Eigensolver_IRLanczos Class Reference

Eigenvalue solver with Implicitly Restarted Lanczos algorithm. More...

#include <eigensolver_IRLanczos.h>

Inheritance diagram for Eigensolver_IRLanczos:

Public Member Functions
	Eigensolver_IRLanczos (Fopr *fopr)
	Eigensolver_IRLanczos (unique_ptr< Fopr > &fopr)
	~Eigensolver_IRLanczos ()
void	set_parameters (const Parameters &params)
void	set_parameters (int Nk, int Np, int Niter_eigen, double Enorm_eigen, double Vthreshold)
void	set_parameters (const std::string &sort_type, int Nk, int Np, int Niter_eigen, double Enorm_eigen, double Vthreshold)
void	solve (std::vector< double > &TDa, std::vector< Field > &vk, int &Nsbt, int &Nconv, const Field &b)
Public Member Functions inherited from Eigensolver
	Eigensolver ()
virtual	~Eigensolver ()
void	set_parameter_verboselevel (Bridge::VerboseLevel vl)

Static Public Attributes
static const std::string	class_name = "Eigensolver_IRLanczos"

Private Member Functions
void	step (int Nm, int k, std::vector< double > &TDa, std::vector< double > &TDb, std::vector< Field > &vk, Field &f)
void	qrtrf (std::vector< double > &TDa, std::vector< double > &TDb, int Nk, int Nm, std::vector< double > &Qt, double Dsh, int kmin, int kmax)
void	tqri (std::vector< double > &TDa, std::vector< double > &TDb, int Nk, int Nm, std::vector< double > &Qt)
void	setUnit_Qt (int Nm, std::vector< double > &Qt)
void	schmidt_orthogonalization (Field &w, std::vector< Field > &vk, int k)

Private Attributes
int	m_Nk
int	m_Np
int	m_Niter_eigen
double	m_Enorm_eigen
double	m_Vthreshold
Fopr *	m_fopr
Sorter *	m_sorter

Additional Inherited Members
Protected Attributes inherited from Eigensolver
Bridge::VerboseLevel	m_vl

Detailed Description

Eigenvalue solver with Implicitly Restarted Lanczos algorithm.

This class determines eigenvalues and eigenvectors for a given fermion operator. Low- or high-lying eigenmodes are determined by chaning SortField class object. 28 Dec 2011 H.Matsufuru YAML is implemented. [14 Nov 2012 Y.Namekawa] unique_ptr is introduced to avoid memory leaks [21 Mar 2015 Y.Namekawa]

Definition at line 40 of file eigensolver_IRLanczos.h.

Constructor & Destructor Documentation

Eigensolver_IRLanczos::Eigensolver_IRLanczos ( Fopr *  fopr )

inline

Definition at line 57 of file eigensolver_IRLanczos.h.

Eigensolver_IRLanczos::Eigensolver_IRLanczos ( unique_ptr< Fopr > &  fopr )

inline

Definition at line 60 of file eigensolver_IRLanczos.h.

Eigensolver_IRLanczos::~Eigensolver_IRLanczos

(

)

Definition at line 23 of file eigensolver_IRLanczos.cpp.

Member Function Documentation

void Eigensolver_IRLanczos::qrtrf ( std::vector< double > &  TDa, std::vector< double > &  TDb, int  Nk, int  Nm, std::vector< double > &  Qt, double  Dsh, int  kmin, int  kmax  )

private

Definition at line 447 of file eigensolver_IRLanczos.cpp.

void Eigensolver_IRLanczos::schmidt_orthogonalization ( Field &  w, std::vector< Field > &  vk, int  k  )

private

Definition at line 363 of file eigensolver_IRLanczos.cpp.

void Eigensolver_IRLanczos::set_parameters ( const Parameters &  params )

virtual

Implements Eigensolver.

Definition at line 30 of file eigensolver_IRLanczos.cpp.

void Eigensolver_IRLanczos::set_parameters	(	int	Nk,
		int	Np,
		int	Niter_eigen,
		double	Enorm_eigen,
		double	Vthreshold
	)

Definition at line 74 of file eigensolver_IRLanczos.cpp.

void Eigensolver_IRLanczos::set_parameters	(	const std::string &	sort_type,
		int	Nk,
		int	Np,
		int	Niter_eigen,
		double	Enorm_eigen,
		double	Vthreshold
	)

Definition at line 60 of file eigensolver_IRLanczos.cpp.

void Eigensolver_IRLanczos::setUnit_Qt ( int  Nm, std::vector< double > &  Qt  )

private

Definition at line 375 of file eigensolver_IRLanczos.cpp.

void Eigensolver_IRLanczos::solve ( std::vector< double > &  TDa, std::vector< Field > &  vk, int &  Nsbt, int &  Nconv, const Field &  b  )

virtual

Implements Eigensolver.

Definition at line 109 of file eigensolver_IRLanczos.cpp.

void Eigensolver_IRLanczos::step ( int  Nm, int  k, std::vector< double > &  TDa, std::vector< double > &  TDb, std::vector< Field > &  vk, Field &  f  )

private

Definition at line 318 of file eigensolver_IRLanczos.cpp.

void Eigensolver_IRLanczos::tqri ( std::vector< double > &  TDa, std::vector< double > &  TDb, int  Nk, int  Nm, std::vector< double > &  Qt  )

private

Definition at line 388 of file eigensolver_IRLanczos.cpp.

Member Data Documentation

const std::string Eigensolver_IRLanczos::class_name = "Eigensolver_IRLanczos"

static

Definition at line 43 of file eigensolver_IRLanczos.h.

double Eigensolver_IRLanczos::m_Enorm_eigen

private

Definition at line 50 of file eigensolver_IRLanczos.h.

Fopr* Eigensolver_IRLanczos::m_fopr

private

Definition at line 53 of file eigensolver_IRLanczos.h.

int Eigensolver_IRLanczos::m_Niter_eigen

private

Definition at line 49 of file eigensolver_IRLanczos.h.

int Eigensolver_IRLanczos::m_Nk

private

Definition at line 47 of file eigensolver_IRLanczos.h.

int Eigensolver_IRLanczos::m_Np

private

Definition at line 48 of file eigensolver_IRLanczos.h.

Sorter* Eigensolver_IRLanczos::m_sorter

private

Definition at line 54 of file eigensolver_IRLanczos.h.

double Eigensolver_IRLanczos::m_Vthreshold

private

Definition at line 51 of file eigensolver_IRLanczos.h.

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

• src/lib/Eigen/eigensolver_IRLanczos.h
• src/lib/Eigen/eigensolver_IRLanczos.cpp