Quantum cosmology

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Quantum field theory
(Feynman diagram)
History of...
Background Field theory Gauge theory Poincaré symmetry Quantum mechanics Spontaneous symmetry breaking
Symmetries Charge conjugation Crossing Parity Time reversal
Tools Anomaly Effective field theory Expectation value Faddeev–Popov ghosts Feynman diagram Lattice gauge theory LSZ reduction formula Partition function Propagator Quantization Renormalization Vacuum state Wick's theorem Wightman axioms
Equations Dirac equation Klein–Gordon equation Proca equations Wheeler–DeWitt equation
Standard Model Electroweak interaction Higgs mechanism Quantum chromodynamics Quantum electrodynamics Yang–Mills theory
Incomplete theories Quantum gravity String theory Supersymmetry Technicolor Theory of everything
Scientists Adler Bethe Bogoliubov Callan Candlin Coleman DeWitt Dirac Dyson Fermi Feynman Fierz Fröhlich Gell-Mann Goldstone Gross 't Hooft Jackiw Klein Landau Lee Lehmann Majorana Nambu Parisi Polyakov Salam Schwinger Skyrme Stueckelberg Symanzik Tomonaga Veltman Weinberg Weisskopf Wilson Witten Yang Yukawa Hoodbhoy Zimmermann Zinn-Justin
v d e

In theoretical physics, quantum cosmology is a field attempting to study the effect of quantum mechanics on the formation of the universe, or its early evolution, especially just after the Big Bang. Despite many attempts, such as the Wheeler-deWitt equation, the field remains a rather speculative branch of quantum gravity. The area with the most current research is loop quantum cosmology, based on loop quantum gravity.

An important problem in this field is the origin of physical information in the universe.

[edit] See also

Minisuperspace

[edit] References

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Quantum gravity

Central concepts

graviton · Planck scale · trans-Planckian problem · quantum foam · AdS/CFT correspondence · IR/UV mixing · causal patch · gravitational anomaly · Weinberg–Witten theorem

Black holes

black hole thermodynamics · black hole information paradox · holographic principle · Bousso's holographic bound · black hole complementarity · gravitational singularity

Quantum field theory
in curved spacetime

Hawking radiation · Unruh radiation · Bunch–Davies vacuum · semiclassical gravity · Casimir effect

Proposed theories

superstring theory	M-theory · supergravity · string field theory · Green-Schwarz mechanism · fuzzball · swampland

canonical quantum gravity	Wheeler–DeWitt equation · loop quantum gravity

Euclidean quantum gravity	Hartle–Hawking state

superfluid vacuum theory	Logarithmic BEC vacuum

others	noncommutative geometry · causal dynamical triangulation · causal sets · twistor theory · spin foam