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Showing 2002 · hep-thShow all

54 papers · 2 filters

hep-th2002★ 119 cited

Comments on the Hydrogen Atom Spectrum in the Noncommutative Space

M. Chaichian, M. M. Sheikh-Jabbari, A. Tureanu

There has been disagreement in the literature on whether the hydrogen atom spectrum receives any tree-level correction due to noncommutativity. Here we shall clarify the issue and…

hep-th2002★ 22 cited

Brane Gas Cosmology, M-theory and Little String Theory

Stephon H. S. Alexander

We generalize the Brane Gas Cosmological Scenario to M-theory degrees of freedom, namely and branes. Without brane intersections, the Brandenberger Vafa(BV) arguments app…

hep-th2002★ 4 cited

Spacetime Quotients, Penrose Limits and Conformal Symmetry Restoration

Mohsen Alishahiha, Mohammad M. Sheikh-Jabbari, Radu Tatar

In this paper we study the Penrose limit of AdS_5 orbifolds. The orbifold can be either in the pure spatial directions or space and time directions. For the AdS_5/Γ\times S^5 spati…

hep-th2002★ 30 cited

Causal structures of pp-waves

Veronika E. Hubeny, Mukund Rangamani

We discuss the causal structure of pp-wave spacetimes using the ideal point construction outlined by Geroch, Kronheimer, and Penrose. This generalizes the recent work of Marolf and…

hep-th2002★ 187 cited

Geometric Model for Complex Non-Kaehler Manifolds with SU(3) Structure

Edward Goldstein, Sergey Prokushkin

For a given complex n-fold M we present an explicit construction of all complex (n+1)-folds which are principal holomorphic T2-fibrations over M. For physical applications we consi…

hep-th2002★ 282 cited

The Trouble with de Sitter Space

Naureen Goheer, Matthew Kleban, Leonard Susskind

In this paper we assume the de Sitter Space version of Black Hole Complementarity which states that a single causal patch of de Sitter space is described as an isolated finite temp…