where a(t) is the cosmic scale factor which describes expansion in time, and (R, , ) are spherical comoving coordinates.The constant k determines the geometry of the metric; it is positive in a closed Universe, zero in a flat Universe, and negative in an open Universe. Observers at rest remain at rest, at fixed (R, , ), with their physical separation increasing with time in proportion to a(t).
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Full text of "Condensed Matter Field theory [electronic resource]" See other formats.
Hello friends of astrobiologists, welcome back to our monthly series, Ask an Astrobiologist, from saganet.org. Every month we get together and interview a renowned scientist from all over the world, and this month we are privileged to have Juan Prez Mercader, who is a senior research fellow at Harvard University, and has a distinguished international career.
PDF | Motivated by recent interest in detecting ultra-light dark matter using a new generation of atom interferometers, we investigate open quantum systems coupled to an environment with massive.
A dictionary file. dict_files/eng_com.dic This class can parse, analyze words and interprets sentences. It takes an English sentence and breaks it into words to determine if it is a phrase or a clause. It can also counts the total number of words in a sentence, checks if a word is a palindrome and can generate a new sentence with almost the same meaning using synonyms and other.
. The unification of general relativity and standard model for strong and electro- weak interactions is considered on the base of the conformal.
FQXi catalyzes, supports, and disseminates research on questions at the foundations of physics and cosmology, particularly new frontiers and innovative ideas integral to a deep understanding of reality, but unlikely to be supported by conventional funding sources.
Notes Additional Physical Form: Also available on microfilm from the Library of Congress, photoduplication service. additional physical Form: Electronic reproduction of copy from George A. Smathers Libraries, University of Florida also available.
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