TED Conversations

Sean Carroll

theoretical physicist,


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LIVE TED Conversation: Join TED Speaker Sean Carroll

LIVE conversation with cosmologist Sean Carroll, TEDxCaltech Speaker and author of From Eternity to Here: The Quest for the Ultimate Theory of Time.

The conversation will open at 4pm (Eastern Standard Time), May 19, 2011. Sean is on vacation in Las Vagas, and will join us from his hotel room there to discuss the cosmos, the nature of time, and the science of poker.


Closing Statement from Sean Carroll

Thanks for participating, everyone! I hope some light was shed. It's been a pleasure chatting with the TED community.

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    May 19 2011: How well considered is the many-worlds interpretation by academics?
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      May 19 2011: I think it's the favorite possibility among most cosmologists and QM experts. But we admit that there are unanswered questions, such as the role of probabilities.
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        May 19 2011: Do more lean towards a discrete set of universes or a continuum of universes?
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        May 19 2011: In your view does the MWI remove the "need" for randomness as was traditionally formulated in quantum mechanics?
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          May 19 2011: I think it changes it, without completely solving the problem. In MWI, the wave function of the universe evolves in a completely deterministic and reversible way. But "where we are" in the wave function seems to necessarily require a random component. Observations are irreducibly random, as far as we can tell.
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        May 19 2011: Thanks. Impressive job answering so many questions in such a short time.

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