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
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  • Englert
  • Fermi
  • Feynman
  • Fierz
  • Fisher
  • Fock
  • Fröhlich
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  • Haag
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  • Lamb
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  • Lee
  • Majorana
  • Maskawa
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  • Thomson
  • Tomonaga
  • Veltman
  • Ward
  • Weinberg
  • Wilczek
  • Wilson
  • Yang
  • Yukawa
  • Zeilinger

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