Introducing the Dirac-Milne universe

Benoit-Lévy, A.; Chardin, G.

doi:10.1051/0004-6361/201016103

Cited by 105 publications

(119 citation statements)

References 73 publications

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“…Interspersed, mutually repulsive matter and antimatter clusters counteract the gravitational deceleration of the universe's expansion, leading to a constant rate of recession [7]. Although differing from the usual, accelerating universe, interpretation, this is statistically consistent with the supernova data.…”

Section: Cosmic Accelerationsupporting

confidence: 79%

“…Self-gravitating but mutually repulsive clusters of matter and antimatter form randomly interspersed matter and antimatter domains [7]. Thus there is no baryon asymmetry.…”

Section: Cosmic Baryon Asymmetrymentioning

confidence: 99%

“…At this rate the determination of the sign ofḡ could be accomplished with minimal (∼ 1 day) running time (once the beam and apparatus are installed, shaken down, and calibrated), or in proportionately longer running time with a beam of lower intensity. A first measurement will suffice to determine whether we live in a so-called "Dirac-Milne" universe (one in whichḡ = −g) [7]. More challenging and time-consuming measurements could detect whetherḡ/g = 1 ± , for ∼ 10 −2 or less.…”

Section: Sensitivitymentioning

confidence: 99%

“…Theories (see, e.g., [7]) in which antimatter repels matter (so-called "antigravity") offer simple explanations of a number of key cosmological puzzles: (1) the cosmic baryon asymmetry; (2) galactic EPJ Web of Conferences 05008-p. 4 rotation curves and the binding of galaxy clusters; (3) the apparent cosmic acceleration; and (4) the "horizon" and "flatness" problems. The solutions of each of these problems in the antigravity scenario are briefly summarized in the following subsections.…”

Section: Cosmological Considerationsmentioning

confidence: 99%

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Measuring antimatter gravity with muonium

Kaplan

Mancini

Phillips

et al. 2015

EPJ Web of Conferences

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Abstract.The gravitational acceleration of antimatter,ḡ, has never been directly measured and could bear importantly on our understanding of gravity, the possible existence of a fifth force, and the nature and early history of the universe. Only two avenues for such a measurement appear to be feasible: antihydrogen and muonium. The muonium measurement requires a novel, monoenergetic, low-velocity, horizontal muonium beam directed at an atom interferometer. The precision three-grating interferometer can be produced in silicon nitride or ultrananocrystalline diamond using state-of-the-art nanofabrication. The required precision alignment and calibration at the picometer level also appear to be feasible. With 100 nm grating pitch, a 10% measurement ofḡ can be made using some months of surface-muon beam time, and a 1% or better measurement with a correspondingly larger exposure. This could constitute the first gravitational measurement of leptonic matter, of 2nd-generation matter and, possibly, the first measurement of the gravitational acceleration of antimatter.

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Section: Cosmic Accelerationsupporting

confidence: 79%

“…Self-gravitating but mutually repulsive clusters of matter and antimatter form randomly interspersed matter and antimatter domains [7]. Thus there is no baryon asymmetry.…”

Section: Cosmic Baryon Asymmetrymentioning

confidence: 99%

Section: Sensitivitymentioning

confidence: 99%

Section: Cosmological Considerationsmentioning

confidence: 99%

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Measuring antimatter gravity with muonium

Kaplan

Mancini

Phillips

et al. 2015

EPJ Web of Conferences

View full text Add to dashboard Cite

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“…Thus we do not yet understand what makes up the majority of the observable universe. Alternative models include a repulsive interaction between matter and antimatter (Benoit-Lévy and Chardin 2012;Dopita 2012;Villata 2013;Hajdukovic 2011bHajdukovic , 2012bHajdukovic , 2014 and relic neutrino condensation (Fardon et al 2004;Hoon 2013). Despite these alternatives, the ΛCDM model is so far our most successful description of the late universe.…”

mentioning

confidence: 99%

Antineutrino Star Model of the Big Bang and Dark Energy

Neiser¹

2018

Preprint

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A new model of cosmology is proposed, where the state of high energy density commonly associated with the big bang is generated by the collapse of an antineutrino star that has exceeded its Chandrasekhar limit. To allow the first neutrino stars and antineutrino stars to form naturally from an initial quantum vacuum state, matter and antimatter are assumed to gravitationally repel. In this scenario, a degenerate antineutrino star in effective hydrostatic equilibrium has a density that is similar to the dark energy density of the ΛCDM model. When viewed from the core, such a star could today accelerate matter radially and emit the isothermal cosmic microwave background radiation, which addresses the horizon and flatness problems. This model and the ΛCDM model are in similar quantitative agreement with supernova distance measurements. The presented model is also in qualitative agreement with observed large-scale anisotropy and inhomogeneity, which distinguishes it from the ΛCDM model.

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The matter‐antimatter interpretation of Kerr spacetime

Villata

2015

Annalen der Physik

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-Repulsive gravity is not very popular in physics. However, one comes across it in at least two main occurrences in general relativity: in the negative-r region of Kerr spacetime, and as the result of the gravitational interaction between matter and antimatter, when the latter is assumed to be CPT-transformed matter. Here we show how these two independent developments of general relativity are perfectly consistent in predicting gravitational repulsion and how the above Kerr negative-r region can be interpreted as the habitat of antimatter. As a consequence, matter particles traveling along vortical geodesics can pass through the throat of a rotating black hole and emerge as antimatter particles (and vice versa). An experimental definitive answer on the gravitational behavior of antimatter is awaited in the next few years.Introduction. -Nearly 100 years ago, on the Russian front, Karl Schwarzschild found the first exact solutions to the Einstein field equations, a few weeks after the publication of the general theory of relativity (and a few months before dying). These solutions describe the geometry of empty spacetime around an uncharged, spherically-symmetric, and non-rotating body [1]. The generalization to a charged source was found soon after [2,3]. However, it took almost fifty years to discover the exact solutions for a rotating, axially-symmetric object, which were found by Kerr in 1963 [4]. As usual, the extension to the charged case, i.e. the Kerr-Newman solution, followed shortly thereafter [5]. Further contributions to the investigation of the Kerr metric came in several papers in the following years (e.g. [6][7][8][9][10][11]). In particular, efforts were spent to understand the complete topology of Kerr spacetime.A peculiar aspect of this topology, which was not present in the static Schwarzschild case and in its analytic extensions (e.g. [12][13][14][15]), is the existence of the negative-r region, i.e. the r coordinate is no longer conditioned by the usual restriction r ≥ 0, but is allowed to take also negative values, as a Cartesian coordinate. To a physicist this freedom may appear rather embarrassing, also because it is not easy to explain what sense may have this 'doubling' of space of which he had never felt the need before. Here we investigate the properties of this unknown region and seek to give a physical interpretation.

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Introducing the Dirac-Milne universe

Cited by 105 publications

References 73 publications

Measuring antimatter gravity with muonium

Measuring antimatter gravity with muonium

Antineutrino Star Model of the Big Bang and Dark Energy

The matter‐antimatter interpretation of Kerr spacetime

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