515 citations · 4.3k across the 76 of their papers we have counts for
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Exploring Parameter Constraints on Quintessential Dark Energy: the Inverse Power Law Model
Mark Yashar, Brandon Bozek, Augusta Abrahamse +2
We report on the results of a Markov Chain Monte Carlo (MCMC) analysis of an inverse power law (IPL) quintessence model using the Dark Energy Task Force (DETF) simulated data sets…
A measure of the impact of future dark energy experiments based on discriminating power among quintessence models
Michael Barnard, Augusta Abrahamse, Andreas Albrecht +2
We evaluate the ability of future data sets to discriminate among different quintessence dark energy models. This approach gives an alternative measure for assessing the impact of…
Exploring Parameter Constraints on Quintessential Dark Energy: The Exponential Model
Brandon Bozek, Augusta Abrahamse, Andreas Albrecht +1
We present an analysis of a scalar field model of dark energy with an exponential potential using the Dark Energy Task Force (DETF) simulated data models. Using Markov Chain Monte…
Exploring Parameter Constraints on Quintessential Dark Energy: the Pseudo-Nambu Goldstone Boson Model
Augusta Abrahamse, Andreas Albrecht, Michael Barnard +1
We analyze the constraining power of future dark energy experiments for Pseudo-Nambu Goldstone Boson (PNGB) quintessence. Following the Dark Energy Task Force methodology, we forec…
Exploring Parameter Constraints on Quintessential Dark Energy: the Albrecht-Skordis model
Michael Barnard, Augusta Abrahamse, Andreas Albrecht +2
We consider the effect of future dark energy experiments on ``Albrecht-Skordis'' (AS) models of scalar field dark energy using the Monte-Carlo Markov chain method. We deal with the…
The case for an aggressive program of dark energy probes
Andreas Albrecht
The observed cosmic acceleration presents the physics and cosmology communities with amazing opportunities to make exciting, probably even radical advances in these fields. This to…
Report of the Dark Energy Task Force
Andreas Albrecht, Gary Bernstein, Robert Cahn +10
Dark energy appears to be the dominant component of the physical Universe, yet there is no persuasive theoretical explanation for its existence or magnitude. The acceleration of th…
Evaluating Dark Energy Probes using Multi-Dimensional Dark Energy Parameters
Andreas Albrecht, Gary Bernstein
We investigate the value of future dark energy experiments by modeling their ability to constrain the dark energy equation of state. Similar work was recently reported by the Dark…
Talk about Pivots
Damien Martin, Andreas Albrecht
We consider two different methods of parameterizing the dark energy equation of state in order to assess possible ``figures of merit'' for evaluating dark energy experiments. The t…
Weak Lensing and Supernovae: Complementary Probes of Dark Energy
L. Knox, A. Albrecht, Y. S. Song
Weak lensing observations and supernova observations, combined with CMB observations, can both provide powerful constraints on dark energy properties. Considering statistical error…
Next-generation test of cosmic inflation
Benjamin Gold, Andreas Albrecht
The increasing precision of cosmological datasets is opening up new opportunities to test predictions from cosmic inflation. Here we study the impact of high precision constraints…
Natural Quintessence and Large Extra Dimensions
A. Albrecht, C. P. Burgess, F. Ravndal +1
We examine the late-time (nucleosynthesis and later) cosmological implications of brane-world scenarios having large (millimeter sized) extra dimensions. In particular, recent prop…
Future Supernovae observations as a probe of dark energy
Jochen Weller, Andreas Albrecht
We study the potential impact of improved future supernovae data on our understanding of the dark energy problem. We carefully examine the relative utility of different fitting fun…
Planck-scale quintessence and the physics of structure formation
Constantinos Skordis, Andreas Albrecht
In a recent paper we considered the possibility of a scalar field providing an explanation for the cosmic acceleration. Our model had the interesting properties of attractor-like b…
Defect models of cosmic structure in light of the new CMB data
Andreas Albrecht
Defect models of cosmic structure formation have faced a number of difficult challenges over recent years. Yet interestingly, new CMB data does not show strong evidence for seconda…
Cosmic Inflation
Andreas Albrecht
I review the current status of the theory of Cosmic Inflation. My discussion covers the motivation and implementation of the idea, as well as an analysis of recent successes and op…
Phenomenology of a realistic accelerating universe using only Planck-scale physics
Andreas Albrecht, Constantinos Skordis
Modern data is showing increasing evidence that the Universe is accelerating. So far, all attempts to account for the acceleration have required some fundamental dimensionless quan…
Can inflationary models of cosmic perturbations evade the secondary oscillation test?
Alex Lewin, Andreas Albrecht
We consider the consequences of an observed Cosmic Microwave Background (CMB) temperature anisotropy spectrum containing no secondary oscillations. While such a spectrum is general…
Cosmology with a time-varying speed of light
Andreas Albrecht
Cosmic inflation is the only known mechanism with the potential to explain the very special initial conditions which are required at the early stages of the evolution of our univer…
A time varying speed of light as a solution to cosmological puzzles
Andreas Albrecht, Joao Magueijo
We consider the cosmological implications of light travelling faster in the early Universe. We propose a prescription for deriving corrections to the cosmological evolution equatio…
Reionization by active sources and its effects on the cosmic microwave background
Jochen Weller, Richard A. Battye, Andreas Albrecht
We investigate the possible effects of reionization by active sources on the cosmic microwave background. We concentrate on the sources themselves as the origin of reionization, ra…
A new statistic for picking out Non-Gaussianity in the CMB
Alex Lewin, Andreas Albrecht, Joao Magueijo
In this paper we propose a new statistic capable of detecting non-Gaussianity in the CMB. The statistic is defined in Fourier space, and therefore naturally separates angular scale…
What is the future of causal models of cosmic structure formation?
Andreas Albrecht
Recent research has severely constrained the standard ``defect'' models of cosmic structure formation. Here I discuss the nature of the problems with defect models, and place this…
A detail study of defect models for cosmic structure formation
A. Albrecht, R. A. Battye, J. Robinson
We calculate predictions from wide class of `active' models of cosmic structure formation which allows us to scan the space of possible defect models. We calculate the linear cold…