- Imaginary unit
- Planck's constant divided by [Value: 1.051 × 10-34 m2 kg s-1]
- The speed of light [Value: 3 × 108 m s-1]
- Dirac matrices
- Rest mass of the electron [Value: 0.511 MeV / c2]
- Wavefunction of the system - the probability amplitude for different configurations of the system at different times. Also known as the quantum state, this is the most complete description that can be given to a physical system.
What Does It Mean?
The Dirac Equation is a relativistic quantum mechanical wave equation which provides a description of spin-1/2 particles, such as electrons, consistent with quantum mechanics and special relativity. This equation predicts the existence of antiparticles and predates their actual experimental discovery.
Further information at Warwick