Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2010-04-21
Physics
High Energy Physics
High Energy Physics - Theory
20 pages
Scientific paper
Based on well-known properties of semi-classical black holes, we show that weakly-coupled string theory can be viewed as a theory of N = 1/g_s^2 particle species. This statement is a string theoretic realization of the fact that the fundamental scale in any consistent D-dimensional theory of gravity is not the Planck length l_D, but rather the species scale L_N = N^1/(D-2) l_D. Using this fact, we derive the bound on semi-classical black hole entropy in any consistent theory of gravity as S > N, which when applied to string theory provides additional evidence for the former relation. This counting also shows that the Bekenstein-Hawking entropy can be viewed as the entanglement entropy, without encountering any puzzle of species. We demonstrate that the counting of species extends to the M-theory limit. The role of the species scale is now played by the eleven-dimensional Planck length, beyond which resolution of distances is gravitationally-impossible. The conclusion is, that string theory is a theory of species and gets replaced by a pure gravitational theory in the limit when species become strongly coupled and decouple.
Dvali Gia
Gómez César
No associations
LandOfFree
Species and Strings does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Species and Strings, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Species and Strings will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-327448