Cosmological constraints on Λ(α) CDM models with time-varying fine structure constant
Sign Up to like & getrecommendations! Published in 2018 at "Annals of Physics"
DOI: 10.1016/j.aop.2018.08.015
Abstract: Abstract We study the Λ ( α ) CDM models with Λ ( α ) being a function of the time-varying fine structure constant α . We give a close look at the constraints on… read more here.
Keywords: varying fine; cdm models; time varying; fine structure ... See more keywords
A novel idea: Calculating anisotropic turbulence only by Kolmogorov structure constant Cn2 and power law α
Sign Up to like & getrecommendations! Published in 2020 at "Results in physics"
DOI: 10.1016/j.rinp.2020.103483
Abstract: Abstract As stated in the present research, the anisotropic non-Kolmogorov turbulence model is more in line with the actual turbulence. However, anisotropic factor is vital for the accuracy of calculations, and measuring it precisely is… read more here.
Keywords: structure constant; turbulence; kolmogorov structure; power law ... See more keywords
Impact of inhomogeneities on slowly rolling quintessence: implications for the local variations of the fine-structure constant
Sign Up to like & getrecommendations! Published in 2021 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/ac1870
Abstract: We study how the evolution of a dark energy quintessence fluid is modified by the presence of a matter inhomogeneity. To do so, we study linear perturbations of a flat FLRW background containing dust and… read more here.
Keywords: quintessence; slowly rolling; fine structure; structure constant ... See more keywords
Constraining the magnetic field on white dwarf surfaces; Zeeman effects and fine structure constant variation
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz739
Abstract: White dwarf (WD) atmospheres are subjected to gravitational potentials around 105 times larger than occur on Earth. They provide a unique environment in which to search for any possible variation in fundamental physics in the… read more here.
Keywords: field; white dwarf; magnetic field; fine structure ... See more keywords
Time-varying fine structure constant from naturally ultralight dark matter
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.104.075019
Abstract: We present a class of models in which the coupling of the photon to an ultralight scalar field that has a time-dependent vacuum expectation value causes the fine structure constant to oscillate in time. The… read more here.
Keywords: structure constant; time; dark matter; fine structure ... See more keywords
Current and future constraints on extended Bekenstein-type models for a varying fine-structure constant
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.97.023522
Abstract: There is a growing interest in astrophysical tests of the stability of dimensionless fundamental couplings, such as the fine-structure constant $\alpha$, as an optimal probe of new physics. The imminent arrival of the ESPRESSO spectrograph… read more here.
Keywords: current future; type models; bekenstein type; fine structure ... See more keywords
Two Clock Transitions in Neutral Yb for the Highest Sensitivity to Variations of the Fine-Structure Constant.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.120.173001
Abstract: We propose a new frequency standard based on a 4f^{14}6s6p ^{3}P_{0}-4f^{13}6s^{2}5d (J=2) transition in neutral Yb. This transition has a potential for high stability and accuracy and the advantage of the highest sensitivity among atomic clocks… read more here.
Keywords: highest sensitivity; two clock; sensitivity; fine structure ... See more keywords
Four direct measurements of the fine-structure constant 13 billion years ago
Sign Up to like & getrecommendations! Published in 2020 at "Science Advances"
DOI: 10.1126/sciadv.aay9672
Abstract: Fine-structure constant measurements 13 Ga ago, plus lower redshift data, test space-time variation of a fundamental constant. Observations of the redshift z = 7.085 quasar J1120+0641 are used to search for variations of the fine… read more here.
Keywords: structure constant; billion years; fine structure; four direct ... See more keywords
A limit on variations in the fine-structure constant from spectra of nearby Sun-like stars
Sign Up to like & getrecommendations! Published in 2022 at "Science"
DOI: 10.1126/science.abi9232
Abstract: The fine structure constant α sets the strength of the electromagnetic force. The Standard Model of particle physics provides no explanation for its value, which could potentially vary. The wavelengths of stellar absorption lines depend… read more here.
Keywords: per billion; structure constant; fine structure; spectra nearby ... See more keywords
Equivalent refractive-index structure constant of non-Kolmogorov turbulence: comment.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.462690
Abstract: The paper by Y. Li, W. Zhu, X. Wu, and R. Rao entitled "Equivalent refractive-index structure constant of non-Kolmogorov turbulence," Opt. Express23(18), 23004 (2015).10.1364/OE.23.023004 relates the non-Kolmogorov turbulence structure constant to the classical structure constant… read more here.
Keywords: kolmogorov turbulence; structure; non kolmogorov; structure constant ... See more keywords