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13 papers · 2 filters
Self-tuning and the derivation of the Fab Four
Christos Charmousis, Edmund J. Copeland, Antonio Padilla +1
We have recently proposed a special class of scalar tensor theories known as the Fab Four. These arose from attempts to analyse the cosmological constant problem within the context…
Kohn's theorem and Newton-Hooke symmetry for Hill's equations
P. M. Zhang, G. W. Gibbons, P. A. Horvathy
Hill's equations, which first arose in the study of the Earth-Moon-Sun system, admit the two-parameter centrally extended Newton-Hooke symmetry without rotations. This symmetry all…
Gauge invariance and non-constant gauge couplings
Noureddine Mohammedi
It is shown that space-time dependent gauge couplings do not completely break gauge invariance. We demonstrate this in various gauge theories.
Symmetries and currents of the ideal and unitary Fermi gases
Xavier Bekaert, Elisa Meunier, Sergej Moroz
The maximal algebra of symmetries of the free single-particle Schroedinger equation is determined and its relevance for the holographic duality in non-relativistic Fermi systems is…
Towards a gravity dual of the unitary Fermi gas
Xavier Bekaert, Elisa Meunier, Sergej Moroz
Inspired by the method of null dimensional reduction and by the holographic correspondence between Vasiliev's higher-spin gravity and the critical O(N) model, a bulk dual of the un…
Cosmological solutions with massive gravitons in the bigravity theory
Mikhail S. Volkov
We present solutions describing homogeneous and isotropic cosmologies in the massive gravity theory with two dynamical metrics recently proposed in arXiv:1109.3515 and claimed to b…