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A New Cosmological Model of Quintessence and Dark Matter
Varun Sahni, Limin Wang
We propose a new class of quintessence models in which late times oscillations of a scalar field give rise to an effective equation of state which can be negative and hence drive t…
A Polarization Pursuers' Guide
Andrew H. Jaffe, Marc Kamionkowski, Limin Wang
We calculate the detectability of the polarization of the cosmic microwave background (CMB) as a function of the sky coverage, angular resolution, and instrumental sensitivity for…
The Cosmic Microwave Background Bispectrum and Inflation
Limin Wang, Marc Kamionkowski
We derive an expression for the non-Gaussian cosmic-microwave-background (CMB) statistic defined recently by Ferreira, Magueijo, and Górski in terms of the slow-roll-inflat…
Large-scale structure, the cosmic microwave background, and primordial non-gaussianity
Licia Verde, Limin Wang, Alan Heavens +1
Since cosmic-microwave-background (CMB) and large-scale-structure (LSS) data will shortly improve dramatically with the Microwave Anisotropy Probe (MAP) and Planck Surveyor, and th…
The Mass Power Spectrum in Quintessence Cosmological Models
Chung-Pei Ma, R. R. Caldwell, Paul Bode +1
We present simple analytic approximations for the linear and fully evolved nonlinear mass power spectrum for spatially flat cold dark matter (CDM) cosmological models with quintess…
Cosmic Concordance and Quintessence
Limin Wang, R. R. Caldwell, J. P. Ostriker +1
We present a comprehensive study of the observational constraints on spatially flat cosmological models containing a mixture of matter and quintessence --- a time varying, spatiall…
Cosmological Tracking Solutions
Paul J. Steinhardt, Limin Wang, Ivaylo Zlatev
A substantial fraction of the energy density of the universe may consist of quintessence in the form of a slowly-rolling scalar field. Since the energy density of the scalar field…
Cosmological Signature of New Parity-Violating Interactions
Arthur Lue, Limin Wang, Marc Kamionkowski
Does Nature yield any manifestations of parity violation other than those observed in weak interactions? A map of the cosmic microwave background (CMB) temperature and polarization…
Quintessence, Cosmic Coincidence, and the Cosmological Constant
Ivaylo Zlatev, Limin Wang, Paul J. Steinhardt
Recent observations suggest that a large fraction of the energy density of the universe has negative pressure. One explanation is vacuum energy density; another is quintessence in…
Cluster Abundance Constraints on Quintessence Models
Limin Wang, Paul J. Steinhardt
The abundance of rich clusters is a strong constraint on the mass power spectrum. The current constraint can be expressed in the form where is the $…
Resolving the Cosmological Missing Energy Problem
Greg Huey, Limin Wang, R. Dave +2
Some form of missing energy may account for the difference between the observed cosmic matter density and the critical density. Two leading candidates are a cosmological constant a…
On the Problem of Predicting Inflationary Perturbations
Limin Wang, V. F. Mukhanov, Paul J. Steinhardt
We examine the theoretical foundations of standard methods for computing density perturbations in inflationary models. We find that: (1) the time-delay formalism (introduced by Gut…