LAUSR

About LAUSR
Donate
Contact Us

Follow us:

You are not signed in:

Sign Up!


   Articles with "" as a keyword



Symmetries and charges of general relativity at null boundaries

Sign Up to like & get
recommendations! Published in 2018 at "Journal of High Energy Physics"

DOI: 10.1007/jhep11(2018)125

Abstract: A bstractWe study general relativity at a null boundary using the covariant phase space formalism. We define a covariant phase space and compute the algebra of symmetries at the null boundary by considering the boundary-preserving… read more here.

Keywords: algebra; relativity null; general relativity; null boundaries ... See more keywords

Complex null geodesics in the extended Schwarzschild universe

Sign Up to like & get
recommendations! Published in 2018 at "General Relativity and Gravitation"

DOI: 10.1007/s10714-018-2407-z

Abstract: The generic null geodesic of the Schwarzschild–Kruskal–Szekeres geometry has a natural complexification, an elliptic curve with a cusp at the singularity. To realize that complexification as a Riemann surface without a cusp, and also to… read more here.

Keywords: schwarzschild universe; extended schwarzschild; null geodesics; geodesics extended ... See more keywords

Asymptotic limit of null hypersurfaces

Sign Up to like & get
recommendations! Published in 2025 at "Classical and Quantum Gravity"

DOI: 10.1088/1361-6382/ae22b5

Abstract: We study null hypersurfaces approaching null infinity in asymptotically flat spacetimes within the Bondi–Sachs gauge. The null Raychaudhuri constraint is shown to asymptote to the Bondi mass-loss formula, interpreted as a stress tensor conservation law.… read more here.

Keywords: stress tensor; asymptotic limit; null hypersurfaces; null ... See more keywords

Near-null interferometry using an aspheric null lens generating a broad range of variable spherical aberration for flexible test of aspheres.

Sign Up to like & get
recommendations! Published in 2018 at "Optics express"

DOI: 10.1364/oe.26.031172

Abstract: A null lens moving back and forth relative to a point source can generate variable spherical aberration for flexible test of aspheres. Different from the previous methods, variable spherical aberration null theory was developed by… read more here.

Keywords: test; variable spherical; spherical aberration; near null ... See more keywords