LFOCKACE = .TRUE. | .FALSE.
Default: LFOCKACE = .TRUE.
|Default: LFOCKACE||= .TRUE.||for VASP.6|
|= N/A||for VASP.5.X and older|
- N.B.:Available for CPU and OpenACC version of VASP.6 when compiled with -Dfock_dblbuf.
For LFOCKACE=.TRUE. the Cholesky decomposition of the Fock exchange matrix is calculated and the adaptively compressed exchange operator is used for the action of the Fock exchange on the pseudo orbitals. This method can be used for hybrid functionals in combination with the Davidson algorithm (ALGO=Normal) to save a factor of in computation time.
For LFOCKACE=.TRUE. the conventional orbital representation is used.