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- Centre National de la Recherche ScientifiqueFR283 papers
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9 papers · 2 filters
Phenomenology of curvature-induced quantum-gravity effects
Giovanni Amelino-Camelia, Giacomo Rosati, Suzana Bedić
Several studies have been devoted to the possibility that quantum gravity might tangibly affect relativistic kinematics for particles propagating from distant astrophysical sources…
Oscillations of hypermassive compact stars with gravitational radiation and viscosity
Peter B. Rau, Armen Sedrakian
Binary neutron star mergers, such as the multimessenger GW170817 event, may produce hypermassive compact objects which are supported against collapse by the internal circulation of…
State-dependent graviton noise in the equation of geodesic deviation
Z. Haba
We consider an equation of the geodesic deviation appearing in the problem of gravitational wave detection in an environment of gravitons. We investigate a state-dependent graviton…
Dispersion Relations in -Noncommutative Cosmology
Paolo Aschieri, Andrzej Borowiec, Anna Pachoł
We study noncommutative deformations of the wave equation in curved backgrounds and discuss the modification of the dispersion relations due to noncommutativity combined with curva…
Semi-classical Einstein equations:descend to the ground state
Zbigniew Haba
The time-dependent cosmological term arises from the energy-momentum tensor calculated in a state different from the ground state. We discuss the expectation value of the energy-mo…
Equivalence of inflationary models between the metric and Palatini formulation of scalar-tensor theories
Laur Järv, Alexandros Karam, Aleksander Kozak +3
With a scalar field non-minimally coupled to curvature, the underlying geometry and variational principle of gravity - metric or Palatini - becomes important and makes a difference…