The cosmological constant, the fate of the universe, unimodular gravity, and all that

Abstract
The cosmological constant is back. Several lines of evidence point to the conclusion that either there is a positive cosmological constant or else the universe is filled with a strange form of matter (“quintessence”) that mimics some of the effects of a positive lambda. This paper investigates the implications of the former possibility. Two senses in which the cosmological constant can be a constant are distinguished: the capital Λ sense in which lambda is a universal constant on a par with the charge of the electron, and the lower case λ sense in which lambda is a humble constant of integration. The latter interpretation has been touted as the means to a solution to various problems in physics. These claims are critically examined with an eye to discerning the implications for philosophy of science and foundations of physics.
Keywords Philosophy of physics
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DOI 10.1016/S1355-2198(03)00063-7
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References found in this work BETA
Symmetry and Gauge Freedom.Gordon Belot - 2003 - Studies in History and Philosophy of Science Part B 34 (2):189-225.
Gauge Matters.John Earman - 2002 - Proceedings of the Philosophy of Science Association 2002 (3):S209--20.
Gauge Principles, Gauge Arguments and the Logic of Nature.Christopher A. Martin - 2002 - Proceedings of the Philosophy of Science Association 2002 (3):S221-S234.
Symmetries and Noether's Theorems.Katherine Bracing & Harvey R. Brown - 2003 - In Katherine A. Brading & Elena Castellani (eds.), Symmetries in Physics: Philosophical Reflections. Cambridge University Press. pp. 89.

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