Results 41 to 50 of about 196,671 (220)

Anselm's Temporal‐Ontological Proof

open access: yesNoûs, Volume 60, Issue 3, Page 645-660, September 2026.
ABSTRACT In his Reply to Gaunilo, Anselm presented two additional arguments for the existence of God beyond those that appear in the Proslogion. In “The Logical Structure of Anselm's Argument,” Robert M. Adams isolates each. One, he develops into a modal ontological argument along the lines of other 20th century ontological arguments (e.g., those of ...
Daniel Rubio
wiley   +1 more source

Shadow in the Galactic Center: Theoretical Concept – Prediction – Realization

open access: yesNatural Science Review
General Relativity (GR) was created in November 1915, and since its creation this theory has undergone many tests. The first realistic cosmological models were proposed in the works of Friedmann, written in the 1920s.
A. F. Zakharov
doaj   +1 more source

Off-diagonal cosmological solutions in emergent gravity theories and Grigory Perelman entropy for geometric flows

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
We develop an approach to the theory of relativistic geometric flows and emergent gravity defined by entropy functionals and related statistical thermodynamics models. Nonholonomic deformations of G.
Sergiu I. Vacaru   +2 more
doaj   +1 more source

Aharonov–Bohm Effect for Cooper Pairs in Kerr Spacetime: Gravitomagnetic Phase Shifts From Frame Dragging

open access: yesAnnalen der Physik, Volume 538, Issue 8, August 2026.
ABSTRACT The unification of quantum mechanics and general relativity remains a central problem in fundamental physics. Here, we study the gravitomagnetic Aharonov–Bohm (AB) effect for Cooper pairs in Kerr spacetime. Frame‐dragging by a rotating black hole (BH) generates an effective vector potential through the off‐diagonal metric term gtϕ$g_{t\phi }$,
Erdem Sucu, İzzet Sakallı
wiley   +1 more source

Zagadnienia kosmologiczne przed Einsteinem

open access: yesZagadnienia Filozoficzne w Nauce, 2005
Einstein's first cosmological work, published in 1917, marked the beginning of relativistic cosmology, but it was well founded on earlier questions concerning the world as a whole.
Michał Heller
doaj  

Loop quantum cosmology and singularities

open access: yesScientific Reports, 2017
Loop quantum gravity is believed to eliminate singularities such as the big bang and big crunch singularity. This belief is based on studies of so-called loop quantum cosmology which concerns symmetry-reduced models of quantum gravity. In this paper, the
Ward Struyve
doaj   +1 more source

SIMPLE COSMOLOGICAL MODEL WITH RELATIVISTIC GAS [PDF]

open access: yesModern Physics Letters A, 2005
We construct simple and useful approximation for the relativistic gas of massive particles. The equation of state is given by an elementary function and admits analytic solution of the Friedmann equation, including more complex cases when the relativistic gas of massive particles is considered together with radiation or with dominating cosmological ...
de Berredo-Peixoto, Guilherme   +2 more
openaire   +3 more sources

The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory

open access: yesAstronomische Nachrichten, Volume 347, Issue 7, August 2026.
ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth   +20 more
wiley   +1 more source

Weyl's principle, cosmic time and quantum fundamentalism [PDF]

open access: yes, 2010
We examine the necessary physical underpinnings for setting up the cosmological standard model with a global cosmic time parameter. In particular, we discuss the role of Weyl's principle which asserts that cosmic matter moves according to certain ...
Zinkernagel, Henrik, Rugh, Svend E.
core  

Renormalization group approach to relativistic cosmology [PDF]

open access: yesPhysical Review D, 1995
We discuss the averaging hypothesis tacitly assumed in standard cosmology. Our approach is implemented in a "3+1" formalism and invokes the coarse graining arguments, provided and supported by the real-space Renormalization Group (RG) methods. Block variables are introduced and the recursion relations written down explicitly enabling us to characterize
CARFORA, MAURO, PIOTRKOWSKA K.
openaire   +3 more sources

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