PIRSA:C09016 - Reconstructing Quantum Theory - 2009PODCAST Subscribe to podcast

Reconstructing Quantum Theory

Organizer(s): Philip Goyal   Lucien Hardy  

Collection URL: http://pirsa.org/C09016

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Quantum Mechanics as a Theory of Systems with Limited Information Content
Speaker(s): Caslav Brukner
Abstract: I will consider physical theories which describe systems with limited information content. This limit is not due observer's ignorance about some “hidden” properties of the system - the view that would have to be confronted with Bell's theorem - but is of fundamental nature. I wil... read more
Date: 09/08/2009 - 11:00 am

The quantum logical reconstruction from Rovelli's axioms and its limits
Speaker(s): Alexei Grinbaum
Abstract: What belongs to quantum theory is no more than what is needed for its derivation. Keeping to this maxim, we record a paradigmatic shift in the foundations of quantum mechanics, where the focus has recently moved from interpreting to reconstructing quantum theory. We present a quantum logical derivat... read more
Date: 09/08/2009 - 2:30 pm

Quantum Theory from Entropic Inference
Speaker(s): Ariel Caticha
Abstract: Non-relativistic quantum theory is derived from information codified into an appropriate statistical model. The basic assumption is that there is an irreducible uncertainty in the location of particles so that the configuration space is a statistical manifold with a natural information metric. The d... read more
Date: 09/08/2009 - 4:30 pm

Exact uncertainty, quantum mechanics and beyond
Speaker(s): Michael Hall
Abstract: The fact that quantum mechanics admits exact uncertainty relations is used to motivate an ‘exact uncertainty’ approach to obtaining the Schrödinger equation. In this approach it is assumed that an ensemble of classical particles is subject to momentum fluctuations, with ... read more
Date: 10/08/2009 - 9:00 am

Exact uncertainty, bosonic fields, and interacting classical-quantum systems
Speaker(s): Marcel Reginatto
Abstract: The quantum equations for bosonic fields may be derived using an 'exact uncertainty' approach [1]. This method of quantization can be applied to fields with Hamiltonian functionals that are quadratic in the momentum density, such as the electromagnetic and gravitational fields. The approach, when ap... read more
Date: 10/08/2009 - 11:00 am

The power of epistemic restrictions in reconstructing quantum theory
Speaker(s): Robert Spekkens
Abstract: A significant part of quantum theory can be obtained from a single innovation relative to classical theories, namely, that there is a fundamental restriction on the sorts of statistical distributions over classical states that can be prepared.  (Such a restriction is termed “epistem... read more
Date: 10/08/2009 - 4:30 pm

Steps Towards a Unified Basis.
Speaker(s): Inge Helland
Abstract: A new foundation of quantum mechanics for systems symmetric under a compact symmetry group is proposed. This is given by a link to classical statistics and coupled to the concept of a statistical parameter. A vector phi of parameters is called an inaccessible c-variable if experiments can be provide... read more
Date: 11/08/2009 - 9:00 am

Why Quantum Theory is Complex
Speaker(s): Philip Goyal
Abstract: Complex numbers are an intrinsic part of the mathematical formalism of quantum theory, and are perhaps its most mysterious feature. We show that it is possible to derive the complex nature of the quantum formalism directly from the assumption that a pair of real numbers is associated to each sequenc... read more
Date: 11/08/2009 - 11:00 am

Quantum Mechanics as a Real-Vector-Space Theory with a Universal Auxiliary Rebit
Speaker(s): William Wootters
Abstract: In a 1960 paper, E. C. G. Stueckelberg showed how one can obtain the familiar complex-vector-space structure of quantum mechanics by starting with a real-vector-space theory and imposing a superselection rule. In this talk I interpret Stueckelberg’s construction in terms of a single auxili... read more
Date: 11/08/2009 - 2:30 pm

Reconstructing quantum theory from Brownian motion: an assessment
Speaker(s): Lee Smolin
Abstract: TBA
Date: 11/08/2009 - 4:30 pm

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