Who came up with the Ekpyrotic model?
In ekpyrotic cosmology — which was proposed in 2001 by physicists Paul Steinhardt, Justin Khoury, Neil Turok and Burt Ovrut — there is no beginning of time. Instead, our visible universe exists on one of two four-dimensional “branes” floating in a five-dimensional space.
What is the meaning of Ekpyrotic?
ĕkpī-rŏtĭk. Of or relating to a cosmological theory proposing that the known universe originated in the collision of two other three-dimensional universes traveling in a hidden fourth dimension. This scenario does not require a singularity at the moment of the Big Bang.
Who discovered cyclic model?
It was proposed in 2001 by Paul Steinhardt of Princeton University and Neil Turok of Cambridge University.
What would happen if two parallel universes collide?
Such a collision would create perturbations in the fabric of spacetime which would leave an imprint on the cosmic microwave background radiation. The background radiation is the universe’s first light, made up of photons that were released throughout the universe a mere 370,000 years after the big bang.
Is the universe cyclical?
The cyclic universe theory is a model of cosmic evolution according to which the universe undergoes endless cycles of expansion and cooling, each beginning with a “big bang” and ending in a “big crunch”.
What is cyclic universe theory?
Which is the best description of the ekpyrotic universe?
The ekpyrotic universe ( / ˌɛkpaɪˈrɒtɪk /) is a cosmological model of the early universe that explains the origin of the large-scale structure of the cosmos. The model has also been incorporated in the cyclic universe theory (or ekpyrotic cyclic universe theory), which proposes a complete cosmological history, both the past and future.
How does the ekpyrotic theory relate to the Big Bang?
The original ekpyrotic models relied on string theory, branes and extra dimensions, but most contemporary ekpyrotic and cyclic models use the same physical ingredients as inflationary models (quantum fields evolving in ordinary space-time). Like Big Bang cosmology, the ekpyrotic theory has accurately described essential features of our universe.
Why do ekpyrotic and cyclic models not produce a multiverse?
In ekpyrotic and cyclic models, smoothing and flattening occurs during a period of slow contraction, so quantum fluctuations are not inflated and cannot produce a multiverse. As a result, the ekpyrotic and cyclic models predict simple physical properties that are consistent with current experimental evidence without producing a multiverse.
What does ekpyrosis mean in Stoic cosmology?
In Stoic philosophy, ekpyrosis, all-engulfing cosmic fire, represents the contractive phase of eternally-recurring destruction and re-creation. On “ekpyrosis” see generally Michael Lapidge, ‘Stoic Cosmology,’ in John M. Rist, The Stoics, Cambridge University Press, 1978, pp. 161–186, pp. 180–184.