Cosmological Frontiers in Fundamental Physics 2013
A formalism is proposed for perturbative string theory in spacetimes with totally compact space (and non-compact time).
Large scale structure contains vastly more Fourier modes than the CMB, and is therefore a promising arena for studying the early universe. One obstacle to using these modes is the non-linearity of structure formation.
Pulsar timing arrays (PTAs), which are currently operating around the world and achieving remarkable sensitivities in the ~1--‐100 nHz band, will observe supermassive black holes (SMBHs) at redshifts z
The Atacama Cosmology Telescope (ACT) has mapped the microwave sky to
arcminute scales. We present constraints on parameters from the observations at 148 and 217 GHz respectively by ACT from three years
of observations. Efficient map-making and spectrum-estimation techniques allow us to probe the acoustic peaks deep into the damping tail, and allow for
confirmation of the concordance model, and tests for deviations from
the standard cosmological picture. We fit a model of primary
cosmological and secondary foreground parameters to the dataset,
I explore the possibility that semi-classical back-reaction, due to the partners of the Hawking radiation quanta accumulating over the time for the black hole to lose about one half of its mass (the Page time), might cause the trapped surfaces to disappear, permitting unitary evolution without any cloning of quantum information.
After reviewing some of the highlights of the implications of the Planck
results for cosmic inflation (presentation to be coordinated with Hiranya Peiris), I will discuss
some recent developments
regarding future searches for B modes and other new science resulting from an
characterization of the microwave and far-infrared sky in polarization. I will
outline ideas for
a recently proposed large-class European Space Agency mission called PRISM.