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Undecidability, Uncomputability, and Unpredictability Essay Contest
December 24, 2019 - March 16, 2020
Contest Partners: Fetzer Franklin Fund, and The Peter and Patricia Gruber Foundation
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What Is “Fundamental”
October 28, 2017 to January 22, 2018
Sponsored by the Fetzer Franklin Fund and The Peter & Patricia Gruber Foundation
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Wandering Towards a Goal
How can mindless mathematical laws give rise to aims and intention?
December 2, 2016 to March 3, 2017
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Trick or Truth: The Mysterious Connection Between Physics and Mathematics
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How Should Humanity Steer the Future?
January 9, 2014 - August 31, 2014
Contest Partners: Jaan Tallinn, The Peter and Patricia Gruber Foundation, The John Templeton Foundation, and Scientific American
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It From Bit or Bit From It
March 25 - June 28, 2013
Contest Partners: The Gruber Foundation, J. Templeton Foundation, and Scientific American
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Questioning the Foundations
Which of Our Basic Physical Assumptions Are Wrong?
May 24 - August 31, 2012
Contest Partners: The Peter and Patricia Gruber Foundation, SubMeta, and Scientific American
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Is Reality Digital or Analog?
November 2010 - February 2011
Contest Partners: The Peter and Patricia Gruber Foundation and Scientific American
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What's Ultimately Possible in Physics?
May - October 2009
Contest Partners: Astrid and Bruce McWilliams
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The Nature of Time
August - December 2008
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Saibal Mitra: on 12/1/08 at 16:44pm UTC, wrote I failed to correct two typo's. Eq. (7), the second term should be |No...

Saibal Mitra: on 12/1/08 at 11:18am UTC, wrote Essay Abstract Assuming the validity of the Many Worlds...


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FQXi FORUM
February 29, 2020

CATEGORY: The Nature of Time Essay Contest (2008) [back]
TOPIC: Can we change the past by forgetting? by Saibal Mitra [refresh]
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Saibal Mitra wrote on Dec. 1, 2008 @ 11:18 GMT
Essay Abstract

Assuming the validity of the Many Worlds Interpretation of quantum mechanics (MWI), we examine the possibility of changing the past by memory erasure. We find that while observers cannot change the probability of experiencing certain outcomes, they can nevertheless randomize past events and thus end up in a different sector of the multiverse. We also discuss Tegmark's quantum suicide thought experiment and show that, contrary to conventional wisdom, it {it cannot} be used by an observer to test the validity of the MWI for herself.

Author Bio

Saibal Mitra is currently working on his Ph.D. at the university of Amsterdam.

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Saibal Mitra wrote on Dec. 1, 2008 @ 16:44 GMT
I failed to correct two typo's.

Eq. (7), the second term should be |No comet)

Eq. (10), there |O_initial) should be |O_notified)

I did spot these errors, but when I compiled the file for the last time, I forgot to run pdflatex :(

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