Vacuum energy and the cosmological constant

Bass, Steven D.

doi:10.1142/s0217732315400337

Cited by 27 publications

(10 citation statements)

References 92 publications

(91 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Interestingly, the dark energy scale µ vac ∼ 0.002 eV is similar to the value that we expect for the light neutrino mass [7][8][9] taking the normal hierarchy of neutrino masses [10]. One observes the phenomenological relation [2,8]…”

Section: The Cosmological Constant and Particle Physicssupporting

confidence: 80%

“…Ideas connecting the cosmological constant and Higgs-mass hierarchy problem to new critical phenomena near the Planck scale are discussed in Refs. [2,8,12,18,21]. Perhaps the Standard Model is itself (in part) emergent as the long range tail of a critical system that exists close to the Planck scale and there is no new scale between the electroweak scale and some very high scale close to the Planck mass?…”

Section: The Cosmological Constant and Particle Physicsmentioning

confidence: 99%

“…The model equation of state looks like a vacuum energy term in Einstein's equations of General Relativity, proportional to the metric tensor g µν . Taking the scale of the Ising interaction J ∼ M close to the Planck mass and coupling the "neutrino" spins to gauge fields it is plausible that the gauge bosons which couple to the "neutrino" nonperturbatively acquire mass in the ground state [2,8]. That is, they are in a Higgs phase.…”

Section: The Cosmological Constant and Particle Physicsmentioning

confidence: 99%

“…The accelerating expansion of the Universe is interpreted within Einstein's theory of General Relativity as driven by a small positive cosmological constant or vacuum energy density perceived by gravitational interactions called dark energy, for reviews see Refs. [1,2]. Understanding this vacuum energy is an important challenge for theory and connects the Universe on cosmological scales (the very large) with quantum field theory and subatomic physics (the very small).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Cosmological Constant and Stability of the Higgs Vacuum

Bass¹

2016

Acta Phys. Pol. B

View full text Add to dashboard Cite

show abstract

Section: The Cosmological Constant and Particle Physicssupporting

confidence: 80%

Section: The Cosmological Constant and Particle Physicsmentioning

confidence: 99%

Section: The Cosmological Constant and Particle Physicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Cosmological Constant and Stability of the Higgs Vacuum

Bass¹

2016

Acta Phys. Pol. B

View full text Add to dashboard Cite

show abstract

“…• Some aspects of the tough cosmological constant problem and its connection with the notion of vacuum energy are addressed in the review contribution by Steven Bass [21]; in particular the possibility that the cosmological constant plus LHC results might hint at critical phenomena near the Planck scale;…”

mentioning

confidence: 99%

Fundamental Constants in Physics and Their Time Variation

Solà

2015

Preprint

View full text Add to dashboard Cite

In this Special Issue, we present a collection of fresh new articles, together with some review works, written by first-rate researchers in the field that offer the state-of-the-art on the subject of Fundamental Constants in Physics and Their Time Variation. There is no doubt that this is one of the hottest subjects in modern theoretical and experimental physics, with potential implications in all fundamental areas of physics research, such as particle physics, gravitation, astrophysics and cosmology.The history of this subject traces back mainly to Dirac's pioneering work in the thirties on the "large number hypothesis" [1] , from which a time evolution of the gravitational constant G was suggested, and later on the first discussions on new forms of the principle of equivalence emerged [2] and finally triggered the Jordan, Fierz and Brans-Dicke approach to gravity [3], in which General Relativity was extended to accommodate variations in G. It also triggered subsequent speculations by Gamow [4] and others on the possible variation of the fine structure constant.

show abstract

Dynamical systems analysis of the cubic galileon beyond the exponential potential and the cosmological analogue of the vDVZ discontinuity

Arcia

González

Horta-Rangel

et al. 2018

Class. Quantum Grav.

View full text Add to dashboard Cite

In this paper we generalize the dynamical systems analysis of the cubic galileon model previously investigated in [1] by including self-interaction potentials beyond the exponential one. It will be shown that, consistently with the results of [1], the cubic self-interaction of the galileon vacuum appreciably modifies the late-time cosmic dynamics by the existence of a phantom-like attractor (among other super-accelerated solutions that do not modify in any appreciable way the late-time dynamics and hence are not of interest in the present investigation). In contrast, in the presence of background matter the late-time cosmic dynamics remains practically the same as in the standard quintessence scenario. This means that we can not recover the cubic galileon vacuum continuously from the more general cubic quintessence with background matter, by setting to zero the matter energy density (and the pressure). This happens to be a kind of cosmological vDVZ discontinuity that can be evaded by means of the cosmological version of the Vainshtein screening mechanism. PACS numbers: 02.30.Hq, 04.20.Ha, 04.50.Kd, 05.45.-a, 98.80.-k I. INTRODUCTIONAccording to the increasing set of independent cosmological observations [2-8] the universe today is experiencing an accelerated expansion era. An unknown component dubbed as dark energy has been proposed to explain this recent acceleration in the context of the general relativity. The cosmological constant with equation of state ω = −1, is the simplest and the most accurate candidate according the observations [9]. However, it is plagued by serious theoretical issues such as the vacuum energy problem, the cosmic coincidence problem, the particle nature of dark matter, the validity of general relativity on large scales, and the age problem [10,11]. Since the observations allow the variation in time of the dark energy component, another possibility is to consider the existence of light scalar fields known as "quintessence" [12].Modified gravity represents an alternative approach for addressing the unusual cosmological dynamics at large scales. It is based on the modification of general relativity. We can observe two main streams in this context: introducing a Lagrangian built up of a Ricci, Riemann or another metric tensors as in the case of f (R, G) theories [13] and Brans-Dicke (BD) theories [14], or assuming the existence of additional dimensions that realize cosmic acceleration through the leakage of gravity into the extra-space at cosmological scales as in the Dvali-Gabadadze-Porrati (DGP) braneworld [15,16]. This latter model, however, is plagued by ghost instabilities that cast doubts on its validity. 1 Inspired by the DGP model, in [17] the authors proposed an infrared modification of gravity which is a generalization of the 4D effective theory in the DGP braneworld. The theory is invariant under the Galilean shift symmetry ∂ µ φ → ∂ µ φ + b µ in the Minkowski space-time, which keeps the equations of motion at second order. The scalar field that respects the Galilean symmetry is...

show abstract

Vacuum energy and the cosmological constant

Abstract: The accelerating expansion of the Universe points to a small positive value for the cosmological constant or vacuum energy density. We discuss recent ideas that the cosmological constant plus LHC results might hint at critical phenomena near the Planck scale.

Cited by 27 publications

References 92 publications

The Cosmological Constant and Stability of the Higgs Vacuum

The Cosmological Constant and Stability of the Higgs Vacuum

Fundamental Constants in Physics and Their Time Variation

Dynamical systems analysis of the cubic galileon beyond the exponential potential and the cosmological analogue of the vDVZ discontinuity

Contact Info

Product

Resources

About