Algebraically special vacuum gravitational fields with a cosmological constant

1996 ◽  
Vol 39 (6) ◽  
pp. 585-590
Author(s):  
V. N. Timofeev
Keyword(s):  
Cosmological Constant ◽  
Gravitational Fields ◽  
Special Vacuum

scholarly journals On the canonical energy of weak gravitational fields with a cosmological constant $$\varLambda \in \mathbb {R}$$

2021 ◽  
Vol 81 (8) ◽  
Author(s):  
P. T. Chruściel ◽  
Sk J. Hoque ◽  
M. Maliborski ◽  
T. Smołka
Keyword(s):  
Cosmological Constant ◽  
De Sitter ◽  
Gravitational Fields ◽  
Link Type ◽  
Bondi Mass ◽  
Asymptotic Symmetries

AbstractWe analyse the canonical energy of vacuum linearised gravitational fields on light cones on a de Sitter, Minkowski, and Anti de Sitter backgrounds in Bondi gauge. We derive the associated asymptotic symmetries. When $$\varLambda >0$$ Λ > 0 the energy diverges, but a renormalised formula with well defined flux is obtained. We show that the renormalised energy in the asymptotically off-diagonal gauge coincides with the quadratisation of the generalisation of the Trautman–Bondi mass proposed in Chruściel and Ifsits (Phys Rev D 93:124075, arXiv:1603.07018 [gr-qc], 2016).

scholarly journals Dark energy from gravitational corrections

2017 ◽  
Vol 32 (06n07) ◽  
pp. 1750037 ◽  
Author(s):  
Yugo Abe ◽  
Masaatsu Horikoshi ◽  
Yoshiharu Kawamura
Keyword(s):  
Field Theory ◽  
Dark Energy ◽  
Cosmological Constant ◽  
Effective Field Theory ◽  
Vacuum Energy ◽  
Effective Field ◽  
Microscopic Level ◽  
Cosmological Constant Problem ◽  
Gravitational Fields ◽  
Dominant Part

We study physics concerning the cosmological constant problem in the framework of effective field theory and suggest that a dominant part of dark energy can originate from gravitational corrections of vacuum energy, under the assumption that the classical gravitational fields do not couple to a large portion of the vacuum energy effectively, in spite of the coupling between graviton and matters at a microscopic level. Our speculation is excellent with terascale supersymmetry.

Topographic surfaces and gravitational fields of the Earth, Moon and terrestrial planets

2000 ◽  
Vol 6 (1) ◽  
pp. 56-63
Author(s):  
K.K. Kamensky ◽  
V.S. Kislyuk ◽  
Ya.S. Yatskiv ◽  
◽  
Keyword(s):  
Terrestrial Planets ◽  
Gravitational Fields ◽  
The Earth
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