#include <Heff.h>

Public Member Functions
	Heff (const SyBookkeeper denBKIn, const Problem ProbIn, const double dvdson_rtol_in)
	Constructor. More...

virtual	~Heff ()
	Destructor.

double	SolveDAVIDSON (Sobject denS, TensorL Ltensors, TensorOperator Atensors, TensorOperator Btensors, TensorOperator Ctensors, TensorOperator Dtensors, TensorS0 S0tensors, TensorS1 S1tensors, TensorF0 F0tensors, TensorF1 F1tensors, TensorQ Qtensors, TensorX Xtensors, int nLower=0, double *VeffTilde=NULL) const
	Davidson Solver. More...

Static Public Member Functions
static int	phase (const int TwoTimesPower)
	Phase function. More...

Detailed Description

Heff class.

Author: Sebastian Wouters sebas.nosp@m.tian.nosp@m.woute.nosp@m.rs@g.nosp@m.mail..nosp@m.com

The Heff class contains the sparse eigensolver routines and effective Hamiltonian construction needed for the DMRG algorithm.

Definition at line 42 of file Heff.h.

Constructor & Destructor Documentation

Constructor.

Parameters

denBKIn	The SyBookkeeper to get the dimensions
ProbIn	The Problem that contains the Hamiltonian
dvdson_rtol_in	The residual tolerance for the DMRG Davidson iterations

Definition at line 31 of file Heff.cpp.

static int CheMPS2::Heff::phase ( const int TwoTimesPower )

inlinestatic

Phase function.

Parameters

TwoTimesPower Twice the power of the phase (-1)^{power}

Definition at line 75 of file Heff.h.

double CheMPS2::Heff::SolveDAVIDSON	(	Sobject *	denS,
		TensorL ***	Ltensors,
		TensorOperator ****	Atensors,
		TensorOperator ****	Btensors,
		TensorOperator ****	Ctensors,
		TensorOperator ****	Dtensors,
		TensorS0 ****	S0tensors,
		TensorS1 ****	S1tensors,
		TensorF0 ****	F0tensors,
		TensorF1 ****	F1tensors,
		TensorQ ***	Qtensors,
		TensorX **	Xtensors,
		int	nLower = `0`,
		double **	VeffTilde = `NULL`
	)		const

Parameters

denS	Initial guess S-object
Ltensors	Pointer to the single contracted 2nd quantized operators
Atensors	Spin-0 complementary operators of two creators
Btensors	Spin-1 complementary operators of two creators
Ctensors	Spin-0 complementary operators of a creator and an annihilator
Dtensors	Spin-1 complementary operators of a creator and an annihilator
S0tensors	Spin-0 reduction of two creators
S1tensors	Spin-1 reduction of two creators
F0tensors	Spin-0 reduction of a creator and an annihilator
F1tensors	Spin-1 reduction of a creator and an annihilator
Qtensors	Complementary operators of three sandwiched 2nd quantized operators
Xtensors	Pointer to the completely contracted terms
nLower	Number of lower-lying states to project out
VeffTilde	The projection operators to project the nLower lower-lying states out

Definition at line 317 of file Heff.cpp.

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