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13 papers · 2 filters
Softly Massive Gravity
G. Gabadadze, M. Shifman
Large-distance modification of gravity may be the mechanism for solving the cosmological constant problem. A simple model of the large-distance modification -- four-dimensional (4D…
Graviton Mass or Cosmological Constant?
Gregory Gabadadze, Andrei Gruzinov
To describe a massive graviton in 4D Minkowski space-time one introduces a quadratic term in the Lagrangian. This term, however, can lead to a readjustment or instability of the ba…
Formation and evolution of cosmic D-strings
Gia Dvali, Alexander Vilenkin
We study the formation of D and F-cosmic strings in D-brane annihilation after brane inflation. We show that D-string formation by quantum de Sitter fluctuations is severely suppre…
Hidden sl(2,R) Symmetry in 2D CFTs and the Wave Function of 3D Quantum Gravity
F. Nitti, M. Porrati
We show that all two-dimensional conformal field theories possess a hidden sl(2,R) affine symmetry. More precisely, we add appropriate ghost fields to an arbitrary CFT, and we use…
Reply to ``Comment on `Properties of the massive Thirring model from the XYZ spin chain' "
M. Kolanovic, S. Pallua, P. Prester
We elaborate in more details why lattice calculation in [Kolanovic et al, Phys. Rev. D 62, 025021 (2000)] was done correctly and argue that incresing the number of sites is not exp…
Higgs Phenomenon for the Graviton in Ads Space
M. Porrati
In this review, we summarize recent findings that show how standard 4-d Einstein gravity coupled to a conformal field theory can become massive in Anti de Sitter Space. Key ingredi…