S-matrix
UNITARY OPERATOR ON THE FOCK SPACE DESCRIBING SCATTERING AMPLITUDES
S Matrix; S-Matrix; Scattering matrix; Haag-Ruelle scattering theory; S matrix; S-matrices
In physics, the S-matrix or scattering matrix relates the initial state and the final state of a physical system undergoing a scattering process. It is used in quantum mechanics, scattering theory and quantum field theory (QFT).