Quantum Field Theory joins ideas from quantum theory and special relativity. There are multiple field theories that apply to different forces:
| Theory | Force |
|---|---|
| QED: Quantum Electrodynamics | Electromagnetic force |
| QCD: Quantum Chromodynamics | Strong nuclear force |
| Electroweak Theory | Weak nuclear force |
There is yet to be found a quantum theory of gravity. A good overview over attempts made to unify physical theories is provided by the cGh cube, seen in the diagram below:
stateDiagram
SR: Special Relativity
QFT: Quantum Field Theory
TOE: Theory Of Everything
QM: Quantum Mechanics
NRQG: Non-Relativistic Quantum Gravity
CM: Classical Mechanics
G: Gravitation
GR: General Relativity
CM --> G : Gravity
QM --> NRQG : Gravity
QFT --> TOE : Gravity
SR --> GR : Gravity
CM --> QM : Spoky action
G --> NRQG : Spoky action
SR --> QFT : Spoky action
GR --> TOE : Spoky action
CM --> SR : Space-time curvature
QM --> QFT : Space-time curvature
G --> GR : Space-time curvature
NRQG --> TOE : Space-time curvature