NDLI: The cosmological constant

Content Provider	Springer Nature Link
Author	Bousso, Raphael
Copyright Year	2007
Abstract	The energy density of the vacuum, Λ, is at least 60 orders of magnitude smaller than several known contributions to it. Approaches to this problem are tightly constrained by data ranging from elementary observations to precision experiments. Absent overwhelming evidence to the contrary, dark energy can only be interpreted as vacuum energy, so the venerable assumption that Λ = 0 conflicts with observation. The possibility remains that Λ is fundamentally variable, though constant over large spacetime regions. This can explain the observed value, but only in a theory satisfying a number of restrictive kinematic and dynamical conditions. String theory offers a concrete realization through its landscape of metastable vacua.
Starting Page	607
Ending Page	637
Page Count	31
File Format	PDF
ISSN	00017701
Journal	General Relativity and Gravitation
Volume Number	40
Issue Number	2-3
e-ISSN	15729532
Language	English
Publisher	Springer US
Publisher Date	2007-12-11
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Astronomy, Astrophysics and Cosmology Quantum Physics Differential Geometry Relativity and Cosmology Mathematical and Computational Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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The cosmological constant