4‐Currents in relativistic quantum chemistry

AbstractSome topics in relativistic quantum chemistry are reviewed with special emphasis on 4‐currents and 4‐potentials. It is shown that, both in molecular quantum theory and in solid‐state physics, calculations can include relativistic and magnetic effects by means of 4‐currents without an excessive increase in complication, provided that 4‐component Dirac spinors are used rather than the Pauli approximation. © 1993 John Wiley & Sons, Inc.