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pro vyhledávání: '"Hogan, Craig"'
Autor:
Hogan, Craig
Cosmic structure on the largest scales preserves the pattern laid down by quantum fluctuations of gravity in the early universe on scales comparable to inflationary horizons. It is proposed here that fluctuations create physical correlations only wit
Externí odkaz:
http://arxiv.org/abs/2403.19870
We test the hypothesis that angular correlations of gravitationally-induced temperature anisotropy in the cosmic microwave background (CMB) vanish over a range of large angular separations constrained by causality. Standard conformal geometry is used
Externí odkaz:
http://arxiv.org/abs/2312.16147
Autor:
Mackewicz, Kris, Hogan, Craig
We analyze the classical linear gravitational effect of idealized pion-like dynamical systems, consisting of light quarks connected by attractive gluonic material with a stress-energy $p=-\rho c^2$ in one or more dimensions. In one orbit of a system
Externí odkaz:
http://arxiv.org/abs/2305.04864
Publikováno v:
Phys. Rev. D 109, 123505 (2024)
Scaling arguments are used to constrain the angular spectrum of distortions on boundaries of macroscopic causal diamonds, produced by Planck-scale vacuum fluctuations of causally-coherent quantum gravity. The small-angle spectrum of displacement is d
Externí odkaz:
http://arxiv.org/abs/2303.06563
We develop a model for correlations of cosmic microwave background anisotropy on the largest angular scales, based on standard causal geometrical relationships in slow-roll inflation. Unlike standard models based on quantized field modes, it describe
Externí odkaz:
http://arxiv.org/abs/2303.02765
Autor:
Hogan, Craig
Quantum field theory, which is generally used to describe the origin of large-scale gravitational perturbations during cosmic inflation, has been shown to omit an important physical effect in curved space-time, the nonlocal entanglement among quantiz
Externí odkaz:
http://arxiv.org/abs/2203.16731
We examine all-sky cosmic microwave background (CMB) temperature maps on large angular scales to compare their consistency with two scenarios: the standard inflationary quantum picture, and a distribution constrained to have a universal variance of p
Externí odkaz:
http://arxiv.org/abs/2110.00120
Autor:
Hogan, Craig, Meyer, Stephan S.
We consider the hypothesis that nonlocal, omnidirectional, causally-coherent quantum entanglement of inflationary horizons may account for some well-known measured anomalies of Cosmic Microwave Background (CMB) anisotropy on large angular scales. It
Externí odkaz:
http://arxiv.org/abs/2109.11092
Autor:
Aiello, Lorenzo, Richardson, Jonathan W., Vermeulen, Sander M., Grote, Hartmut, Hogan, Craig, Kwon, Ohkyung, Stoughton, Chris
Publikováno v:
Phys. Rev. Lett. 128, 121101 (2022)
Low-mass (sub-eV) scalar field dark matter may induce apparent oscillations of fundamental constants, resulting in corresponding oscillations of the size and the index of refraction of solids. Laser interferometers are highly sensitive to changes in
Externí odkaz:
http://arxiv.org/abs/2108.04746
Autor:
Mackewicz, Kris, Hogan, Craig
A linear analytical solution is derived for the gravitational shock wave produced by a particle of mass $M$ that decays into a pair of null particles. The resulting space-time is shown to be unperturbed and isotropic, except for a discontinuous pertu
Externí odkaz:
http://arxiv.org/abs/2108.03264