A Friedmann-Lemaitre-Robertson-Walker cosmological model with running Lambda

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dc.creatorShapiro, Ilya L.
dc.creatorSola, Joan
dc.date2004-01-03
dc.date2004-01-25
dc.date.accessioned2026-07-07T02:11:46Z
dc.date.available2026-07-07T02:11:46Z
dc.descriptionThe idea of a variable dark energy has been entertained many times in the literature and from many different points of view. Quintessence is just a popular way to implement this idea in recent times, but so far with little success. Another possibility is to think of the cosmological term, Lambda, as a ``running quantity'' much in the same way as the electromagnetic coupling constant. However, the fact that Lambda is a dimension-four parameter implies that it may obey a peculiar renormalization group equation, which at low energies could be dominated by ``soft decoupling'' contributions of the form Lambda ~ H^2 M_P^2 stemming from physics near the Planck scale. This value lies in the ballpark of the measurements from CMB and high-z supernovae. A ``renormalized'' FLRW cosmology of this kind may reveal itself as a sound, and testable, proposal for a variable Lambda model within quantum field theory in curved space time.
dc.descriptionInvited talk at the International Workshop on Astroparticle and High-Energy Physics (AHEP-2003). Corrected misprint
dc.identifierhttps://arxiv.org/abs/astro-ph/0401015
dc.identifierhttp://arxiv.org/abs/astro-ph/0401015
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7217
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleA Friedmann-Lemaitre-Robertson-Walker cosmological model with running Lambda
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