Noncommutative spacetime geometry and one-loop effects in primordial cosmology
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review D"
DOI: 10.1103/physrevd.98.063518
Abstract: We study the effect of noncommutative spacetime geometry on one-loop corrections to the primordial curvature two-point function, arising from various forms of massless spectator matter fields interacting gravitationally with the inflaton. After deforming the algebra… read more here.
Keywords: spacetime geometry; one loop; cosmology; noncommutative spacetime ... See more keywords
Noncommutative spacetime and the PeV photons from Crab
Sign Up to like & getrecommendations! Published in 2023 at "Modern Physics Letters A"
DOI: 10.1142/s0217732323500074
Abstract: Considering the visible and the PeV photons from SN1054 to be emitted at similar times at the source, one estimates the value of a fundamental time constant [Formula: see text] arising in the noncommutative spacetime… read more here.
Keywords: photons crab; spacetime pev; noncommutative spacetime; pev photons ... See more keywords
A Poincaré Covariant Noncommutative Spacetime
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Geometric Methods in Modern Physics"
DOI: 10.1142/s0219887818501591
Abstract: We interpret, in the realm of relativistic quantum field theory, the tangential operator given by Coleman and Mandula [All possible symmetries of the s matrix, Phys. Rev. 159 (1967) 1251–1256] (see... read more here.
Keywords: poincar covariant; noncommutative spacetime; covariant noncommutative;