Tag

Lorentz Invariance

All articles tagged with #lorentz invariance

A Fresh Tachyon Theory Reframes Time, Causality, and Relativity
space2 months ago

A Fresh Tachyon Theory Reframes Time, Causality, and Relativity

Physicists from the University of Warsaw and Oxford propose a revised tachyon quantum field theory that doubles the Hilbert space into a twin-space framework, restoring covariance and a stable vacuum while allowing faster-than-light particles to fit within relativity without paradoxes. The work is theoretical and conceptual, not experimental, and could reshape how time symmetry, causality, and quantum fields are understood, though it does not claim tachyons exist.

Cosmic data tighten the test of light’s speed, keeping relativity intact
space3 months ago

Cosmic data tighten the test of light’s speed, keeping relativity intact

A comprehensive review of 65 observations from pulsars, active galaxies, and gamma-ray bursts tightens the limits on any energy-dependent variation in photon speed, finding no violation of Lorentz invariance and reinforcing Einstein’s relativity; it also refines how such limits are calculated and points to future instruments for even tighter tests.

Gamma-Ray Tests Tighten Lorentz-Invariance Bounds, Not Break Special Relativity
science7 months ago

Gamma-Ray Tests Tighten Lorentz-Invariance Bounds, Not Break Special Relativity

New analysis of gamma-ray flares from pulsars, active galactic nuclei, and gamma-ray bursts finds no energy-dependent speed of light, placing stricter bounds on Lorentz-violating effects predicted by some quantum gravity theories. The results tighten the allowed violations by about 1.5 orders of magnitude and offer a framework for integrating new data into the SME; in short, SR remains consistent, while the search for quantum-gravity signatures continues.

Scientists Challenge Einstein's Speed Limit
science7 months ago

Scientists Challenge Einstein's Speed Limit

Scientists tested the possibility of breaking Einstein's speed of light rule by examining high-energy gamma rays from distant cosmic sources. Their findings confirmed Einstein's predictions, setting tighter limits on potential violations of Lorentz invariance and advancing our understanding of fundamental physics, though the quest to unify quantum theory and gravity continues.