Electron Momentum Densities

For detailed accounts of Electron Momentum Densities check the works of Professor Shridhar R. Gadre, Professor Ajit J. Thakkar, Dr. Rajeev K. Pathak, the late Professor Vedene H. Smith, Jr. , Professor Ernest R. Davidson 

The electron momentum density for antisymmetric N particle fermionic wavefunction is defined by the following equation (the summation over the spins being implicit):