Home Newsletter
News Books
Welcome to FreeScience.info Language/Lingua

Books 3054
· Book News
· Most clicked
· Least clicked

Search for a Book
Add a new Book

Everything You Always Wanted To Know About The Cosmological Constant Problem (But Were Afraid To Ask)

Author: Jerome Martin
Url: http://arxiv.org/abs/1205.3365
Format: Ps, Pdf
Year: 2012
Category: Cosmology
Pages: 89
Clicks: 1340

This article aims at discussing the cosmological constant problem at a pedagogical but fully technical level. We review how the vacuum energy can be regularized in flat and curved space-time and how it can be understood in terms of Feynman bubble diagrams. In particular, we show that the properly renormalized value of the zero-point energy density today (for a free theory) is in fact far from being 122 orders of magnitude larger than the critical energy density, as often quoted in the literature. We mainly consider the case of scalar fields but also treat the cases of fermions and gauge bosons which allows us to discuss the question of vacuum energy in super-symmetry. Then, we discuss how the cosmological constant can be measured in cosmology and constrained with experiments such as measurements of planet orbits in our solar system or atomic spectra. We also review why the Lamb shift and the Casimir effect seem to indicate that the quantum zero-point fluctuations are not an artifact of the quantum field theory formalism. We investigate how experiments on the universality of free fall can constrain the gravitational properties of vacuum energy and we discuss the status of the weak equivalence principle in quantum mechanics, in particular the Collela, Overhausser and Werner experiment and the quantum Galileo experiment performed with a Salecker-Wigner-Peres clock. Finally, we briefly conclude with a discussion on the solutions to the cosmological constant problem that have been proposed so far.

Similar Books
Superstring Cosmology
Numerical Simulations in Cosmology I
Cosmology from Topological Defects
TASI Lectures: Introduction to Cosmology
Introduction to relativistic astrophysics and cosmology
Introduction to cosmology
Particle Physics and Inflationary Cosmology
Advanced Topics in Cosmology: A Pedagogical Introductio
Introduction to relativistic astrophysics and cosmology through
An introduction to quantum cosmology
Ekpyrotic and Cyclic Cosmology
Cosmology for Particle Physicists
Dwarf-Galaxy Cosmology
Particle Physics Aspects of Modern Cosmology
Introduction to Cosmology
A practical guide to Basic Statistical Techniques for Data Analysis in Cosmology
Supernova cosmology: legacy and future
Primordial magnetogenesis
Introduction to Early Universe Cosmology
Relativité et Cosmologie
Cosmology and Structure Formation
Advances in Modern Cosmology
Tides in colliding galaxies
Observational Probes of Cosmic Acceleration
Saas-Fee Lecture Notes: Multi-messenger Astronomy and Dark Matter
Preludes to dark energy: Zero-point energy and vacuum speculations
Large Scale Structure of the Universe
A Review of the Universe - Structures, Evolutions, Observations, and Theories
This text aims to give a pedagogical introduction into the main concepts of the theory of structure formation in the univers
Lectures On Galois Cohomology of ClassicalGroups
Cosmology Primer
The Astrophysics of the Intracluster Plasma
Dark Energy: Observational Evidence and Theoretical Models

Home |  Authors | About | Contact Us |  Email 
 Copyright © 2002-2013 FreeScience.info. 

Best viewed with Mozilla 1.X 1024x768
free scientific books