Quantum mechanics

Big Bounce

Big Bang (financial markets)

Theoretical physics

Quantum cosmology

Cosmology

Statistics

Big Rip

Quantum gravity

Scale factor (cosmology)

Hubble volume

Ultimate fate of the universe

Astrophysics

Big Crunch

Economics

Steady State theory

Scale invariance

Metric expansion of space

Dark energy

Physics

Mathematics

Quantum

Flatness problem

Physical cosmology

Finance

De Sitter universe

Hubble's law

Homogeneity (statistics)

Universe

Ekpyrotic universe

Physics Letters B

Combining intervals of ekpyrotic (ultra-slow) contraction with a (non-singular) classical bounce naturally leads to a novel cyclic theory of the universe in which the Hubble parameter, energy density and temperature oscillate periodically, but the scale factor grows by an exponential factor from one cycle to the next. The resulting cosmology not only resolves the homogeneity, isotropy, flatness and monopole problems and generates a nearly scale invariant spectrum of density perturbations, but it also addresses a number of age-old cosmological issues that big bang inflationary cosmology does not. There may also be wider-ranging implications for fundamental physics, black holes and quantum measurement.

A new kind of cyclic universe