منابع مشابه
Gravity from a Modified Commutator
We show that a suitably chosen position-momentum commutator can elegantly describe many features of gravity, including the IR/UV correspondence and dimensional reduction (‘holography’). Using the most simplistic example based on dimensional analysis of black holes, we construct a commutator which qualitatively exhibits these novel properties of gravity. Dimensional reduction occurs because the ...
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The method and probability of distinguishing between the Λ cold dark matter (ΛCDM) model and modified gravity are studied from future observations for the growth rate of cosmic structure (Euclid redshift survey). We compare the mock observational data to the theoretical cosmic growth rate by modified gravity models, including the extended Dvali–Gabadadze–Porrati (DGP) model, kinetic gravity bra...
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R. Ali Vanderveld, Robert R. Caldwell, and Jason Rhodes Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA California Institute of Technology, 1200 East California Boulevard, Pasadena, California 91125, USA Kavli Institute for Cosmological Physics, Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA Department of Physics and As...
متن کاملDistinguishing Dark Matter from Modified Gravity
Dynamical mass discrepancies in galaxies have two possible explanations: the existence of large amounts of dark matter or the breakdown of Newtonian gravity. True dark matter halos of galaxies could differ in several respects from apparent halos inferred from misinterpreted modified gravity, and we discuss two observational tests to probe these differences. Modified gravity gives generic, geome...
متن کاملNonderivative modified gravity: a classification
We analyze the theories of gravity modified by a generic nonderivative potential built from the metric, under the minimal requirement of unbroken spatial rotations. Using the canonical analysis, we classify the potentials V according to the number of degrees of freedom (DoF) that propagate at the nonperturbative level. We then compare the nonperturbative results with the perturbative DoF propag...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics D
سال: 2005
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271805007814