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- Publications
- Influence
Semiclassics, Goldstone bosons and CFT data
- A. Monin, David Pirtskhalava, R. Rattazzi, Fiona K. Seibold
- Physics
- 9 November 2016
A bstractHellerman et al. (arXiv:1505.01537) have shown that in a generic CFT the spectrum of operators carrying a large U(1) charge can be analyzed semiclassically in an expansion in inverse powers… Expand
Stability of Geodesically Complete Cosmologies
- P. Creminelli, David Pirtskhalava, Luca Santoni, E. Trincherini
- Physics
- 13 October 2016
We study the stability of spatially flat FRW solutions which are geodesically complete, i.e. for which one can follow null (graviton) geodesics both in the past and in the future without ever… Expand
Potential for general relativity and its geometry
- G. Gabadadze, Kurt Hinterbichler, David Pirtskhalava, Yanwen Shang
- Physics
- 8 July 2013
The unique ghost-free mass and nonlinear potential terms for general relativity are presented in a dieomorphism
Dynamics of Unitarization by Classicalization
- G. Dvali, David Pirtskhalava
- Physics
- 30 October 2010
Abstract We study dynamics of the classicalization phenomenon suggested in G. Dvali et al. [1] , according to which a class of non-renormalizable theories self-unitarizes at very high-energies via… Expand
Cosmic acceleration and the helicity-0 graviton
- C. D. Rham, G. Gabadadze, Lavinia Heisenberg, David Pirtskhalava
- Physics
- 8 October 2010
We explore cosmology in the decoupling limit of a nonlinear covariant extension of Fierz-Pauli massive gravity obtained recently in arXiv:1007.0443. In this limit the theory is a scalar-tensor model… Expand
Quasidilaton: Theory and cosmology
- G. D'Amico, G. Gabadadze, L. Hui, David Pirtskhalava
- Physics
- 19 June 2012
General Relativity (GR), with or without matter fields, admits a natural extension to a scale invariant theory that requires a dilaton. Here we show that the recently formulated massive GR, minimally… Expand
Covariant Master Theory for Novel Galilean Invariant Models and Massive Gravity
- G. Gabadadze, Kurt Hinterbichler, J. Khoury, David Pirtskhalava, M. Trodden
- Physics
- 28 August 2012
Coupling the galileons to a curved background has been a tradeoff between maintaining second order equations of motion, maintaining the galilean shift symmetries, and allowing the background metric… Expand
Weakly broken galileon symmetry
- David Pirtskhalava, Luca Santoni, E. Trincherini, F. Vernizzi
- Physics
- 30 April 2015
Effective theories of a scalar ϕ invariant under the internal galileon symmetryϕ→ϕ+b{sub μ}x{sup μ} have been extensively studied due to their special theoretical and phenomenological properties. In… Expand
Nonlinear dynamics of 3D massive gravity
- C. D. Rham, G. Gabadadze, David Pirtskhalava, A. Tolley, I. Yavin
- Physics
- 7 March 2011
We explore the nonlinear classical dynamics of the three-dimensional theory of “New Massive Gravity” proposed by Bergshoeff, Hohm and Townsend. We find that the theory passes remarkably highly… Expand
Nonrenormalization and naturalness in a class of scalar-tensor theories
- C. D. Rham, G. Gabadadze, Lavinia Heisenberg, David Pirtskhalava
- Physics
- 17 December 2012
We study the renormalization of some dimension-4, 7 and 10 operators in a class of nonlinear scalar-tensor theories. These theories are invariant under: (a) linear diffeomorphisms which represent an… Expand