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Quantum Gravity quote

A pessimist might say that combining string theory and loop quantum gravity is like combining epicycles and aether.

(John Baez, TWF281)

This entry was posted on October 24, 2009 at 7:50 am and is filed under Quantum Gravity . You can follow any responses to this entry through the RSS 2.0 feed You can leave a response, or trackback from your own site.

4 Responses to “Quantum Gravity quote”

  1. Nivra Says:
    October 24, 2009 at 10:16 am

    Realist , not pessimist. But I like the analogy.

    Reply
  2. Plato Says:
    October 24, 2009 at 5:13 pm

    Foundational perspectives is all? Link on name as to a collection of quantum gravity links.

    What is Quantum Gravity

    Finally, string theory started out as a generalization of quantum field theory where instead of point particles, string-like objects propagate in a fixed spacetime background. Although string theory had its origins in the study of quark confinement and not of quantum gravity, it was soon discovered that the string spectrum contains the graviton, and that “condensation” of certain vibration modes of strings is equivalent to a modification of the original background.

    LQG does not have this feature to describe point particles, where a one dimensional string includes gravity.

    Best,

    Reply
  3. Fikrewolde Says:
    November 7, 2009 at 10:47 am

    Hi there,
    How do you do? This is Fikrewolde from one of the universities in Ethiopia. I was impressed by the posts about Dr.Perelman in Perfect Rigour. But the thing is I haven’t read it yet and may not be able to read it within some days. I thought you would help me read it by sending me some of the interesting pages you have read in the book.

    Thanks in advance for reading it.
    Please try to contact me.

    Reply
  4. ccdantas Says:
    November 9, 2009 at 7:45 am

    Dear Fikrewolde,

    I’m sorry, but I have not read that book yet. Which posts do you refer? (From Woit’s blog, I suppose?)

    Best regards,
    Christine

    Reply

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