Articles tagged with Quantum Gravity
Physicists have long struggled to reconcile classical physics and quantum mechanics. New research by Stefano Liberati and colleagues proposes a scenario that preserves special relativity while introducing non-local effects. The model suggests space-time becomes granular at tiny scales, allowing for experimental testing of its predictions.
A new model applying ideas from complex networks has found that some quantum spaces might include hubs with significantly more links than others. Calculations indicate that these spaces are described by well-known quantum statistics, suggesting they could be useful for physicists working on quantum gravity.
Researchers at Caltech have successfully observed and controlled quantum motion in a large mechanical device, defying classical physics. By manipulating the inherent quantum noise, they were able to reduce its impact on measurement precision.
Nexus theory reconciles GR and Quantum Theory, explaining dark matter as the nexus graviton's constant rotational motion. The theory also sheds light on perplexing questions in physics, including a quantum description of Black Holes without singularities.
The Nexus theory provides a self-consistent explanation for Quantum Gravity, reconciling GR with Quantum Theory. It introduces the Nexus graviton, a composite particle that induces constant rotational motion and constitutes space-time.
Researchers Stefano Liberati and Luca Maccione suggest spacetime is a fluid with extremely low viscosity, contradicting Einstein's special relativity. This emergent model predicts novel effects on photon propagation, which could be observable with future astrophysical studies.
Researchers found that particles with mass experience different space-times depending on their direction of motion, while massless particles see the same space-time in all directions. This discovery challenges our understanding of isotropy in the universe.
Researchers propose a new quantum experiment using Planck-mass mirrors to test predictions of quantum gravity. The team's findings suggest that certain modifications predicted by quantum gravity proposals could be verified in the laboratory, potentially shedding light on the unification of quantum mechanics and general relativity.
Integral's observations show that quantum 'graininess' must be at much smaller scales than previously predicted, contradicting Einstein's General Theory of Relativity. The results limit the size of these grains to 10^-48 m or smaller, ruling out some string theories and quantum loop gravity theories.
Scientists investigate Hořava's quantum gravity model, which modifies Lorentz symmetry. The team finds that the modifications only reproduce general relativity on unobservable scales.
Dartmouth researchers have proposed a new method to create tiny quantum-sized black holes in the laboratory, allowing for better understanding of Hawking radiation. The SQUID-based setup enables exploration of analogue quantum gravitational effects and may be more straightforward for detecting Hawking radiation.
Theoretical physicists led by the University of Oregon's Stephen Hsu have found indications that grand unified theories may be merging into a single unified field. However, their research also suggests that this process could be slowed down or blocked by quantum fluctuations in space-time, making it more challenging to detect.
Researchers using Loop Quantum Gravity theory find a contracting universe before the Big Bounce, with space-time geometry similar to today's. A new mathematical model allows for precise analytical solutions and reveals a 'cosmic forgetfulness' due to extreme quantum forces during the Big Bounce.
Researchers Jens Gundlach and Stephen Merkowitz present the most precise measurement of Isaac Newton's gravitational constant, reducing uncertainty by nearly a factor of 100. Their calculations yield an Earth mass of approximately 5.972 sextillion metric tons.