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64 papers · 1 filter
A way to constrain a graviton mass from astronomical observations
Alexander F. Zakharov, Predrag Jovanovic, Dusko Borka +1
Along with a whole range of alternative theories of gravity, variants of the massive theory of gravity, i.e. the theory of gravity, in which the graviton has mass, have been active…
Local symmetries and physical degrees of freedom in gravity: a Dirac Hamiltonian constraint analysis
Milutin Blagojević, James M. Nester
In the literature on gravity, the status of local Lorentz invariance and the number of physical degrees of freedom have been controversial issues. Relying on a detailed Hami…
Construction and examples of higher gauge theories
Tijana Radenkovic, Marko Vojinovic
We provide several examples of higher gauge theories, constructed as generalizations of a BF model to 2BF and 3BF models with constraints. Using the framework of higher category th…
Entropy in general relativity: Kerr-AdS black hole
Milutin Blagojević, Branislav Cvetković
A general Hamiltonian approach to black hole thermodynamics is used to study entropy and conserved charges for Kerr-AdS solutions in general relativity. These thermodynamic variabl…
Velocity memory effect without soft particles
Branislav Cvetković, Dejan Simić
We study the behavior of geodesics in the plane-fronted wave background of the three-dimensional (3D) gravity with propagating torsion, which possesses only massive degrees of free…
AEDGE: Atomic Experiment for Dark Matter and Gravity Exploration in Space
Yousef Abou El-Neaj, Cristiano Alpigiani, Sana Amairi-Pyka +129
We propose in this White Paper a concept for a space experiment using cold atoms to search for ultra-light dark matter, and to detect gravitational waves in the frequency range bet…