Thoughts on Quantum Cosmology?

  • #1
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Main Question or Discussion Point

I just finished reading a book called Three Roads to Quantum Gravity, and in it the author mentioned a few arguments surrounding quantum cosmology. He did not seem too fond of it, but to me (relatively inexperienced) combining the two makes a lot of sense. What are your thoughts on it?
 

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  • #2
mathman
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What are they (arguments)?
 
  • #3
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Argument was a poor word choice, he mentioned a few topics I should say. He mentions that you must abandon a few approaches to quantum mechanics and a few other minor things. It was a small part of the book but it was very interesting so I was more or less looking for opinions on quantum cosmology as a whole.
 
  • #4
Doug Huffman
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Three Roads to Quantum Gravity by Lee Smolin (Basic, 2001) Approaches discussed include String Theory, M-Theory and Loop Quantum Gravity, then Smolin's preferred route.

Since 2001 Smolin has written The Trouble With Physics and Time Reborn, and I believe advocates most strongly for a background-independent physics as in his new (December 2014) The Singular Universe and the Reality of Time: A Proposal in Natural Philosophy by Lee Smolin and Roberto Mangabeira Unger, Cambridge University Press.

In all honesty, I have abandoned my attempt to read 'Singular Universe' after reading and enjoying Smolin's latter section of the book but foundering on RMU's first portion. I believe that RMU dictated in academic Portuguese and the translated sentence structure is too foreign to convey the complicated hypothesis.
 
  • #5
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That is it!! Great book nevertheless.
 
  • #6
Doug Huffman
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Argument was a poor word choice, [ ... ]
Argument is a fine word. It properly means defense. It is vulgarly used as argumentative and quarrelsome.
 
  • #7
Chalnoth
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I just finished reading a book called Three Roads to Quantum Gravity, and in it the author mentioned a few arguments surrounding quantum cosmology. He did not seem too fond of it, but to me (relatively inexperienced) combining the two makes a lot of sense. What are your thoughts on it?
Quantum cosmology is more than just a combination of quantum mechanics and cosmology. Quantum cosmology is (usually) a very specific idea of using loop-quantum-gravity to estimate what would happen if we have a quantum bounce instead of a big bang singularity.

Loop quantum gravity is currently a fairly speculative attempt to reconcile quantum mechanics and gravity.
 

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