#include <TensorT.h>

Inheritance diagram for CheMPS2::TensorT:

Collaboration diagram for CheMPS2::TensorT:

Public Member Functions
	TensorT (const int site_index, const SyBookkeeper *denBK)
	Constructor. More...

virtual	~TensorT ()
	Destructor.

int	gNKappa () const
	Get the number of symmetry blocks. More...

double *	gStorage ()
	Get the pointer to the storage. More...

int	gKappa (const int N1, const int TwoS1, const int I1, const int N2, const int TwoS2, const int I2) const
	Get the index corresponding to a certain tensor block. More...

int	gKappa2index (const int kappa) const
	Get the storage jump corresponding to a certain tensor block. More...

double *	gStorage (const int N1, const int TwoS1, const int I1, const int N2, const int TwoS2, const int I2)
	Get the pointer to the storage of a certain tensor block. More...

int	gIndex () const
	Get the location index. More...

const SyBookkeeper *	gBK () const
	Get the pointer to the symmetry bookkeeper. More...

void	sBK (const SyBookkeeper *newBK)
	Set the pointer to the symmetry bookkeeper. More...

void	random ()
	Fill storage with random numbers 0 < val < 1.

void	number_operator (const double alpha, const double beta)
	Apply alpha * ( number operator ) + beta to the MPS tensor. More...

void	QR (Tensor *Rstorage)
	Left-normalization. More...

void	LQ (Tensor *Lstorage)
	Right-normalization. More...

void	LeftMultiply (Tensor *Mx)
	Multiply at the left with a diagonal TensorOperator. More...

void	RightMultiply (Tensor *Mx)
	Multiply at the right with a diagonal TensorOperator. More...

void	Reset ()
	Reset the TensorT (if virtual dimensions are changed)

bool	CheckLeftNormal () const
	Check whether the TensorT is left-normal. More...

bool	CheckRightNormal () const
	Check whether the TensorT is right-normal. More...

Additional Inherited Members
Protected Attributes inherited from CheMPS2::Tensor
int	index
	Index of the Tensor object. For TensorT: a site index; for other tensors: a boundary index.

double *	storage
	The actual variables. Tensor block kappa begins at storage+kappa2index[kappa] and ends at storage+kappa2index[kappa+1].

int	nKappa
	Number of Tensor blocks.

int *	kappa2index
	kappa2index[kappa] indicates the start of tensor block kappa in storage. kappa2index[nKappa] gives the size of storage.

Detailed Description

TensorT class.

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

Date: February 18, 2013

The TensorT class is a storage and gauge transformation class for MPS tensors.

Definition at line 32 of file TensorT.h.

Constructor & Destructor Documentation

CheMPS2::TensorT::TensorT	(	const int	site_index,
		const SyBookkeeper *	denBK
	)

Constructor.

Parameters

site_index	The site index
denBK	The symmetry bookkeeper of the MPS

Definition at line 29 of file TensorT.cpp.

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Member Function Documentation

bool CheMPS2::TensorT::CheckLeftNormal ( ) const

Check whether the TensorT is left-normal.

Returns: Whether TensorT is left-normal

Definition at line 433 of file TensorT.cpp.

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bool CheMPS2::TensorT::CheckRightNormal ( ) const

Check whether the TensorT is right-normal.

Returns: Whether TensorT is right-normal

Definition at line 474 of file TensorT.cpp.

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const CheMPS2::SyBookkeeper * CheMPS2::TensorT::gBK ( ) const

Get the pointer to the symmetry bookkeeper.

Returns: the pointer to the symmetry bookkeeper

Definition at line 163 of file TensorT.cpp.

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int CheMPS2::TensorT::gIndex ( ) const

virtual

Get the location index.

Returns: the index

Implements CheMPS2::Tensor.

Definition at line 161 of file TensorT.cpp.

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int CheMPS2::TensorT::gKappa	(	const int	N1,
		const int	TwoS1,
		const int	I1,
		const int	N2,
		const int	TwoS2,
		const int	I2
	)		const

virtual

Get the index corresponding to a certain tensor block.

Parameters

N1	The left particle number sector
TwoS1	The left spin symmetry sector
I1	The left irrep sector
N2	The right particle number sector
TwoS2	The right spin symmetry sector
I2	The right irrep sector

Returns: The kappa corresponding to the input parameters; -1 means no such block

Implements CheMPS2::Tensor.

Definition at line 136 of file TensorT.cpp.

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int CheMPS2::TensorT::gKappa2index ( const int kappa ) const

virtual

Get the storage jump corresponding to a certain tensor block.

Parameters

kappa The symmetry block

Returns: kappa2index[ kappa ], the memory jumper to a certain block

Implements CheMPS2::Tensor.

Definition at line 151 of file TensorT.cpp.

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int CheMPS2::TensorT::gNKappa ( ) const

virtual

Get the number of symmetry blocks.

Returns: The number of symmetry blocks

Implements CheMPS2::Tensor.

Definition at line 132 of file TensorT.cpp.

double * CheMPS2::TensorT::gStorage ( )

virtual

Get the pointer to the storage.

return pointer to the storage

Implements CheMPS2::Tensor.

Definition at line 134 of file TensorT.cpp.

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double * CheMPS2::TensorT::gStorage	(	const int	N1,
		const int	TwoS1,
		const int	I1,
		const int	N2,
		const int	TwoS2,
		const int	I2
	)

virtual

Get the pointer to the storage of a certain tensor block.

Parameters

N1	The left particle number sector
TwoS1	The left spin symmetry sector
I1	The left irrep sector
N2	The right particle number sector
TwoS2	The right spin symmetry sector
I2	The right irrep sector