Quantum cosmology

Quantum cosmology is the attempt in theoretical physics to develop a quantum theory of the Universe. This approach attempts to answer open questions of classical physical cosmology, particularly those related to the first phases of the universe.

Quantum field theory
Feynman diagram
History
Background Field theory Electromagnetism Weak force Strong force Quantum mechanics Special relativity General relativity Gauge theory
Symmetries Symmetry in quantum mechanics C-symmetry P-symmetry T-symmetry Space translation symmetry Time translation symmetry Rotation symmetry Lorentz symmetry Poincaré symmetry Gauge symmetry Explicit symmetry breaking Spontaneous symmetry breaking Yang–Mills theory Noether charge Topological charge
Tools Anomaly Crossing Effective field theory Expectation value Ghost fields Faddeev–Popov ghosts Feynman diagram Lattice gauge theory LSZ reduction formula Partition function Propagator Quantization Regularization Renormalization Vacuum state Wick's theorem Wightman axioms Feynman parametrization
Equations Dirac equation Klein–Gordon equation Proca equations Wheeler–DeWitt equation Bargmann–Wigner equations Joos–Weinberg equation Weyl equation
Standard Model Quantum electrodynamics Electroweak interaction Quantum chromodynamics Higgs mechanism
Incomplete theories Topological quantum field theory String theory Superstring theory M-Theory Supersymmetry Supergravity Technicolor Theory of everything Quantum gravity
Scientists Adler Anderson Bethe Bogoliubov Coleman Callan DeWitt Dirac Dyson Fermi Feynman Fierz Fock Fröhlich Gell-Mann Goldstone Gross Heisenberg 't Hooft Jackiw Jordan Landau Lee Lehmann Mandelstam Majorana Nambu Parisi Polyakov Salam Schwinger Skyrme Stueckelberg Symanzik Tomonaga Veltman Weinberg Weisskopf Weyl Wilczek Wilson Witten Yang Yukawa Zimmermann Zinn-Justin

The classical cosmology is based on Albert Einstein's general theory of relativity (GTR or simply GR) which describes the evolution of the universe very well, as long as you do not approach the Big Bang. It is the gravitational singularity and the Planck time where relativity theory fails to provide what must be demanded of a final theory of space and time. Therefore, a theory is needed that integrates relativity theory and quantum theory.[1] Such an approach is attempted for instance with the loop quantum gravity, the string theory and the causal set theory.[2]