PsiRASCI is a general (RAS) CI PsiWavefunction. More...

#include <chemistry/qc/psi/psici.h>

Inheritance diagram for sc::PsiRASCI:

Public Member Functions
	PsiRASCI (const Ref< KeyVal > &keyval)
	A KeyVal constructor is used to generate a PsiRASCI object from the input. More...

	PsiRASCI (StateIn &s)

void	save_data_state (StateOut &s)
	Save the base classes (with save_data_state) and the members in the same order that the StateIn CTOR initializes them. More...

void	compute ()
	Recompute at least the results that have compute true and are not already computed. More...

void	print (std::ostream &) const
	Print information about the object.

double	magnetic_moment () const
	Computes the S (or J) magnetic moment of the target state(s), in units of $\hbar/2$ . More...

const std::vector< unsigned int > &	ras1 () const
	returns vector that specifies the number of RAS1 orbitals in each irrep

const std::vector< unsigned int > &	ras2 () const
	returns vector that specifies the number of RAS2 orbitals in each irrep

const std::vector< unsigned int > &	ras3 () const
	returns vector that specifies the number of RAS3 orbitals in each irrep

unsigned int	ras3_max () const
	returns the maximum number of electrons allowed in RAS3 space

RefSymmSCMatrix	mo_density (SpinCase1 spin)

const Ref< OrbitalSpace > &	orbs_sb (SpinCase1 spin)
	if this is PsiRASSCF this will return RASSCF orbitals

const Ref< OrbitalSpace > &	occ (SpinCase1 spin)
	returns occupied OrbitalSpace. More...

RefSymmSCMatrix	onepdm_occ (SpinCase1 spin)
	1-pdm in the space reported by occ()

RefSymmSCMatrix	twopdm_occ (SpinCase2 spin)
	2-pdm in the space reported by occ()

RefSymmSCMatrix	twopdm_occ ()
	spin-free 2-pdm in the space reported by occ()

Public Member Functions inherited from sc::PsiCorrWavefunction
	PsiCorrWavefunction (const Ref< KeyVal > &)
	A KeyVal constructor is used to generate a PsiCorrWavefunction object from the input. More...

	PsiCorrWavefunction (StateIn &)

void	save_data_state (StateOut &)
	Save the base classes (with save_data_state) and the members in the same order that the StateIn CTOR initializes them. More...

void	print (std::ostream &os) const
	Print information about the object.

double	magnetic_moment () const
	Computes the S (or J) magnetic moment of the target state(s), in units of $\hbar/2$ . More...

void	set_desired_value_accuracy (double acc)
	sets the desired value accuracy

void	compute ()
	Recompute at least the results that have compute true and are not already computed. More...

void	obsolete ()
	Marks all results as being out of date. More...

void	symmetry_changed ()
	Call this if you have changed the molecular symmetry of the molecule contained by this MolecularEnergy.

RefSymmSCMatrix	density ()
	reimplementation of PsiWavefunction::density()

const Ref< PsiSCF > &	reference () const

int	nelectron ()
	Number of electrons.

unsigned int	nfzc () const
	total # of frozen doubly-occupied orbitals

unsigned int	nfzv () const
	total # of frozen unoccupied orbitals

const std::vector< unsigned int > &	frozen_docc () const

const std::vector< unsigned int > &	frozen_uocc () const

const std::vector< unsigned int >	docc_act ()

const std::vector< unsigned int >	socc ()

const std::vector< unsigned int >	uocc_act ()

const std::vector< unsigned int >	docc ()

const std::vector< unsigned int >	uocc ()

virtual double	reference_energy ()
	reference energy

RefSymmSCMatrix	mo_density (SpinCase1 spin)
	return one-particel density matrix in symmetry-blocked orbitals More...

RefSymmSCMatrix	twopdm_dirac (const SpinCase2 &pairspin)
	produces 2-RDM for spin case `pairspin`

RefSymmSCMatrix	twopdm_dirac ()
	produces spin-free 2-RDM

void	print_onepdm_vec (FILE *output, const RefSCVector &opdm, double TOL)

void	print_onepdm_mat (FILE *output, const RefSymmSCMatrix &opdm, double TOL)

void	print_twopdm_mat (FILE *output, const RefSymmSCMatrix &tpdm, double TOL)

void	print_twopdm_arr (FILE output, double tpdm, double TOL)

Public Member Functions inherited from sc::PsiWavefunction
	PsiWavefunction (const Ref< KeyVal > &)
	The KeyVal constructor. More...

	PsiWavefunction (StateIn &)

virtual void	write_basic_input (int conv)
	Writes out Psi input file entries specific to this PsiWavefunction. More...

int	nirrep () const

Ref< PsiExEnv >	exenv () const
	Return an associated PsiExEnv object.

Ref< PsiInput >	get_psi_input () const
	Return an associated PsiInput object.

double	nuclear_repulsion_energy ()
	return Psi3 nuclear repulsion energy

Public Member Functions inherited from sc::Wavefunction
	Wavefunction (StateIn &)

	Wavefunction (const Ref< KeyVal > &)
	The KeyVal constructor. More...

void	save_data_state (StateOut &)
	Save the base classes (with save_data_state) and the members in the same order that the StateIn CTOR initializes them. More...

double	density (const SCVector3 &)

double	density_gradient (const SCVector3 &, double *)

double	natural_orbital (const SCVector3 &r, int iorb)

double	natural_orbital_density (const SCVector3 &r, int orb, double *orbval=0)

double	orbital (const SCVector3 &r, int iorb, const RefSCMatrix &orbs)

void	orbitals (const SCVector3 &r, const RefSCMatrix &orbs, RefSCVector &values)

double	orbital_density (const SCVector3 &r, int iorb, const RefSCMatrix &orbs, double *orbval=0)

double	total_charge () const
	Returns the total charge of the system.

virtual RefSymmSCMatrix	ao_density ()
	Returns the AO density.

virtual RefSCMatrix	natural_orbitals ()
	Returns the natural orbitals, in SO basis.

virtual RefDiagSCMatrix	natural_density ()
	Returns the natural density (a diagonal matrix).

int	spin_polarized ()
	Return 1 if the magnetic moment != 0.

int	dk () const
	Returns the level the of the Douglas-Kroll approximation.

virtual RefSymmSCMatrix	alpha_density ()
	Return alpha electron densities in the SO basis.

virtual RefSymmSCMatrix	beta_density ()
	Return beta electron densities in the SO basis.

virtual RefSymmSCMatrix	alpha_ao_density ()
	Return alpha electron densities in the AO basis.

virtual RefSymmSCMatrix	beta_ao_density ()
	Return beta electron densities in the AO basis.

virtual RefSCMatrix	nao (double *atom_charges=0)
	returns the ao to nao transformation matrix

virtual RefSymmSCMatrix	overlap ()
	Returns the SO overlap matrix.

virtual RefSymmSCMatrix	core_hamiltonian_for_basis (const Ref< GaussianBasisSet > &bas, const Ref< GaussianBasisSet > &pbas=0)
	Returns the SO core Hamiltonian in the given basis and momentum basis. More...

virtual RefSymmSCMatrix	core_hamiltonian ()
	Returns the SO core Hamiltonian.

RefSymmSCMatrix	core_hamiltonian_nr (const Ref< GaussianBasisSet > &bas)

void	nuclear_repulsion_energy_gradient (double *g)
	Computes the nuclear repulsion gradient. More...

virtual void	nuclear_repulsion_energy_gradient (double **g)
	Computes the nuclear repulsion gradient. More...

RefSCDimension	ao_dimension ()
	Atomic orbital dimension.

RefSCDimension	so_dimension ()
	Symmetry adapted orbital dimension.

RefSCDimension	oso_dimension ()
	Orthogonalized symmetry adapted orbital dimension.

Ref< SCMatrixKit >	basis_matrixkit ()
	Matrix kit for AO, SO, orthogonalized SO, and MO dimensioned matrices.

Ref< Molecule >	molecule () const
	Returns the Molecule.

Ref< GaussianBasisSet >	basis () const
	Returns the basis set.

Ref< GaussianBasisSet >	momentum_basis () const
	Returns the basis used for p^2 in the DK correction.

Ref< GaussianBasisSet >	atom_basis () const
	Returns the basis set describing the nuclear charge distributions.

const double *	atom_basis_coef () const
	Returns the coefficients of the nuclear charge distribution basis functions.

Ref< Integral >	integral ()
	Returns the integral evaluator.

void	symmetry_changed ()
	Call this if you have changed the molecular symmetry of the molecule contained by this MolecularEnergy.

RefSCMatrix	so_to_orthog_so ()
	Returns a matrix which does the default transform from SO's to orthogonal SO's. More...

RefSCMatrix	so_to_orthog_so_inverse ()
	Returns the inverse of the transformation returned by so_to_orthog_so.

OverlapOrthog::OrthogMethod	orthog_method () const
	Returns the orthogonalization method.

virtual void	set_orthog_method (const OverlapOrthog::OrthogMethod &)
	(Re)Sets the orthogonalization method and makes this obsolete. More...

double	lindep_tol () const
	Returns the tolerance for linear dependencies.

void	set_lindep_tol (double)
	Re(Sets) the tolerance for linear dependencies.

void	obsolete ()
	Marks all results as being out of date. More...

void	print (std::ostream &=ExEnv::out0()) const
	Print information about the object.

void	writeorbitals ()
	output orbitals to some files to facilitate plotting, with the help of the WriteOrbital class.

Public Member Functions inherited from sc::MolecularEnergy
	MolecularEnergy (const MolecularEnergy &)

	MolecularEnergy (const Ref< KeyVal > &)
	The KeyVal constructor. More...

	MolecularEnergy (StateIn &)

void	set_checkpoint ()
	Set up checkpointing.

void	set_checkpoint_file (const char *)

void	set_checkpoint_freq (int freq)

bool	if_to_checkpoint () const
	Check if need to checkpoint.

const char *	checkpoint_file () const

int	checkpoint_freq () const

MolecularEnergy &	operator= (const MolecularEnergy &)

virtual double	energy ()
	A wrapper around value();.

virtual RefSCDimension	moldim () const

void	guess_hessian (RefSymmSCMatrix &)
	Compute a quick, approximate hessian.

RefSymmSCMatrix	inverse_hessian (RefSymmSCMatrix &)

int	gradient_implemented () const
	Reports whether gradient is implemented either analytically or using MolecularGradient object. More...

int	hessian_implemented () const
	Reports whether hessian is implemented either analytically or using MolecularHessian object. More...

void	set_desired_gradient_accuracy (double acc)
	These functions overload their Function counterparts. More...

void	set_desired_hessian_accuracy (double acc)

void	set_molhess (const Ref< MolecularHessian > &molhess)
	Use this function to provide MolecularHessian object that will be used to compute hessian. More...

const Ref< MolecularHessian > &	molhess () const

RefSymmSCMatrix	hessian ()
	Will throw if hessian_implemented() returns 0.

void	set_molgrad (const Ref< MolecularGradient > &molgrad)
	Use this function to provide MolecularGradient object that will be used to compute gradient. More...

const Ref< MolecularGradient > &	molgrad () const

RefSCVector	gradient ()
	Will throw if gradient_implemented() returns 0.

void	set_x (const RefSCVector &)
	Set and retrieve the coordinate values.

RefSCVector	get_cartesian_x ()
	Return the cartesian coordinates.

RefSCVector	get_cartesian_gradient ()
	Return the cartesian gradient.

RefSymmSCMatrix	get_cartesian_hessian ()
	Return the cartesian hessian.

Ref< MolecularCoor >	molecularcoor ()

Ref< NonlinearTransform >	change_coordinates ()
	An optimizer can call change coordinates periodically to give the function an opportunity to change its coordinate system. More...

virtual void	purge ()
	This function purges any caches of data in MolecularEnergy. More...

const RefSCVector &	electric_field () const
	returns the electric field vector

void	print_natom_3 (const RefSCVector &, const char *t=0, std::ostream &o=ExEnv::out0()) const
	Nicely print n x 3 data that are stored in a vector.

void	print_natom_3 (double *, const char t=0, std::ostream &o=ExEnv::out0()) const

void	print_natom_3 (double , const char t=0, std::ostream &o=ExEnv::out0()) const

Public Member Functions inherited from sc::Function
int	gradient_needed () const

int	do_gradient (int)

virtual double	actual_gradient_accuracy () const

virtual double	desired_gradient_accuracy () const

AccResultRefSCVector &	gradient_result ()

int	hessian_needed () const

int	do_hessian (int)

virtual double	actual_hessian_accuracy () const

virtual double	desired_hessian_accuracy () const

AccResultRefSymmSCMatrix &	hessian_result ()

virtual bool	desired_value_accuracy_set_to_default () const

virtual bool	desired_gradient_accuracy_set_to_default () const

virtual bool	desired_hessian_accuracy_set_to_default () const

RefSCVector	get_x () const

const RefSCVector &	get_x_no_copy () const

void	print_desired_accuracy (std::ostream &=ExEnv::out0()) const
	similar to print(), but only prins desired accuracies

virtual bool	throw_if_tolerance_exceeded () const
	Overridden Compute member.

	Function ()

	Function (StateIn &)

	Function (const Function &)

	Function (const Ref< KeyVal > &, double funcacc=DBL_EPSILON, double gradacc=DBL_EPSILON, double hessacc=DBL_EPSILON)
	The keyval constructor reads the following keywords: More...

virtual	~Function ()

Function &	operator= (const Function &)

Ref< SCMatrixKit >	matrixkit () const
	Return the SCMatrixKit used to construct vectors and matrices.

RefSCDimension	dimension () const
	Return the SCDimension of the problem.

virtual double	value ()
	Return the value of the function.

int	value_needed () const
	Returns nonzero if the current value is not up-to-date.

int	do_value (int)
	If passed a nonzero number, compute the value the next time compute() is called. More...

AccResultdouble &	value_result ()

virtual double	actual_value_accuracy () const
	Return the accuracy with which the value has been computed.

virtual double	desired_value_accuracy () const
	Return the accuracy with which the value is to be computed.

Public Member Functions inherited from sc::SavableState
SavableState &	operator= (const SavableState &)

void	save_state (StateOut &)
	Save the state of the object as specified by the StateOut object. More...

void	save_object_state (StateOut &)
	This can be used for saving state when the exact type of the object is known for both the save and the restore. More...

virtual void	save_vbase_state (StateOut &)
	Save the virtual bases for the object. More...

Public Member Functions inherited from sc::DescribedClass
	DescribedClass (const DescribedClass &)

DescribedClass &	operator= (const DescribedClass &)

ClassDesc *	class_desc () const MPQC__NOEXCEPT
	This returns the unique pointer to the ClassDesc corresponding to the given type_info object. More...

const char *	class_name () const
	Return the name of the object's exact type.

int	class_version () const
	Return the version of the class.

Ref< DescribedClass >	ref ()
	Return this object wrapped up in a Ref smart pointer. More...

Public Member Functions inherited from sc::RefCount
size_t	identifier () const
	Return the unique identifier for this object that can be compared for different objects of different types. More...

int	lock_ptr () const
	Lock this object.

int	unlock_ptr () const
	Unlock this object.

void	use_locks (bool inVal)
	start and stop using locks on this object

refcount_t	nreference () const
	Return the reference count.

refcount_t	reference ()
	Increment the reference count and return the new count.

refcount_t	dereference ()
	Decrement the reference count and return the new count.

int	managed () const

void	unmanage ()
	Turn off the reference counting mechanism for this object. More...

Protected Member Functions
void	write_input (int convergence)
	Prepares a complete Psi input file. The input file is assumed to have been opened.

void	write_rasci_input (int convergence, bool rasscf)

std::vector< unsigned int >	map_density_to_sb ()
	returns the index map that transforms indices in which densities are reported in Psi to the symmetry-blocked indices. More...

Protected Member Functions inherited from sc::PsiCorrWavefunction
void	write_input (int conv)
	Prepares a complete Psi input file. The input file is assumed to have been opened.

void	write_input_frozen2restricted (int conv, bool fz2restr)

double	valacc_to_refacc () const

Protected Member Functions inherited from sc::PsiWavefunction
std::vector< unsigned int >	read_occ (const Ref< KeyVal > &keyval, const char *name, size_t nirrep)

int	debug () const
	return the debug level

Protected Member Functions inherited from sc::Wavefunction
double	min_orthog_res ()

double	max_orthog_res ()

void	copy_orthog_info (const Ref< Wavefunction > &)

Protected Member Functions inherited from sc::MolecularEnergy
void	failure (const char *)

virtual void	set_energy (double)
	This is just a wrapper around set_value().

virtual void	set_gradient (RefSCVector &)
	These are passed gradients and hessian in cartesian coordinates. More...

virtual void	set_hessian (RefSymmSCMatrix &)

void	x_to_molecule ()

void	molecule_to_x ()

virtual bool	analytic_gradient_implemented () const
	must overload this in a derived class if analytic gradient can be computed More...

virtual bool	analytic_hessian_implemented () const
	must overload this in a derived class if analytic hessian can be computed More...

Protected Member Functions inherited from sc::Function
virtual void	set_value (double)

virtual void	set_matrixkit (const Ref< SCMatrixKit > &)
	Set the SCMatrixKit that should be used to construct the requisite vectors and matrices.

virtual void	set_dimension (const RefSCDimension &)

virtual void	set_actual_value_accuracy (double)

virtual void	set_actual_gradient_accuracy (double)

virtual void	set_actual_hessian_accuracy (double)

RefSCVector &	get_x_reference ()
	Get read/write access to the coordinates for modification.

void	do_change_coordinates (const Ref< NonlinearTransform > &)
	Change the coordinate system and apply the given transform to intermediates matrices and vectors.

Protected Member Functions inherited from sc::SavableState
	SavableState (const SavableState &)

	SavableState (StateIn &)
	Each derived class StateIn CTOR handles the restore corresponding to calling save_object_state, save_vbase_state, and save_data_state listed above. More...

Protected Member Functions inherited from sc::RefCount
	RefCount (const RefCount &)

RefCount &	operator= (const RefCount &)

Protected Attributes
bool	opdm_print_

bool	tpdm_print_
	print the one-particle density matrix

int	root_
	print the two-particle density matrix

int	multiplicity_
	compute a specific root of the wave function

int	nroots_
	the spin multiplicity of the target state

int	target_sym_
	number of roots for detci calculations

int	h0_blocksize_
	the symmetry (irrep) of the target root

bool	repl_otf_
	block size for the H0 guess

int	energy_convergence_
	do CI string replacements on the fly. saves memory, but is slower.

int	convergence_

int	maxiter_

Ref< OrbitalSpace >	orbs_sb_ [NSpinCases1]
	maxiter for detci

Ref< OrbitalSpace >	occ_ [NSpinCases1]

RefSymmSCMatrix	onepdm_occ_ [NSpinCases1]

RefSymmSCMatrix	twopdm_occ_ [NSpinCases2]

RefSymmSCMatrix	twopdm_sf_occ_

std::vector< unsigned int >	ras1_

std::vector< unsigned int >	ras2_

std::vector< unsigned int >	ras3_

int	ras1_max_

int	ras3_max_

double	scf_levelshift_

int	scf_stop_levelshift_
	Psi3 cscf levelshift.

Ref< OneBodyWavefunction >	valence_obwfn_
	number of iterations, for which the levelshift is applied More...

std::vector< unsigned int >	moorder_
	orbital reordering

Protected Attributes inherited from sc::PsiCorrWavefunction
Ref< PsiSCF >	reference_

unsigned int	nfzc_

unsigned int	nfzv_

std::vector< unsigned int >	frozen_docc_

std::vector< unsigned int >	frozen_uocc_

RefSymmSCMatrix	mo_density_ [NSpinCases1]

Protected Attributes inherited from sc::PsiWavefunction
Ref< PsiWavefunction >	prerequisite_

int	nirrep_

size_t	memory_

char *	memory_str_

bool	compute_1rdm_

char *	dertype_

Protected Attributes inherited from sc::Wavefunction
ResultRefSCMatrix	natural_orbitals_

ResultRefDiagSCMatrix	natural_density_

Ref< GaussianBasisSet >	gbs_

int	debug_

Protected Attributes inherited from sc::MolecularEnergy
Ref< PointGroup >	initial_pg_

int	print_molecule_when_changed_

Protected Attributes inherited from sc::Function
Ref< SCMatrixKit >	matrixkit_
	Used to construct new matrices.

RefSCVector	x_
	The variables.

RefSCDimension	dim_
	The dimension of x_.

AccResultdouble	value_
	The value of the function at x_.

AccResultRefSCVector	gradient_
	The gradient at x_.

AccResultRefSymmSCMatrix	hessian_
	The hessian at x_.

bool	desired_value_accuracy_set_to_default_

bool	desired_gradient_accuracy_set_to_default_

bool	desired_hessian_accuracy_set_to_default_

bool	throw_if_tolerance_exceeded_

Additional Inherited Members
Static Public Member Functions inherited from sc::PsiWavefunction
static Integral::CartesianOrdering	cartesian_ordering ()
	returns the Psi3 convention for the ordering of the cartesian functions

Static Public Member Functions inherited from sc::Wavefunction
static void	orbitals (const Ref< OrbitalSpace > &orbs, const std::vector< SCVector3 > &r, std::vector< double > &values)

Static Public Member Functions inherited from sc::SavableState
static void	save_state (SavableState *s, StateOut &)

static SavableState *	restore_state (StateIn &si)
	Restores objects saved with save_state. More...

static SavableState *	key_restore_state (StateIn &si, const char *keyword)
	Like restore_state, but keyword is used to override values while restoring.

static SavableState *	dir_restore_state (StateIn &si, const char objectname, const char keyword=0)

Detailed Description

PsiRASCI is a general (RAS) CI PsiWavefunction.

Constructor & Destructor Documentation

◆ PsiRASCI()

sc::PsiRASCI::PsiRASCI ( const Ref< KeyVal > & keyval )

A KeyVal constructor is used to generate a PsiRASCI object from the input.

It recognizes all keywords of PsiCorrWavefunction class and the following keywords:

Keyword	Type	Default	Description
`root`	integer	1	Specifies which state to solve for. The default is the ground state. Value of `root` cannot be greater than `nroots`.
`nroots`	integer	value of `root`	Specifies the number of CI vectors to seek.
`multiplicity`	integer	multiplicity of the `reference` object	Specifies the multiplicity of the state to solve for. The default is same as the multiplicity of the reference wave function. See also PsiCorrWavefunction
`valence_obwfn`	OneBodyWavefunction	null	This optional keyword specifies an object that will provide the orbital ordering for the initial guess. It is recommended to use an SCF object with the minimal basis needed to express the orbitals used in defining the RAS spaces. For example, for a valence RASSCF this means that SCF with an STO-3G basis will suffice. For states with Rydberg character one may want to choose an appropriate ANO basis set.
`ras1`	array of integers	empty	Specifies the RAS I space. Up to `ras1_max` electrons can be excited from RAS I.
`ras2`	array of integers	valence_obwfn orbitals - frozen core - RAS1	Specifies the RAS II space. Any number of electrons is allowed in RAS II
`ras3`	array of integers	all orbitals - frozen core - RAS1 - RAS2	Specifies the RAS III space. Up to `ras3_max` electrons may be excited into RAS III.
`ras1_max`	integer	0	Specifies the maximum number of holes allowed in RAS I.
`ras3_max`	integer	0	Specifies the maximum number of electrons allowed in RAS III.
`repl_otf`	boolean	false	Set to true to avoid precomputing single replacement lists (this makes memory requirement in MRCI lower, at the cost of possibly increased computation time). Not used in RASSCF computations.

Member Function Documentation

◆ compute()

void sc::PsiRASCI::compute ( )

virtual

Recompute at least the results that have compute true and are not already computed.

This should only be called by Result's members.

Implements sc::Compute.

Reimplemented in sc::PsiRASSCF.

◆ magnetic_moment()

double sc::PsiRASCI::magnetic_moment ( ) const

virtual

Computes the S (or J) magnetic moment of the target state(s), in units of $\hbar/2$ .

Can be evaluated from density and overlap, as;

(this->alpha_density() * this-> overlap()).trace() -

(this->beta_density() * this-> overlap()).trace()

but derived Wavefunction may have this value as user input.

Returns: the magnetic moment

Reimplemented from sc::Wavefunction.

◆ map_density_to_sb()

std::vector<unsigned int> sc::PsiRASCI::map_density_to_sb ( )

protectedvirtual

returns the index map that transforms indices in which densities are reported in Psi to the symmetry-blocked indices.

Single-reference correlated methods in Psi report densities using QT-ordered indices, whereas multireference methods use RAS ordering. The default implementation of this function assumes the former. Overload as necessary.

Reimplemented from sc::PsiCorrWavefunction.

◆ mo_density()

RefSymmSCMatrix sc::PsiRASCI::mo_density ( SpinCase1 spin )

virtual

Returns: the density in space specified by orbs_sb()

Implements sc::PsiWavefunction.

◆ occ()

const Ref<OrbitalSpace>& sc::PsiRASCI::occ ( SpinCase1 spin )

returns occupied OrbitalSpace.

If ras3_max=0 this is a subset of the space reported by orbs_sp(). This space is symmetry-blocked.

◆ save_data_state()

void sc::PsiRASCI::save_data_state ( StateOut & )

virtual

Save the base classes (with save_data_state) and the members in the same order that the StateIn CTOR initializes them.

This must be implemented by the derived class if the class has data.

Reimplemented from sc::MolecularEnergy.

Reimplemented in sc::PsiRASSCF.

Member Data Documentation

◆ valence_obwfn_

Ref<OneBodyWavefunction> sc::PsiRASCI::valence_obwfn_

protected

number of iterations, for which the levelshift is applied

This OneBodyWavefunction defines valence orbitals.

Purpose: If a basis set with diffuse functions is used for a RASSCF calculation, there may be energetically low lying diffuse obitals entering the active space if the orbitals are not reordered. The reference wave function helps to find the appropriate reordering by a 'black box' procedure which can be explained as follows. If the basis set of the reference wave function is chosen to be a small or a minimal basis set, it's virtual orbitals a aready a qualitatively good description of the virtual orbitals of the system, without having the problem of orbitals that have to be reordered. Thus, by computing the overlap between the reference and the original wave function, the 'correct' active space orbitals of the orginal wave function are those which show the largest overlap with the corresponding active space orbitals of the reference wave function. This procedure is used as soon as the the "valence_obwfn" keyword is specified.

The documentation for this class was generated from the following file:

src/lib/chemistry/qc/psi/psici.h

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ PsiRASCI()

Member Function Documentation

◆ compute()

◆ magnetic_moment()

◆ map_density_to_sb()

◆ mo_density()

◆ occ()

◆ save_data_state()

Member Data Documentation

◆ valence_obwfn_