Newton–Wigner localization

Newton–Wigner localization (named after Theodore Duddell Newton and Eugene Wigner) is a scheme for obtaining a position operator for massive relativistic quantum particles. It is known to largely conflict with the Reeh-Schlieder theorem outside of a very limited scope. This ensures that the free particle moves at the expected velocity with the given momentum/energy.

Newton–Wigner localization

Newton–Wigner localization (named after Theodore Duddell Newton and Eugene Wigner) is a scheme for obtaining a position operator for massive relativistic quantum particles. It is known to largely conflict with the Reeh-Schlieder theorem outside of a very limited scope. This ensures that the free particle moves at the expected velocity with the given momentum/energy.