Growth Rate of Large Scale Structure as a Powerful Probe of Dark Energy

Abstract

The redshift evolution of the growth rate of the gravitational potential, d(D/a)/dz, is an excellent discriminator of dark energy parameters and, in principle, more powerful than standard classical tests of cosmology. This evolution is directly observable through the integrated Sachs-Wolfe effect in cosmic microwave background (CMB) anisotropies. We consider the prospects of measuring the growth rate via a novel method employed through measurements of CMB polarization towards galaxy clusters. The potentially achievable errors on dark energy parameters are comparable and fully complementary to those expected from other upcoming tests of dark energy, making this test a highly promising tool of precision cosmology.

4 pages, 2 figures, submitted to Phys. Rev. Lett

References in corpus (1)

• Cosmological Constant - the Weight of the Vacuum

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