CFOUR_GAMMA_ABCD

Used to control the handling and storage of two-particle density matrix elements with four virtual indices Γ(abcd). DISK (=0) directs the program to calculate and store all elements of Γ(abcd), while DIRECT (=1) tells the program to use alternative algorithms in which Γ(abcd) is calculated and used “on the fly”. Note that this option might be not available for all type of calculations.

  • Type: string

  • Possible Values: DISK, DIRECT

  • Default: DISK