html5-img
1 / 9

C L O W N S & BLACK HOLES

C L O W N S & BLACK HOLES. The canonical conjugate to black hole entropy in general theories of gravity. Ram Brustein , Merav Hadad. Phys . Lett . B718 (2012) 653-656. Motivation. Black hole e ntropy counts the degrees of freedom of something unclear

ailish
Télécharger la présentation

C L O W N S & BLACK HOLES

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. CLOWNS & BLACK HOLES The canonical conjugate toblack hole entropy in general theories of gravity Ram Brustein, MeravHadad Phys. Lett. B718 (2012) 653-656 12/

  2. Motivation Black hole entropy counts the degrees of freedom of something unclear Investigate common characteristics of general theories of gravity Building blocks of quantum gravity. 12/

  3. Entropy of black holes in general theories of gravity Wald entropy: 12/

  4. Identifying the canonical conjugate of Wald entropy from the action Brown :gr-qc/9506085 Black hole: • radial direction • Time - second normal direction. • Integration over the surface area of the horizon 12/

  5. Geometric meaning : The opening angle at - plane 12/

  6. Quantum picture In the classical limit (specific heat ) Non zero uncertainty at the opening angle 12/

  7. Physical meaning Quantum black hole is expected to be super-position of metrics with conical singularities. 12/

  8. Example of quantum gravity - Strings • String theory identifies the “microstates “ of a (extremal) black hole as modes of different vibrations of the strings. (hep-th/9602043) • These vibrations create metrics with conical singularities at the horizon with (N integer ). (hep-th/0212210) In string theory the “microstates“ of the black hole are metrics with (quantized) conical singularities at the horizon. 12/

  9. Summary • In any theory of gravity the entropy of a black hole is canonical to the opening angle in • Prediction - a quantum black hole is a superposition of metrics with conical singularities. • The prediction fits quantum gravity of string theory. 12/

More Related