Falsifying Cosmological Constant

Abstract

One of the main goals of physical cosmology is to reconstruct the expansion history of the universe and finding the actual model of dark energy. In this article I review the difficulties of understanding dark energy and discuss about two strategic approaches, 'reconstructing dark energy' and 'falsifying dark energy models'. While one can use the data to reconstruct the expansion history of the universe and the properties of dark energy using novel approaches, considering the data limitations and its uncertainties we have to deal with cosmographic degeneracies that makes it difficult to distinguish between different dark energy models. On the other hand one can use the power of the data to falsify an assumed model using advanced statistical techniques. Within all these issues, focusing on falsification of cosmological constant has a particular importance since finding any significant deviation from $\Lambda$ would result to a break through in theoretical physics, ruling out the standard concordance model of cosmology.

Proceedings of the 9th International Symposium on Cosmology and Particle Astrophysics, Taipei & Hsinchu, Taiwan 13-17 November 2012; 7 pages, 5 figures

References in corpus (14)

• Reconstructing Dark Energy
• Two new diagnostics of dark energy
• Gaussian Process Cosmography
• A general test of the Copernican Principle
• Nonparametric Dark Energy Reconstruction from Supernova Data
• Observables and unobservables in dark energy cosmologies
• A litmus test for Lambda
• Model Independent Reconstruction of the Expansion History of the Universe and the Properties of Dark Energy
• A new perspective on Dark Energy modeling via Genetic Algorithms
• A new null diagnostic customized for reconstructing the properties of dark energy from BAO data
• Crossing Statistic: Reconstructing the Expansion History of the Universe
• Bayesian Evidence for a Cosmological Constant using new High-Redshift Supernovae Data
• Non-parametric Dark Energy Degeneracies
• How Flat is Our Universe Really?

Cited by in corpus (4)

• Model independent evidence for dark energy evolution from Baryon Acoustic Oscillations
• Non-minimal Derivative Coupling Scalar Field and Bulk Viscous Dark Energy
• Observational constraints on the interacting dark energy - dark matter (IDM) cosmological models
• Dark energy homogeneity in general relativity: Are we applying it correctly?