How to Distinguish Dark Energy and Modified Gravity?

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dc.creatorWei, Hao
dc.creatorZhang, Shuang Nan
dc.date2008-03-24
dc.date2008-07-10
dc.date.accessioned2026-07-07T11:33:18Z
dc.date.available2026-07-07T11:33:18Z
dc.descriptionThe current accelerated expansion of our universe could be due to an unknown energy component (dark energy) or a modification to general relativity (modified gravity). In the literature, it has been proposed that combining the probes of the cosmic expansion history and growth history can distinguish between dark energy and modified gravity. In this work, without invoking non-trivial dark energy clustering, we show that the possible interaction between dark energy and dark matter could make the interacting dark energy model and the modified gravity model indistinguishable. An explicit example is also given. Therefore, it is required to seek some complementary probes beyond the ones of cosmic expansion history and growth history.
dc.description10 pages, 2 figures, revtex4; v2: accepted for publication in Phys. Rev. D; v3: typos corrected; v4: published version
dc.identifierhttps://arxiv.org/abs/0803.3292
dc.identifierhttp://arxiv.org/abs/0803.3292
dc.identifierPhys.Rev.D78:023011,2008
dc.identifierdoi:10.1103/PhysRevD.78.023011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197847
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleHow to Distinguish Dark Energy and Modified Gravity?
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