PIRSA:C08023 - The Clock and the Quantum: Time and Quantum Foundations - 2008PODCAST Subscribe to podcast

The Clock and the Quantum: Time and Quantum Foundations

Organizer(s): Lucien Hardy   Ward Struyve   Chris Fuchs   Guido Bacciagaluppi  

Collection URL: http://pirsa.org/C08023

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PIRSA:08090075  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Quantum reference frames and relationalism in quantum theory
Speaker(s): Stephen Bartlett
Abstract: A reference frame can be treated as a physical quantum object internal to the theory. Quantum reference frames whose size, and therefore accuracy, are bounded in some way necessarily limit one's ability to prepare states and to perform quantum operations and measurements on a system. The nature of t... read more
Date: 29/09/2008 - 4:00 pm

PIRSA:08090076  ( MP4 Medium Res , MP3 , PDF ) Which Format?
From Information Geometry to Quantum Theory
Speaker(s): Philip Goyal
Abstract: The unparalleled empirical success of quantum theory strongly suggests that it accurately captures fundamental aspects of the workings of the physical world. The clear articulation of these aspects is of inestimable value --- not only for the deeper understanding of quantum theory in itself, but for... read more
Date: 29/09/2008 - 4:30 pm

PIRSA:08090077  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Origin of the anthropocentric flow of time?
Speaker(s): Joan Vaccaro
Abstract: The underlying motivation for rejecting Everett's many-worlds interpretation of quantum mechanics and instead exploring single-world interpretations is to make physical theory concordant with human experience. From this perspective, the wave function collapse and Bohm-de Broglie interpretations are ... read more
Date: 29/09/2008 - 5:00 pm

PIRSA:08090078  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Clocks at the Big Bang? Quantum gravity is not what you think!
Speaker(s): Roger Penrose
Abstract: It has been a common viewpoint that the process of quantization ought to replace the singularities of classical general relativity by some chaotic-looking structure at the scale of the Planck length. In this talk I shall argue that whereas this is to be expected at black-hole singularities, Nature's... read more
Date: 30/09/2008 - 9:00 am

PIRSA:08090079  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Relativistic Quantum State Evolution: Narratability and Relativity
Speaker(s): Wayne Myrvold
Abstract: In this talk I will discuss a feature of quantum state evolution in a relativistic spacetime, the feature that David Albert has recently dubbed 'non-narratability.' This is: a complete state history given along one foliation does not always, by itself (that is, without specification of the dynamics ... read more
Date: 30/09/2008 - 10:00 am

PIRSA:08090080  ( MP4 Medium Res , MP3 , PDF ) Which Format?
On the time-energy uncertainty relation
Speaker(s): Jos Uffink
Abstract: In contrast to Heisenberg's position-momentum uncertainty relation, the status of the time-energy uncertainty relation has always remained dubious, For example, it is often said that 'time' in quantum theory is not an observable and not represented by a self-adjoint operator. I will review the backg... read more
Date: 30/09/2008 - 11:45 am

PIRSA:08090081  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Does a Computer have an Arrow of Time?
Speaker(s): Owen Maroney
Abstract: It has sometimes - though usually informally - been suggested that the psychological arrow can be reduced to the thermodynamic arrow through information processing properties of the brain. In this talk we demonstrate that this particular suggestion cannot succeed, as, insofar as information processi... read more
Date: 30/09/2008 - 2:00 pm

PIRSA:08090082  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The three - slit experiment
Speaker(s): Urbasi Sinha
Abstract: In reference [1] R. D. Sorkin investigated a formulation of quantum mechanics as a generalized measure theory. Quantum mechanics computes probabilities from the absolute squares of complex amplitudes, and the resulting interference violates the (Kolmogorov) sum rule expressing the additivity of prob... read more
Date: 30/09/2008 - 2:30 pm

PIRSA:08090083  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Time-Energy Uncertainty and short-time Nonequilirium Thermodynamics
Speaker(s): Noam Erez
Abstract: As is well known, time-energy uncertainty generically manifests itself in the short time behavior of a system weakly coupled to a bath, in the energy non-conservation of the interaction term (H_I does not commute with H_0). Similarly, the monotonic evolution of the system density operator to its equ... read more
Date: 30/09/2008 - 3:00 pm

PIRSA:08090085  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Chance and Romance: a marriage of classical and quantum probability
Speaker(s): Jenann Ismael
Abstract: I'll sketch of a proposal for unifying classical and quantum probability, arguing first for the need to recognize a measure over phase space as a component of classical theories (indeed, of any theory satisfying certain constraints and capable of generating predictions for open systems) and then sho... read more
Date: 30/09/2008 - 4:00 pm

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