Ekpyrotic

Ekpyrotic

The ekpyrotic universe, or ekpyrotic scenario, is a cosmological model about the origin and shape of the universe. The name comes from a Stoic term for "out of fire". [In Stoic philosophy, "ekpyrosis", all-engulfing cosmic fire, represents the contractive phase of eternally-recurring destruction and re-creation.] The ekpyrotic model of the universe is an alternative to the standard cosmic inflation paradigm, both of which accept that the standard big bang Lambda-CDM model of our universe is an appropriate description up to very early times. The ekpyrotic model is a precursor to, and part of the cyclic model.

The ekpyrotic model received recent attention from cosmologists, and has been discussed in a number of articles that suggest it as an alternative to the Big Bang theory [ [http://www.space.com/scienceastronomy/astronomy/bigbang_alternative_010413-1.html Brane-Storm' Challenges Part of Big Bang Theory] ] [ [http://msnbc.msn.com/id/3077357/ Questioning the Big Bang] , MSNBC] [ [http://archives.cnn.com/2001/TECH/space/04/13/big.bang.collision/ Report: Universe began by colliding with another] , CNN] [ [http://news.bbc.co.uk/1/hi/sci/tech/1270726.stm Before the Big Bang] , BBC] after it was submitted as a candidate for publication in "Physical Review". [cite journal
last = Khoury
first = Justin
authorlink =
coauthors = Burt A. Ovrut, Paul J. Steinhardt, Neil Turok
title = Ekpyrotic universe: Colliding branes and the origin of the hot big bang
journal = Phys. Rev. D
volume = 64
issue = 12
pages = 123522
publisher = American Physical Society
location =
date = November 28, 2001
url = http://prola.aps.org/abstract/PRD/v64/i12/e123522
doi = 10.1103/PhysRevD.64.123522
id =
accessdate = ]

Notes and references

ee also

*cosmic inflation
*cyclic model

External links

* Greene, Brian, , Vintage (2000).
* Kallosh, Renata, Kofman, Lev and Linde, Andrei, [http://xxx.soton.ac.uk/abs/hep-th/0104073 Pyrotechnic Universe] (the first paper to point out problems with the theory)
* [http://wwwphy.princeton.edu/~steinh/npr A Brief Introduction to the Ekpyrotic Universe] Steinhardt, Paul J., Department of Physics, Princeton University
* Whitehouse, David, " [http://news.bbc.co.uk/1/hi/sci/tech/1270726.stm Before the Big Bang] ". BBC News. April 10, 2001.
*Discover Magazine, [http://www.discover.com/issues/feb-04/cover/?page=1 Before the Big Bang] February 2004 issue.
* [http://www.historyincontext.com/Articles/Cosmology/1-BeforeBigBang.htm Simplified Overview Comparing Standard and Ekpyrotic Models of the Universe]
* [http://www.bbc.co.uk/science/horizon/2001/parallelunitrans.shtml Parallel Universes, (BBC Two 9.00pm Thursday February 14, 2002)]


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