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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:C11006 - Conceptual Foundations and Foils for Quantum Information Processing - 2011PODCAST Subscribe to podcast

Conceptual Foundations and Foils for Quantum Information Processing

Organizer(s): Giulio Chiribella   Robert Spekkens   Anne Broadbent  

Collection URL: http://pirsa.org/C11006


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PIRSA:11050055  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Some Negative Remarks on Operational Approaches to Quantum Theory
Speaker(s): Chris Fuchs
Abstract: Over the last 10 years there has been an explosion of “operational reconstructions” of quantum theory. This is great stuff: For, through it, we come to see the myriad ways in which the quantum formalism can... read more
Date: 10/05/2011 - 2:00 pm

PIRSA:11050039  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Quantum correlations with no causal order
Speaker(s): Časlav Brukner
Abstract: Much of the recent progress in understanding quantum theory has been achieved within an operational approach. Within this context quantum mechanics is viewed as a theory for making probabilistic predictions for measurement outcomes following specified preparations. However, thus far some of the esse... read more
Date: 10/05/2011 - 2:50 pm

PIRSA:11050053  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Randomness amplification
Speaker(s): Roger Colbeck
Abstract: I will discuss what we know about creating randomness within physics. Although quantum theory prescribes completely random outcomes to particular processes, could it be that within a yet-to-be-discovered post-quantum theory these outcomes are predictable? We have recently shown that this is not poss... read more
Date: 10/05/2011 - 4:10 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
Tech Note: MIssed when he went to the board at one point

PIRSA:10050097  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Dynamical quantum nonlocality
Speaker(s): Sandu Popescu
Abstract: In my talk I raise the question of the fundamental limits to the size of thermal machines - refrigerators, heat pumps and work producing engines - and I will present the smallest possible ones. I will also discuss the issue of a possible complementarity between size and efficiency and show that even... read more
Date: 11/05/2011 - 9:30 am

PIRSA:11050031  ( MP4 Medium Res , MP3 , PDF ) Which Format?
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Speaker(s): Valerio Scarani
Abstract: Three-partite quantum systems exhibit interesting features that are absent in bipartite ones. Several instances are classics by now: the GHZ argument, the W state, the UPB bound entangled states, Svetlichny inequalities... In this talk, I shall discuss some on-going research projects that we are pur... read more
Date: 11/05/2011 - 10:50 am

PIRSA:11050036  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Non-contextual correlations in probabilistic models
Speaker(s): Andreas Winter
Abstract: Non-contextuality is presented as an abstraction and at the same time generalisation of locality. Rather than in correlations, the underlying physical model leaves its signature in collections of expectation values, which are contrained by inequalities much like Bell's or Tsirelson's inequalities. T... read more
Date: 11/05/2011 - 11:40 am

PIRSA:11050028  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Is the universe exponentially complicated? A no-go theorem for hidden variable interpretations of quantum theory.
Speaker(s): Jonathan Barrett
Abstract: The quantum mechanical state vector is a complicated object. In particular, the amount of data that must be given in order to specify the state vector (even approximately) increases exponentially with the number of quantum systems. Does this mean that the universe is, in some sense, exponentially co... read more
Date: 11/05/2011 - 2:00 pm
Series: Colloquium

PIRSA:11050052  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Quantum information, the ambiguity of the past, and the complexity of the present
Speaker(s): Charles Bennett
Abstract: Entanglement provides a coherent view of the physical origin of randomness and the growth and decay of correlations, even in macroscopic systems exhibiting few traditional quantum hallmarks. It helps explain why the future is more uncertain than the past, and how correlations can become macroscopic ... read more
Date: 12/05/2011 - 9:30 am

PIRSA:11050038  ( Flash Presentation , MP3 , PDF ) Which Format?
How Fundamental is the Uncertainty Principle?
Speaker(s): Renato Renner
Abstract: According to quantum theory, it is impossible to prepare the state of a system such that the outcome of any projective measurement on the system can be predicted with certainty. This limitation of predictive power, which is known as the uncertainty principle, is one of the main distinguishing proper... read more
Date: 12/05/2011 - 10:50 am

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