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Undecidability, Uncomputability, and Unpredictability Essay Contest
December 24, 2019 - April 24, 2020
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What Is “Fundamental”
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How Should Humanity Steer the Future?
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It From Bit or Bit From It
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What's Ultimately Possible in Physics?
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The Nature of Time
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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
September 17, 2021

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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