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Ande-Sitter Spacetime

  1. May 17, 2004 #1
    From what I have gathered from another thread, the Ande-Sitter Spacetime incorperates a negative cosmological constant. Then the universe would constantly be contracting. I am sure I am missing something here. Does the Ande-Siter spacetime incorperate a static universe as well?
  2. jcsd
  3. May 17, 2004 #2
    One can say a lot, for instance if the Universe is constantly Contracting, then it would have a no-boundery(because the boundery would forever be expanding away).

    But here is Ed Witten's thoughts link:http://online.itp.ucsb.edu/online/strings98/witten/oh/04.html

    I believe this is an original paper of above:http://www.worldscinet.com/ijmpa/16/1616/S0217751X01004451.html
  4. May 18, 2004 #3
    I never heard of Ande-Sitter Spacetime. I guess you mean anti-de Sitter spacetime (AdS). :wink: .
    It is an empty universe with negative cosmological constant.
    AdS spaces are the most symmetric solutions of the Einstein equations (with lambda<0).
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