New primordial-magnetic-field limit from the latest LIGO S5 data

Wang, Shuang

doi:10.1103/physrevd.81.023002

Cited by 17 publications

(5 citation statements)

References 64 publications

(74 reference statements)

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“…Finally, we remark that the resultant field strength of ∼ 10 −9 G on 1Mpc scale is compatible with the upper limit of ∼ 2-6 × 10 −9 G obtained from the observation of CMB radiation [60,61] as well as that of being smaller than 4.8 × 10 −9 G from CMB radiation on the present strength with scales larger than the present horizon [62]. There also exist constraints on the strength of the large-scale magnetic fields from the matter density fluctuation parameter σ 8 [63], the fifth science (S5) run of laser interferometer gravitational-wave observatory (LIGO) [64], Chandra X-ray galaxy cluster survey and Sunyaev-Zel'divich (S-Z) survey [65], which are compatible with or weaker than those from CMB. Incidentally, generic features of the spectrum of the large-scale magnetic fields generated at the inflationary stage have been investigated in ref.…”

Section: Discussionmentioning

confidence: 99%

Generation of large-scale magnetic fields from inflation in teleparallelism

Bamba

Geng

Luo

2012

J. Cosmol. Astropart. Phys.

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We explore the generation of large-scale magnetic fields from inflation in teleparallelism, in which the gravitational theory is described by the torsion scalar instead of the scalar curvature in general relativity. In particular, we examine the case that the conformal invariance of the electromagnetic field during inflation is broken by a non-minimal gravitational coupling between the torsion scalar and the electromagnetic field. It is shown that for a power-law type coupling, the magnetic field on 1 Mpc scale with its strength of ∼ 10

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Section: Discussionmentioning

confidence: 99%

Generation of large-scale magnetic fields from inflation in teleparallelism

Bamba

Geng

Luo

2012

J. Cosmol. Astropart. Phys.

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“…There has also been an attempt to constrain the PMF field strength from direct measurements of limits to the present cosmological GWB. [59] has deduced the constraint B λ < 4 × 10 −7 G at 1 Mpc and B λ < 9 × 10 −11 G at 100 Mpc from the LIGO S5 data [60].…”

Section: Constraints From Bbn and The Gwbmentioning

confidence: 99%

“…Several groups [49,59] have studied the GWB induced by a PMF. From such studies, one expects that there is a degeneracy between the GWB from inflation and that generated by a PMF.…”

Section: Pmf and Gwbmentioning

confidence: 99%

The search for a primordial magnetic field

et al. 2012

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Magnetic fields appear wherever plasma and currents can be found. As such, they thread through all scales in Nature. It is natural, therefore, to suppose that magnetic fields might have been formed within the high temperature environments of the big bang. Such a primordial magnetic field (PMF) would be expected to arise from and/or influence a variety of cosmological phenomena such as inflation, cosmic phase transitions, big bang nucleosynthesis, the cosmic microwave background (CMB) temperature and polarization anisotropies, the cosmic gravity wave background, and the formation of largescale structure. In this review, we summarize the development of theoretical models for analyzing the observational consequences of a PMF. We also summarize the current state of the art in the search for observational evidence of a PMF. In particular we review the framework needed to calculate the effects of a PMF power spectrum on the CMB and the development of large scale structure. We summarize the current constraints on the PMF amplitude B λ and the power spectral index n B and discuss prospects for better determining these quantities in the near future.

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“…DE can also leave characteristic features on the spectrum of primordial gravitational waves[167,168,169], which may be detected via the measurements of CMB B-mode polarization[170,171,172,173].…”

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confidence: 99%

Holographic dark energy

2017

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We review the paradigm of holographic dark energy (HDE), which arises from a theoretical attempt of applying the holographic principle (HP) to the dark energy (DE) problem. Making use of the HP and the dimensional analysis, we derive the general formula of the energy density of HDE. Then, we describe the properties of HDE model, in which the future event horizon is chosen as the characteristic length scale. We also introduce the theoretical explorations and the observational constraints for this model. Next, in the framework of HDE, we discuss various topics, such as spatial curvature, neutrino, instability of perturbation, time-varying gravitational constant, inflation, black hole and big rip singularity. In addition, from both the theoretical and the observational aspects, we introduce the interacting holographic dark energy scenario, where the interaction between dark matter and HDE is taken into account. Furthermore, we discuss the HDE scenario in various modified gravity (MG) theories, such as Brans-Dicke theory, braneworld theory, scalar-tensor theory, Horava-Lifshitz theory, and so on. Besides, we introduce the attempts of reconstructing various scalar-field DE and MG models from HDE. Moreover, we introduce other DE models inspired by the HP, in which different characteristic length scales are chosen. Finally, we make comparisons among various HP-inspired DE models, by using cosmological observations and diagnostic tools.

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New primordial-magnetic-field limit from the latest LIGO S5 data

Cited by 17 publications

References 64 publications

Generation of large-scale magnetic fields from inflation in teleparallelism

Generation of large-scale magnetic fields from inflation in teleparallelism

The search for a primordial magnetic field

Holographic dark energy

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