Section RI_RPA

• Parameters influencing the RI RPA method

• Section path: CP2K_INPUT / ATOM / METHOD / XC / WF_CORRELATION / RI_RPA

• This section cannot be repeated.

• This section cites the following references: [DelBen2013] [DelBen2015]

• Subsections

  • HF
  • IM_TIME
  • RI_AXK
  • RI_G0W0

• Keywords

  • ADMM
  • IM_TIME
  • MINIMAX_QUADRATURE
  • MM_STYLE
  • QUADRATURE_POINTS
  • RI_AXK
  • RI_G0W0
  • SIZE_FREQ_INTEG_GROUP

• Keyword descriptions

  ADMM
  	ADMM {Logical}
  	Decide whether to perform ADMM in the exact exchange calc. for RPA and/or GW. Not really recommended. In most cases, the Hartree-Fock exchange is not expensive and there is no need for ADMM. Only in case of diffuse functions for periodic systems (only reasonable for GW bandgap calculations) exact exchange can be expensive and then, we recommend using RI for exchange.
  	This keyword cannot be repeated and it expects precisely one logical.
  	The lone keyword behaves as a switch to .TRUE.
  	Default value: .FALSE.

  IM_TIME
  	IM_TIME {Logical}
  	Decide whether to calculate Q-matrix for imaginary time.
  	This keyword cannot be repeated and it expects precisely one logical.
  	The lone keyword behaves as a switch to .TRUE.
  	Default value: .FALSE.
  	Alias names for this keyword: IMAG_TIME

  MINIMAX_QUADRATURE
  	MINIMAX_QUADRATURE {Logical}
  	Use the Minimax quadrature scheme for performing the numerical integration. Maximum number of quadrature point limited to 20.
  	This keyword cannot be repeated and it expects precisely one logical.
  	The lone keyword behaves as a switch to .TRUE.
  	Default value: .FALSE.
  	Alias names for this keyword: MINIMAX

  MM_STYLE
  	MM_STYLE {Keyword}
  	Matrix multiplication style for the Q matrix.
  	This keyword cannot be repeated and it expects precisely one keyword.
  	Default value: GEMM
  	List of valid keywords: GEMM Use pdgemm: more flops, maybe faster. SYRK Use pdysrk: fewer flops, maybe slower.

  QUADRATURE_POINTS
  	QUADRATURE_POINTS {Integer}
  	Number of quadrature points for the numerical integration in the RI-RPA method.
  	This keyword cannot be repeated and it expects precisely one integer.
  	Default value: 40
  	Alias names for this keyword: RPA_NUM_QUAD_POINTS

  RI_AXK
  	RI_AXK {Logical}
  	Decide whether to perform an RPA-AXK calculation.
  	This keyword cannot be repeated and it expects precisely one logical.
  	The lone keyword behaves as a switch to .TRUE.
  	Default value: .FALSE.
  	Alias names for this keyword: AXK

  RI_G0W0
  	RI_G0W0 {Logical}
  	Decide whether to perform an RI_G0W0 calculation on top of RI_RPA. For cubic-scaling GW, please use IM_TIME_GW.
  	This keyword cannot be repeated and it expects precisely one logical.
  	The lone keyword behaves as a switch to .TRUE.
  	Default value: .FALSE.
  	Alias names for this keyword: GW

  SIZE_FREQ_INTEG_GROUP
  	SIZE_FREQ_INTEG_GROUP {Integer}
  	Group size for frequency integration, that is the number of processes involved in the computation of each integration point. SIZE_FREQ_INTEG_GROUP has to be a multiple of GROUP_SIZE in the WF_CORRELATION section. The default (-1) is automatic.
  	This keyword cannot be repeated and it expects precisely one integer.
  	Default value: -1
  	Alias names for this keyword: RPA_GROUP_SIZE