[P]article detectors in De Sitter space respond as if they are immersed in a bath of thermal radiation. However, the stress energy momentum tensor in… - Paul Davies

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[P]article detectors in De Sitter space respond as if they are immersed in a bath of thermal radiation. However, the stress energy momentum tensor in De Sitter space is not that of thermal radiation. It's just a renormalization of the cosmological constant. So there's something a bit funny about the thermal nature of De Sitter space, and I've been interested in whether you can mine that thermal stuff...

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About Paul Davies

Paul Charles William Davies, AM (born 22 April 1946) is an English physicist, writer and broadcaster, a professor at Arizona State University as well as the Director of BEYOND: Center for Fundamental Concepts in Science. His research interests are in the fields of cosmology, quantum field theory, and astrobiology.

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Birth Name: Paul Charles William Davies
Alternative Names: P. C. W. Davies
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All this prompts the question of why, from the infinite rage of possible values that Nature could have selected for the fundamental constants, and from the infinite variety of initial conditions that could have characterized the primeval universe, the actual values and conditions conspire to produce the particular range of special features that we observe. For clearly the universe is a very special place: exceedingly uniform on a large scale, yet not so precisely uniform that galaxies could not form; extremely low entropy per proton, and hence cool enough for chemistry to happen; almost zero cosmic propulsion and an expansion rate tuned to that energy content to unbelievable accuracy; values for the strengths of its forces that permit nuclei to exist, yet do not burn up all the cosmic hydrogen, and many more apparent accidents of fortune.

Perhaps the most exquisite example of information in biology... During embryogenesis there's the most meticulous choreography of organized information, so all the right bits end up in the right place, at the right time. ...[T]he power of information to sculpt [living] physical forms.

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