Tag

Spacetime

All articles tagged with #spacetime

space1 month ago•97 min saved

Spacetime crystals could spawn miniature black holes

Goethe University and TU Wien physicists propose that if spacetime can crystallize into a regular four‑dimensional lattice, a tiny energy perturbation could trigger a critical collapse that births microscopic black holes. Their work provides simple, exact solutions to Einstein’s equations for this process and suggests a possible primordial-black-hole pathway, but it does not prove such holes exist and notes they would evaporate quickly via Hawking radiation.

via Space|

#black-holes #general-relativity #primordial-black-holes

science1 month ago•6 min saved

Fractal Spacetime Could Trigger Tiny Black Holes, New Math Suggests

Physicists describe a spacetime “crystal” forming at the critical collapse threshold of black hole formation, where curvature repeats in a discrete self-similar pattern. A small energy perturbation can tip this crystal into a micro black hole. By formulating Einstein’s equations in many dimensions, researchers derived analytic descriptions of these fractal structures and found the same patterns persist even in lower dimensions, offering a new analytic framework for extreme-gravity phenomena. Published in Physical Review Letters.

via ScienceAlert|

#black-holes #critical-collapse #higher-dimensions

science4 months ago•8 min saved

Quantum Spacetime Alters Particle Paths, Rewriting Geodesics

Vienna University of Technology researchers quantized the spacetime metric to derive the q-desic equation, showing that in a quantum spacetime particles need not follow classical geodesics; while deviations from ordinary gravity are vanishingly small, including the cosmological constant can produce noticeable differences at cosmological scales, potentially offering an observational path to test quantum gravity.

via ScienceDaily|

#geodesics #observations #quantum-gravity

science4 months ago•10 min saved

Q-Desic: A Quantum Twist on Spacetime Opens Doors to Quantum Gravity Tests

Vienna University of Technology researchers derive a q-desic equation by quantizing the spacetime metric in a simple gravitational field, predicting that quantum spacetime can subtly alter particle trajectories. The deviations are minuscule on small scales, but when the cosmological constant is included they become significant at cosmological distances, potentially offering an observable to test and distinguish quantum gravity theories using astronomical data.

via SciTechDaily|

#cosmology #geodesics #quantum-gravity

science5 months ago•4 min saved

Gravity Emerges from Quantum Entropy: A Bold Entropic View of the Universe

A new theory proposes gravity is not fundamental but emerges from entropy, specifically quantum relative entropy, with spacetime acting as a quantum operator and a G-field linking matter and geometry. The approach aims to reconcile general relativity and quantum mechanics, potentially offering a fresh view on dark matter and the cosmological constant, though the idea remains unproven.

via The Daily Galaxy|

#dark-matter #entropic-gravity #gravity

science5 months ago•37 min saved

Entropy Could Be Gravity’s Hidden Origin, Pointing Toward Quantum Gravity

A new theory by physicist Ginestra Bianconi suggests gravity may emerge from entropy, potentially reconciling Einstein’s general relativity with quantum theory. By treating spacetime as a quantum operator and describing an entropic action that couples matter to geometry through a G-field, the framework aims to yield a small cosmological constant and offer a candidate explanation for dark matter. While intriguing, the idea remains speculative and requires substantial further work to confirm its viability as a unified theory of physics.

via Yahoo News Canada|

#dark-matter #entropy #gravity

science6 months ago•5 min saved

Geometry, not dark energy: a new gravity theory explains cosmic acceleration

Researchers propose an extended gravity theory called Finsler gravity that broadens spacetime geometry; when applied to the Friedmann equations, it naturally yields cosmic acceleration without a dark energy term, suggesting geometry could drive the universe’s speeding expansion.

via ScienceDaily|

#cosmology #dark-energy #finsler-gravity

science6 months ago•4 min saved

Black Hole's Twisting Effect Confirms Einstein's Predictions

Astronomers have directly observed a spinning black hole twisting spacetime, confirming Einstein's prediction of frame-dragging through the detection of Lense-Thirring precession during a tidal disruption event, using X-ray and radio telescopes, deepening our understanding of black hole physics and spacetime dynamics.

via The Daily Galaxy|

#black-hole #einstein #lense-thirring-precession

science6 months ago•4 min saved

Black Hole Twists Spacetime Confirming Einstein's Predictions

Astronomers have directly observed a spinning black hole twisting spacetime, confirming Einstein's century-old prediction of frame-dragging through the detection of wobbling in a star's debris disk and jets during a tidal disruption event, using X-ray and radio observations.

via SciTechDaily|

#astronomy #black-hole #lense-thirring-precession

science6 months ago•4 min saved

Wobbling Star Unveils Spacetime Twisting Near Black Hole

Astronomers observed a star being torn apart by a supermassive black hole in galaxy LEDA 145386, providing the most detailed evidence yet of frame-dragging, a prediction of general relativity, as the black hole's rotation twists spacetime around it.

via ScienceAlert|

#black-hole #frame-dragging #general-relativity

science7 months ago•1 min saved

Astronomers Confirm Spacetime Drag Around Black Hole, Validating Einstein's Predictions

Astronomers have directly observed a whirlpool in spacetime caused by a rapidly spinning black hole, providing the first empirical evidence of the Lense–Thirring precession, a phenomenon where a spinning black hole drags spacetime around with it, confirming a long-standing theoretical prediction.

via Yahoo|

#astronomy #black-hole #lense-thirring-precession

science7 months ago•2 min saved

Hidden Dimensions as the Source of Mass

New theoretical research suggests that the properties of matter and forces may originate from the geometry of unseen extra dimensions, specifically seven-dimensional shapes called G2-manifolds, with implications for understanding mass, cosmic expansion, and potentially discovering new particles like the 'Torstone.'

via ScienceDaily|

#hidden-dimensions #mass-origin #science

science8 months ago•2 min saved

Is the Higgs boson essential for mass creation?

A new study proposes that particle mass and fundamental forces could originate from the geometry of hidden extra dimensions, specifically through evolving seven-dimensional shapes called G₂-manifolds, potentially eliminating the need for the Higgs boson in explaining mass.

via Phys.org|

#extra-dimensions #geometry #higgs-boson

science9 months ago•6 min saved

New Theory Suggests the Universe Remembers All Events

A new theory called the quantum memory matrix proposes that spacetime is made of discrete cells that remember every interaction, potentially explaining phenomena like black holes, dark matter, and dark energy, and suggesting a cyclic universe with a finite informational age. The theory has been tested on quantum computers and offers a novel perspective on the universe as a cosmic memory bank and quantum computer.

via SciTechDaily|

#black-holes #dark-energy #dark-matter

science1 year ago•8 min saved

New Theory Connects Einstein's Relativity with Quantum Mechanics

Researchers at University College London propose a radical new theory suggesting that spacetime remains classical and unaffected by quantum mechanics, challenging the need to unify gravity and quantum physics by modifying Einstein's theory. Their approach could resolve longstanding paradoxes like black hole information loss and offers new experimental avenues to test the nature of spacetime, potentially transforming our understanding of the universe.

via The Brighter Side of News|

#general-relativity #gravity #postquantum-theory