Concept
Aether theories
Publications associées (11)
Linearized supergravity with a dynamical preferred frame
We study supersymmetric extension of the Einstein-aether gravitational model where local Lorentz invariance is broken down to the subgroup of spatial rotations by a vacuum expectation value of a timelike vector field called aether. Embedding aether into a ...
SPRINGER2021Phonon-Ion Interactions: Designing Ion Mobility Based on Lattice Dynamics
This review is focused on the influence of lattice dynamics on the ionic mobility in superionic conductors in particular solid-state Li-ion conductors. After a succinct review of the static view of ionic conduction, the role of polarizability as the underl ...
WILEY-V C H VERLAG GMBH2020Einstein-Cartan gravity, matter, and scale-invariant generalization
Andrey Shkerin, Inar Timiryasov, Sebastian Zell
We study gravity coupled to scalar and fermion fields in the Einstein-Cartan framework. We discuss the most general form of the action that contains terms of mass dimension not bigger than four, leaving out only contributions quadratic in curvature. By res ...
SPRINGER2020Supergravity with broken Lorentz invariance: theory and phenomenological consequences
We construct and study supersymmetric extension of the Einstein-aether gravitational theory. Using superfield formalism we carry out unique linearized Lorentz violating supergravity action invariant under super-gauge transformations and obtain its bosonic ...
IOP PUBLISHING LTD2019Gauging nonrelativistic field theories using the coset construction
Alexander Monin, Georgios Karananas
We discuss how nonrelativistic spacetime symmetries can be gauged in the context of the coset construction. We consider theories invariant under the centrally extended Galilei algebra as well as the Lifshitz one, and we investigate under what conditions th ...
Amer Physical Soc2016Poincaré, Scale and Conformal Symmetries
Symmetries are omnipresent and play a fundamental role in the description of Nature. Thanks to them, we have at our disposal nontrivial selection rules that dictate how a theory should be constructed. This thesis, which is naturally divided into two parts, ...
EPFL2016UV-extending ghost inflation
Sergey Sibiryakov, Mikhail Ivanov
We present a setup that provides a partial UV-completion of the ghost inflation model up to a scale which can be almost as high as the Planck mass. This is achieved by coupling the inflaton to the Lorentz-violating sector described by the Einstein-aether t ...
Iop Publishing Ltd2014Horava gravity versus thermodynamics: The black hole case
Sergey Sibiryakov, Diego Blas Temino
Under broad assumptions, breaking of Lorentz invariance in gravitational theories leads to tension with unitarity because it allows for processes that apparently violate the second law of thermodynamics. The crucial ingredient of this argument is the exist ...
2011Scale-invariant alternatives to general relativity
We study the general class of gravitational field theories constructed on the basis of scale invariance (and therefore absence of any mass parameters) and invariance under transverse diffeomorphisms, which are the 4-volume conserving coordinate transformat ...
2011Scale-Invariant Models of Gravity and Particle Physics and their Cosmological Implications
Currently, the best theoretical description of fundamental matter and its gravitational interaction is given by the Standard Model (SM) of particle physics and Einstein's theory of General Relativity (GR). These theories contain a number of seemingly unrel ...
EPFL2011