Holography and Variable Cosmological Constant

Details Holography and Variable Cosmological Constant Holography and Variable Cosmological Constant

2004-04-09

arxiv.org/abs/astro-ph/0404204v4

Phys.Rev.D70:087301,2004

Astronomy and Astrophysics

Astrophysics

7 pages, final version accepted by PRD

Scientific paper

10.1103/PhysRevD.70.087301

An effective local quantum field theory with UV and IR cutoffs correlated in accordance with holographic entropy bounds is capable of rendering the cosmological constant (CC) stable against quantum corrections. By setting an IR cutoff to length scales relevant to cosmology, one easily obtains the currently observed rho_Lambda ~ 10^{-47} GeV^4, thus alleviating the CC problem. It is argued that scaling behavior of the CC in these scenarios implies an interaction of the CC with matter sector or a time-dependent gravitational constant, to accommodate the observational data.

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