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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:C07025 - Many Worlds at 50 - 2007PODCAST Subscribe to podcast

MANY WORLDS AT 50

Organizer(s):   Adrian Kent   David Wallace  

Collection URL: http://pirsa.org/C07025


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The Everett interpretation
Speaker(s): Simon Saunders
Abstract: I shall present an overview of quantum mechanics in the Everett interpretation, that emphasises its structural characteristics, as a theory of what exists. In this respect it shares common ground with other fundamental theories in physics. As such its appeal is conservative; it makes do with the pur... read more
Date: 21/09/2007 - 10:00 am

Relative States and the Environment
Speaker(s): Wojciech Zurek
Abstract: Everett explained “collapse of the wavepacket” by noting that observer will perceive the state of the measured quantum system relative to the state of his own records. Two elements (missing in this simple and compelling explanation of effective collapse) are required to complete relative state int... read more
Date: 21/09/2007 - 11:40 am

Probability in the Everett interpretation: state of play
Speaker(s): David Wallace
Abstract: I will review the current state of the probability problem. My main focus will be on the attempts by David Deutsch and myself to provide a proof of the Born Rule starting from Everettian assumptions, but I will also attempt to locate these attempts within the more general framework of the probabilit... read more
Date: 21/09/2007 - 2:50 pm

Probability in the Everett Interpretation of Quantum Mechanics
Speaker(s): David Albert
Abstract: I will rehearse and try to sharpen some of the perennial worries about making sense of probabilities in Everettian interpretations of quantum mechanics, with particular attention to the recent Decision-Theoretic proposals of Deutsch and others
Date: 21/09/2007 - 4:30 pm

Subjective Probability and Many Worlds
Speaker(s): Ruediger Schack
Abstract: Probability is often regarded as a problem for the many-worlds interpretation: if all branches of the splitting wavefunction are equally real, what sense does it make to say that the branches have different probabilities? In the decision-theoretic approach due to Deutsch and Wallace, probabilities a... read more
Date: 22/09/2007 - 10:00 am

Which many world worries are uniquely quantum?
Speaker(s): Max Tegmark
Abstract: I analyze a series of common objections to Everett's Many Worlds Interpretation. I discuss which ones are unique to quantum mechanics, and which have nothing to do with quantum mechanics per se as they can also be debated in the context of other areas of physics
Date: 22/09/2007 - 11:40 am

Quasiclassical Realms and Copenhagen Quantum Theory in a Quantum Universe
Speaker(s): James Hartle
Abstract: One of the most remarkable features of our quantum universe is the wide range of time, place, scale, and epoch on which the deterministic laws of classical physics apply to an excellent approximation. This talk reviews the origin of such a quasiclassical realm in a universe governed fundamentally by... read more
Date: 22/09/2007 - 2:50 pm

Everett and Evolution
Speaker(s): Adrian Kent
Abstract: A fundamental question for Everettians is whether they can formulate a many-worlds interpretation of quantum theory which explains why, amongst all possible types of intelligent creature with all possible types of evolutionary and experimental history, we find ourselves among those whose histories a... read more
Date: 22/09/2007 - 4:30 pm

Everett Speaks
Speaker(s): Peter Byrne
Abstract: In 'Everett Speaks' I will detail Everett's involvement in operations research during the Cold War. He was, for many years, a major architect of the United States' nuclear war plan. I will talk about his family life and his personal decline. We will hear a portion of the only tape recording of Evere... read more
Date: 22/09/2007 - 5:40 pm

Probabilities and Choices in Many Worlds
Speaker(s): David Papineau
Abstract: Orthodox thinking about chance, choice and confirmation is a philosophical mess. Within the many-worlds metaphysics, where quantum chanciness engenders no uncertainty, these things come out at least as well, if not better.
Date: 23/09/2007 - 10:00 am

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