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mirror of https://github.com/QuantumPackage/qp2.git synced 2024-06-16 17:45:17 +02:00

Added ao_one_e_ints_periodic

This commit is contained in:
Anthony Scemama 2019-12-02 16:20:11 +01:00
parent 2f3ce3d59a
commit 6d064b9bf0
10 changed files with 333 additions and 0 deletions

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[ao_integrals_e_n]
type: double precision
doc: Nucleus-electron integrals in |AO| basis set
size: (ao_basis.ao_num,ao_basis.ao_num)
interface: ezfio
[io_ao_integrals_e_n]
type: Disk_access
doc: Read/Write |AO| nucleus-electron attraction integrals from/to disk [ Write | Read | None ]
interface: ezfio,provider,ocaml
default: None
[ao_integrals_kinetic]
type: double precision
doc: Kinetic energy integrals in |AO| basis set
size: (ao_basis.ao_num,ao_basis.ao_num)
interface: ezfio
[io_ao_integrals_kinetic]
type: Disk_access
doc: Read/Write |AO| kinetic integrals from/to disk [ Write | Read | None ]
interface: ezfio,provider,ocaml
default: None
[ao_integrals_pseudo]
type: double precision
doc: Pseudopotential integrals in |AO| basis set
size: (ao_basis.ao_num,ao_basis.ao_num)
interface: ezfio
[io_ao_integrals_pseudo]
type: Disk_access
doc: Read/Write |AO| pseudopotential integrals from/to disk [ Write | Read | None ]
interface: ezfio,provider,ocaml
default: None
[ao_integrals_overlap]
type: double precision
doc: Overlap integrals in |AO| basis set
size: (ao_basis.ao_num,ao_basis.ao_num)
interface: ezfio
[io_ao_integrals_overlap]
type: Disk_access
doc: Read/Write |AO| overlap integrals from/to disk [ Write | Read | None ]
interface: ezfio,provider,ocaml
default: None
[ao_one_e_integrals]
type: double precision
doc: Combined integrals in |AO| basis set
size: (ao_basis.ao_num,ao_basis.ao_num)
interface: ezfio
[io_ao_one_e_integrals]
type: Disk_access
doc: Read/Write |AO| one-electron integrals from/to disk [ Write | Read | None ]
interface: ezfio,provider,ocaml
default: Read
[num_kpts]
type: integer
doc: Number of k-points
interface: ezfio,provider,ocaml
default: 1

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ao_basis
pseudo

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==================
ao_one_e_integrals
==================
All the one-electron integrals in the periodic |AO| basis are here.
Warning: this is incompatible with non-periodic |AOs|.
The most important providers for usual quantum-chemistry calculation are:
* `ao_kinetic_integrals` which are the kinetic operator integrals on the |AO| basis
* `ao_integrals_n_e` which are the nuclear-elctron operator integrals on the |AO| basis
* `ao_one_e_integrals` which are the the h_core operator integrals on the |AO| basis

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BEGIN_PROVIDER [ complex*16, ao_one_e_integrals,(ao_num,ao_num)]
&BEGIN_PROVIDER [ double precision, ao_one_e_integrals_diag,(ao_num)]
implicit none
integer :: i,j,n,l
BEGIN_DOC
! One-electron Hamiltonian in the |AO| basis.
END_DOC
IF (read_ao_one_e_integrals) THEN
call ezfio_get_ao_one_e_ints_ao_one_e_integrals(ao_one_e_integrals)
ELSE
ao_one_e_integrals = ao_integrals_n_e + ao_kinetic_integrals
IF (DO_PSEUDO) THEN
ao_one_e_integrals += ao_pseudo_integrals
ENDIF
ENDIF
DO j = 1, ao_num
ao_one_e_integrals_diag(j) = real(ao_one_e_integrals(j,j))
ENDDO
IF (write_ao_one_e_integrals) THEN
call ezfio_set_ao_one_e_ints_ao_one_e_integrals(ao_one_e_integrals)
print *, 'AO one-e integrals written to disk'
ENDIF
END_PROVIDER

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BEGIN_PROVIDER [ complex*16, ao_overlap,(ao_num,ao_num) ]
implicit none
BEGIN_DOC
! Overlap between atomic basis functions:
! :math:`\int \chi_i(r) \chi_j(r) dr)`
END_DOC
if (read_ao_integrals_overlap) then
call read_one_e_integrals_complex('ao_overlap', ao_overlap,&
size(ao_overlap,1), size(ao_overlap,2))
print *, 'AO overlap integrals read from disk'
else
print *, 'complex AO overlap integrals must be provided'
endif
END_PROVIDER
BEGIN_PROVIDER [ double precision, ao_overlap_abs,(ao_num,ao_num) ]
implicit none
BEGIN_DOC
! Overlap between absolute value of atomic basis functions:
! :math:`\int |\chi_i(r)| |\chi_j(r)| dr)`
END_DOC
integer :: i,j
!$OMP PARALLEL DO SCHEDULE(GUIDED) &
!$OMP DEFAULT(NONE) &
!$OMP PRIVATE(i,j) &
!$OMP SHARED(ao_overlap_abs,ao_overlap,ao_num)
do j=1,ao_num
do i= 1,ao_num
ao_overlap_abs(i,j)= cdabs(ao_overlap(i,j))
enddo
enddo
!$OMP END PARALLEL DO
END_PROVIDER
BEGIN_PROVIDER [ complex*16, S_inv,(ao_num,ao_num) ]
implicit none
BEGIN_DOC
! Inverse of the overlap matrix
END_DOC
call get_pseudo_inverse_complex(ao_overlap,size(ao_overlap,1),ao_num,ao_num,S_inv,size(S_inv,1))
END_PROVIDER
BEGIN_PROVIDER [ complex*16, S_half_inv, (AO_num,AO_num) ]
BEGIN_DOC
! :math:`X = S^{-1/2}` obtained by SVD
END_DOC
implicit none
integer :: num_linear_dependencies
integer :: LDA, LDC
double precision, allocatable :: D(:)
complex*16, allocatable :: U(:,:),Vt(:,:)
integer :: info, i, j, k
double precision, parameter :: threshold_overlap_AO_eigenvalues = 1.d-6
LDA = size(AO_overlap,1)
LDC = size(S_half_inv,1)
allocate( &
U(LDC,AO_num), &
Vt(LDA,AO_num), &
D(AO_num))
call svd_complex( &
AO_overlap,LDA, &
U,LDC, &
D, &
Vt,LDA, &
AO_num,AO_num)
num_linear_dependencies = 0
do i=1,AO_num
print*,D(i)
if(abs(D(i)) <= threshold_overlap_AO_eigenvalues) then
D(i) = 0.d0
num_linear_dependencies += 1
else
ASSERT (D(i) > 0.d0)
D(i) = 1.d0/sqrt(D(i))
endif
do j=1,AO_num
S_half_inv(j,i) = (0.d0,0.d0)
enddo
enddo
write(*,*) 'linear dependencies',num_linear_dependencies
do k=1,AO_num
if(D(k) /= 0.d0) then
do j=1,AO_num
do i=1,AO_num
S_half_inv(i,j) = S_half_inv(i,j) + U(i,k)*D(k)*Vt(k,j)
enddo
enddo
endif
enddo
END_PROVIDER
BEGIN_PROVIDER [ complex*16, S_half, (ao_num,ao_num) ]
implicit none
BEGIN_DOC
! :math:`S^{1/2}`
END_DOC
integer :: i,j,k
complex*16, allocatable :: U(:,:)
complex*16, allocatable :: Vt(:,:)
double precision, allocatable :: D(:)
allocate(U(ao_num,ao_num),Vt(ao_num,ao_num),D(ao_num))
call svd_complex(ao_overlap,size(ao_overlap,1),U,size(U,1),D,Vt,size(Vt,1),ao_num,ao_num)
do i=1,ao_num
D(i) = dsqrt(D(i))
do j=1,ao_num
S_half(j,i) = (0.d0,0.d0)
enddo
enddo
do k=1,ao_num
do j=1,ao_num
do i=1,ao_num
S_half(i,j) = S_half(i,j) + U(i,k)*D(k)*Vt(k,j)
enddo
enddo
enddo
deallocate(U,Vt,D)
END_PROVIDER

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BEGIN_PROVIDER [integer, ao_num_per_kpt ]
implicit none
ao_num_per_kpt = ao_num / num_kpts
END_PROVIDER

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BEGIN_PROVIDER [complex*16, ao_kinetic_integrals, (ao_num,ao_num)]
implicit none
BEGIN_DOC
! array of the priminitve basis kinetic integrals
! \langle \chi_i |\hat{T}| \chi_j \rangle
END_DOC
if (read_ao_integrals_kinetic) then
call read_one_e_integrals_complex('ao_kinetic_integrals', ao_kinetic_integrals,&
size(ao_kinetic_integrals,1), size(ao_kinetic_integrals,2))
print *, 'AO kinetic integrals read from disk'
else
print *, 'complex AO kinetic integrals must be provided'
stop
endif
END_PROVIDER

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BEGIN_PROVIDER [ complex*16, ao_integrals_n_e, (ao_num,ao_num)]
BEGIN_DOC
! Nucleus-electron interaction, in the |AO| basis set.
!
! :math:`\langle \chi_i | -\sum_A \frac{1}{|r-R_A|} | \chi_j \rangle`
END_DOC
if (read_ao_integrals_e_n) then
call read_one_e_integrals_complex('ao_ne_integral', ao_integrals_n_e, &
size(ao_integrals_n_e,1), size(ao_integrals_n_e,2))
print *, 'AO N-e integrals read from disk'
else
print *, 'complex AO N-e integrals must be provided'
stop
endif
END_PROVIDER
BEGIN_PROVIDER [ double precision, ao_integrals_n_e_per_atom, (ao_num,ao_num,nucl_num)]
BEGIN_DOC
! Nucleus-electron interaction in the |AO| basis set, per atom A.
!
! :math:`\langle \chi_i | -\frac{1}{|r-R_A|} | \chi_j \rangle`
END_DOC
print *, 'ao_nucl_elec_integral_per_atom not implemented for k-points'
stop
END_PROVIDER

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BEGIN_PROVIDER [ double precision, ao_pseudo_integrals, (ao_num,ao_num)]
implicit none
BEGIN_DOC
! Pseudo-potential integrals in the |AO| basis set.
END_DOC
if (read_ao_integrals_pseudo) then
call ezfio_get_ao_one_e_ints_ao_integrals_pseudo(ao_pseudo_integrals)
print *, 'AO pseudopotential integrals read from disk'
else
if (do_pseudo) then
print *, irp_here, 'Not yet implemented'
stop -1
endif
endif
if (write_ao_integrals_pseudo) then
call ezfio_set_ao_one_e_ints_ao_integrals_pseudo(ao_pseudo_integrals)
print *, 'AO pseudopotential integrals written to disk'
endif
END_PROVIDER

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program test
print *, ' hello'
end