On Causal Explanations of Quantum Correlations

58:29
 
Share
 

This series is archived ("Inactive feed" status)

Please note series archiving is a new, experimental, feature of Player FM with the aim of helping users understand how we fetch series and report on any issues.

When? This feed was archived on June 25, 2018 02:53 (9M ago). Last successful fetch was on April 13, 2018 01:55 (11M ago)

Why? Inactive feed status. Our servers were unable to retrieve a valid podcast feed for a sustained period.

What now? You might be able to find a more up-to-date version using the search function. This series will no longer be checked for updates. If you believe this to be in error, please check if the publisher's feed link below is valid and contact support to request the feed be restored or if you have any other concerns about this.

Manage episode 199949009 series 91393
By Discovered by Player FM and our community — copyright is owned by the publisher, not Player FM, and audio streamed directly from their servers.
Conference on the Foundations of Physics, Robert Spekkens (Perimeter Institute) gives a talk at the 17th UK and European Meeting on the Foundations of Physics (29-31 July, 2013) titled "On Causal Explanations of Quantum Correlations". Abstract: If correlation does not imply causation, then what does? Causal discovery algorithms take as their input facts about correlations among a set of observed variables, and they return as their output causal structures that can account for the correlations. We show that any causal explanation of Bell-inequality-violating correlations must contradict a core principle of these algorithms, namely, that an observed statistical independence between variables should not be explained by fine-tuning of the causal parameters. The fine-tuning criticism applies to all of the standard attempts at causal explanations of Bell correlations, such as superluminal causal influences, superdeterminism, and retrocausal influences that do not introduce causal cycles. This suggests a novel perspective on the assumptions underlying Bell's theorem: the nebulous assumption of realism can be replaced with the principle that all correlations ought to be explained causally and Bell's notion of locality can be replaced with the assumption of no fine-tuning. Finally, we discuss the possibility of salvaging a causal explanation of quantum correlations by casting quantum theory as an innovation to the theory of Bayesian inference.

130 episodes available. A new episode about every 33 days averaging 46 mins duration .