Comment on phase-space representation of quantum state vectors

A simple approach to phase-space representation of quantum state vectors us ing the displacement-operator formalism is presented. Although the resultin g expressions for the fundamental operators (position and momentum) are equ ivalent to those obtained by other methods, this approach provides both alt ernative mathematical foundation as well as physical interpretation of phas e-space representation of quantum state vectors. (C) 1999 American Institut e of Physics. [S0022-2488(99)01605-9].