Cold dark matter with MOND scaling

Ho, Chiu Man; Minić, Djordje; Ng, Y. Jack

doi:10.1016/j.physletb.2010.09.008

Cited by 83 publications

(128 citation statements)

References 25 publications

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“…Perhaps superficially our approach is similar in spirit to some earlier works [62][63][64][65][66] on the relationship between dark matter and the thermodynamics of spacetime. But the details of our derivations and especially the conceptual argumentation differs significantly from these papers.…”

Section: Particle Dark Matter Versus Emergent Gravitymentioning

confidence: 75%

Emergent Gravity and the Dark Universe

2017

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To MariaRecent theoretical progress indicates that spacetime and gravity emerge together from the entanglement structure of an underlying microscopic theory. These ideas are best understood in Anti-de Sitter space, where they rely on the area law for entanglement entropy. The extension to de Sitter space requires taking into account the entropy and temperature associated with the cosmological horizon. Using insights from string theory, black hole physics and quantum information theory we argue that the positive dark energy leads to a thermal volume law contribution to the entropy that overtakes the area law precisely at the cosmological horizon. Due to the competition between area and volume law entanglement the microscopic de Sitter states do not thermalise at sub-Hubble scales: they exhibit memory effects in the form of an entropy displacement caused by matter. The emergent laws of gravity contain an additional 'dark' gravitational force describing the 'elastic' response due to the entropy displacement. We derive an estimate of the strength of this extra force in terms of the baryonic mass, Newton's constant and the Hubble acceleration scale a 0 = cH 0 , and provide evidence for the fact that this additional 'dark gravity force' explains the observed phenomena in galaxies and clusters currently attributed to dark matter.

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Section: Particle Dark Matter Versus Emergent Gravitymentioning

confidence: 75%

Emergent Gravity and the Dark Universe

2017

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“…But we can also write F in another, yet equivalent, form: F entropic = mG(M + M ′ )/r 2 . These two forms of F illustrate the idea of CDM-MOND duality [8]. The first form can be interpreted to mean that there is no dark matter, but that the law of gravity is modified, while the second form means that there is dark matter (which, by construction, is consistent with MOND) but that the law of gravity is not modified.…”

Section: Mondian Dark Mattermentioning

confidence: 86%

“…This essay describes our effort in that endeavor. Succinctly, by making use of a novel quantum gravitational interpretation of (dark) matter's inertia our scheme [8] indicates that dark matter emulates MOND at the galactic scale. This work embraces a recurring theme at the current gravity research frontiers: the relationship between gravity and thermodynamics.…”

Section: Introductionmentioning

confidence: 95%

“…Therefore, we call it "MONDian dark matter" [8]. One can solve for M ′ as a 4 We only need to replace the T in Verlinde's argument byT for the Unruh temperature.…”

Section: Mondian Dark Mattermentioning

confidence: 99%

“…This suggests that we will need a generalization [8] of Verlinde's proposal [9] to de Sitter space with a positive cosmological constant (which, we recall, is related to the Hubble parameter H by Λ ∼ 3H…”

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confidence: 99%

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