Section MP2

• Sets up the MP2 parameters if requested

• Section path: CP2K_INPUT / FORCE_EVAL / DFT / TDDFPT / XC / MP2

• This section can be repeated and cannot be optional.

• Subsections

  • DIRECT_CANONICAL
  • INTERACTION_POTENTIAL
  • MP2_GPW
  • MP2_INFO

• Keywords

  • GROUP_SIZE
  • MEMORY
  • METHOD
  • SCALE_S
  • SCALE_T

• Keyword descriptions

  GROUP_SIZE
  	GROUP_SIZE 32
  	Group size used in the computation of the integrals. Default is to use all processors (GROUP_SIZE=-1).A smaller group size (for example the node size), might a better choice if the actual MP2 time is large compared to integral computation time. This is usually the case if the total number of processors is not too large.
  	This optional keyword cannot be repeated and it expects precisely one integer.
  	Default value: -1
  	Alias names for this keyword: NUMBER_PROC

  MEMORY
  	MEMORY 1500
  	Maximum allowed total memory usage during MP2 methods [Mb].
  	This optional keyword cannot be repeated and it expects precisely one real.
  	Default value: 1.02400000E+03

  METHOD
  	METHOD MP2_GPW
  	Which method should be used to compute the MP2 energy
  	This optional keyword cannot be repeated and it expects precisely one keyword.
  	Default value: DIRECT_CANONICAL
  	List of valid keywords: DIRECT_CANONICAL Use the direct mp2 canonical approach MP2_GPW Use the GPW approach to MP2 NONE Skip MP2 calculation

  SCALE_S
  	SCALE_S 1.0
  	Scaling factor of the singlet energy component (opposite spin, OS).
  	This optional keyword cannot be repeated and it expects precisely one real.
  	Default value: 1.00000000E+00

  SCALE_T
  	SCALE_T 1.0
  	Scaling factor of the triplet energy component (same spin, SS).
  	This optional keyword cannot be repeated and it expects precisely one real.
  	Default value: 1.00000000E+00