title: Beyond two dark energy parameters.
abstract: Our ignorance of dark energy is generally described by a two-parameter equation of state. In these approaches, a particular ad hoc functional form is assumed, and only two independent parameters are incorporated. We propose a model-independent, multiparameter approach to fitting dark energy and show that next-generation surveys will constrain the equation of state in three or more independent redshift bins to better than 10%. Future knowledge of dark energy will surpass two numbers (e.g., [w{0},w{1}] or [w{0},w{a}]), and we propose a more flexible approach to the analysis of present and future data.
authors.affiliation: Department of Physics and Astronomy, University of California, Irvine, California 92697, USA.
authors.forename: Devdeep
authors.initials: D
authors.lastname: Sarkar
authors.forename: Scott
authors.initials: S
authors.lastname: Sullivan
authors.forename: Shahab
authors.initials: S
authors.lastname: Joudaki
authors.forename: Alexandre
authors.initials: A
authors.lastname: Amblard
authors.forename: Daniel E
authors.initials: DE
authors.lastname: Holz
authors.forename: Asantha
authors.initials: A
authors.lastname: Cooray