On the possibility of the Dyson spheres observable beyond the infrared spectrum
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Astrobiology"
DOI: 10.1017/s1473550418000174
Abstract: Abstract In this paper, we revisit the Dysonian approach and assume that a superadvanced civilization is capable of building a cosmic megastructure located closer than the habitable zone (HZ). Then such a Dyson Sphere (DS)… read more here.
Keywords: possibility dyson; beyond infrared; dyson; dyson spheres ... See more keywords
A new discriminant for the Z-function and a Dyson-like repulsion for consecutive zeros
Sign Up to like & getrecommendations! Published in 2025 at "Physica Scripta"
DOI: 10.1088/1402-4896/adf3f1
Abstract: Let Z(t)=ζ12+ite−iθ(t) be the Hardy Z-function, where ζ(σ + it) is the Riemann zeta function and θ(t) is the Riemann-Siegel θ-function. In 1903 Gram introduced Gram’s law (−1)nZ(gn)>0, where gn is the unique solution of… read more here.
Keywords: function; dyson; new discriminant; discriminant function ... See more keywords
Infinite series of time-dependent Dyson maps
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Physics A: Mathematical and Theoretical"
DOI: 10.1088/1751-8121/ac31a0
Abstract: We propose and explore a scheme that leads to an infinite series of timedependent Dyson maps which associate different Hermitian Hamiltonians to a uniquely specified time-dependent non-Hermitian Hamiltonian. We identify the underlying symmetries responsible for… read more here.
Keywords: infinite series; dyson; time dependent; dyson maps ... See more keywords
A Dyson sphere around a black hole
Sign Up to like & getrecommendations! Published in 2021 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stab1832
Abstract: The search for extraterrestrial intelligence (SETI) has been conducted for nearly 60 yr. A Dyson sphere, a spherical structure that surrounds a star and transports its radiative energy outwards as an energy source for an advanced… read more here.
Keywords: sphere around; energy; black hole; dyson sphere ... See more keywords
Power spectra and autocovariances of level spacings beyond the Dyson conjecture.
Sign Up to like & getrecommendations! Published in 2023 at "Physical review. E"
DOI: 10.1103/physreve.107.l032201
Abstract: Introduced in the early days of random matrix theory, the autocovariances δI_{k}^{j}=cov(s_{j},s_{j+k}) of level spacings {s_{j}} accommodate detailed information on the correlations between individual eigenlevels. It was first conjectured by Dyson that the autocovariances of… read more here.
Keywords: autocovariances level; spectra autocovariances; power; level spacings ... See more keywords