Coupling Constant - String Theory

String Theory

A remarkably different situation exists in string theory. Each perturbative description of string theory depends on a string coupling constant. However, in the case of string theory, these coupling constants are not pre-determined, adjustable, or universal parameters; rather they are dynamical scalar fields that can depend on the position in space and time and whose values are determined dynamically.

Quantum field theory
Feynman diagram
History
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 Regularization 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 C. D. Anderson P. W. Anderson Bardeen Bethe Bjorken Bogoliubov Brout Cabibbo Callan Cronin DeWitt Dirac Dyson Englert Fermi Feynman Fierz Fisher Fock Fröhlich Gell-Mann Gross Hänsch Heisenberg Higgs Haag 't Hooft Kadanoff Kendall Klitzing Kobayashi Lamb Landau Lee Majorana Maskawa Mills Nambu Nishijima Parisi Paul Polyakov Salam Schwinger Shockley Skyrme Störmer Sudarshan Thomson Tomonaga Veltman Ward Weinberg Wilczek Wilson Yang Yukawa Zeilinger