan algebras and spectrality as tools for axiomatic characterization
Speaker(s): Howard Barnum
Abstract: The normalized-state spaces of finite-dimensional Jordan algebras constitute a relatively narrow class of convex sets that includes the finite-dimensional quantum mechanical and classical state spaces. Several beautiful mathematical characterizations of Jordan statespaces exist, notably Koecher's ch... read more
Date: 15/08/2009 - 2:30 pm

PIRSA:09060028  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Convex and Categorial Frameworks for Information Processing and Physics
Speaker(s): Howard Barnum
Abstract: TBA
Date: 05/06/2009 - 10:15 am

PIRSA:08100074  ( MP4 Medium Res , MP3 , PDF ) Which Format?
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

PIRSA:08100037  ( MP4 Medium Res , MP3 , PDF ) Which Format?
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

PIRSA:05070109  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Nonlocal no-signalling correlations that are locally quantum.
Speaker(s): Howard Barnum
Abstract:
Date: 20/07/2005 - 5:00 pm

PIRSA:05070095  ( MP4 Medium Res , MP3 , PDF ) Which Format?
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

PIRSA:05070092  ( MP4 Medium Res , MP3 , PDF ) Which Format?
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

PIRSA:04070009  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Generalized entanglement and superselection rules
Speaker(s): Howard Barnum
Abstract: Qunatum Information Theory
Date: 14/07/2004 - 3:00 am
Valid XHTML 1.0!