The
ekpyrotic universe, or
ekpyrotic scenario, is a
cosmological modelPhysical cosmology, as a branch of astronomy, is the study of the largest-scale structures and dynamics of our universe and is concerned with fundamental questions about its formation and evolution. Cosmology involves itself with studying the motions of the celestial bodies and the first cause....
about the origin and
shapeThe shape of the Universe is an informal name for a subject of investigation within physical cosmology which describes the geometry of the universe including both local geometry and global geometry. It is loosely divided into curvature and topology, even though strictly speaking, it goes beyond both...
of the
universeThe Universe comprises everything that physically exists, the entirety of space and time, all forms of matter and energy, and the physical laws and constants that govern them...
. The name comes from a
StoicSTOIC was a variant of Forth.It started out at the MIT and Harvard Biomedical Engineering Centre in Boston, and was written in the mid 1970s by Jonathan Sachs...
term for "out of fire". The ekpyrotic model of the universe is an alternative to the standard
cosmic inflationIn physical cosmology, cosmic inflation, cosmological inflation or just inflation is the theorized exponential expansion of the universe at the end of the grand unification epoch, 10
−36 seconds after the Big Bang, driven by a negative-pressure vacuum energy density...
paradigm, both of which accept that the standard
big bangThe Big Bang is the cosmological model of the initial conditions and subsequent development of the Universe that is supported by the most comprehensive and accurate explanations from current scientific evidence and observation...
Lambda-CDM modelΛCDM or Lambda-CDM is an abbreviation for Lambda-Cold Dark Matter. It is frequently referred to as the concordance model of big bang cosmology, since it attempts to explain cosmic microwave background observations, as well as large scale structure observations and supernovae observations of...
of our universe is an appropriate description up to very early times. The ekpyrotic model is a precursor to, and part of the
cyclic modelA cyclic model is any of several cosmological models in which the universe follows infinite, self-sustaining cycles .-Overview:...
.
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 after it was
submittedPeer review is the process of subjecting an author's scholarly work, research, or ideas to the scrutiny of others who are experts in the same field. Peer review requires a community of experts in a given field, who are qualified and able to perform impartial review...
as a candidate for publication in
Physical ReviewPhysical Review is an American scientific journal, publishing research on all aspects of physics. It is published by the American Physical Society .- History :...
.
- Greene, Brian, The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory
The Elegant Universe is a book by Brian Greene published in 1999 which introduces string theory and provides a comprehensive though non-technical assessment of the theory and some of its shortcomings.-Themes:...
, Vintage (2000).
- Kallosh, Renata, Kofman, Lev and Linde, Andrei, Pyrotechnic Universe (the first paper to point out problems with the theory)
- A Brief Introduction to the Ekpyrotic Universe Steinhardt, Paul J., Department of Physics, Princeton University
- Whitehouse, David, "Before the Big Bang".
Discussion
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The
ekpyrotic universe, or
ekpyrotic scenario, is a
cosmological modelPhysical cosmology, as a branch of astronomy, is the study of the largest-scale structures and dynamics of our universe and is concerned with fundamental questions about its formation and evolution. Cosmology involves itself with studying the motions of the celestial bodies and the first cause....
about the origin and
shapeThe shape of the Universe is an informal name for a subject of investigation within physical cosmology which describes the geometry of the universe including both local geometry and global geometry. It is loosely divided into curvature and topology, even though strictly speaking, it goes beyond both...
of the
universeThe Universe comprises everything that physically exists, the entirety of space and time, all forms of matter and energy, and the physical laws and constants that govern them...
. The name comes from a
StoicSTOIC was a variant of Forth.It started out at the MIT and Harvard Biomedical Engineering Centre in Boston, and was written in the mid 1970s by Jonathan Sachs...
term for "out of fire". The ekpyrotic model of the universe is an alternative to the standard
cosmic inflationIn physical cosmology, cosmic inflation, cosmological inflation or just inflation is the theorized exponential expansion of the universe at the end of the grand unification epoch, 10
−36 seconds after the Big Bang, driven by a negative-pressure vacuum energy density...
paradigm, both of which accept that the standard
big bangThe Big Bang is the cosmological model of the initial conditions and subsequent development of the Universe that is supported by the most comprehensive and accurate explanations from current scientific evidence and observation...
Lambda-CDM modelΛCDM or Lambda-CDM is an abbreviation for Lambda-Cold Dark Matter. It is frequently referred to as the concordance model of big bang cosmology, since it attempts to explain cosmic microwave background observations, as well as large scale structure observations and supernovae observations of...
of our universe is an appropriate description up to very early times. The ekpyrotic model is a precursor to, and part of the
cyclic modelA cyclic model is any of several cosmological models in which the universe follows infinite, self-sustaining cycles .-Overview:...
.
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 after it was
submittedPeer review is the process of subjecting an author's scholarly work, research, or ideas to the scrutiny of others who are experts in the same field. Peer review requires a community of experts in a given field, who are qualified and able to perform impartial review...
as a candidate for publication in
Physical ReviewPhysical Review is an American scientific journal, publishing research on all aspects of physics. It is published by the American Physical Society .- History :...
.
External links
- Greene, Brian, The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory
The Elegant Universe is a book by Brian Greene published in 1999 which introduces string theory and provides a comprehensive though non-technical assessment of the theory and some of its shortcomings.-Themes:...
, Vintage (2000).
- Kallosh, Renata, Kofman, Lev and Linde, Andrei, Pyrotechnic Universe (the first paper to point out problems with the theory)
- A Brief Introduction to the Ekpyrotic Universe Steinhardt, Paul J., Department of Physics, Princeton University
- Whitehouse, David, "Before the Big Bang". BBC
The British Broadcasting Corporation, usually referred to by its abbreviation as the "BBC", is the longest established and largest broadcaster in the world...
News. April 10, 2001.
- Discover Magazine, Before the Big Bang February 2004 issue.
- Simplified Overview Comparing Standard and Ekpyrotic Models of the Universe
- Parallel Universes, (BBC Two 9.00pm Thursday February 14, 2002)