gqmps2::MPOGenerator< TenElemT, QNT > Class Template Reference

A generic MPO generator. More...

#include <mpogen.h>

Public Types
using	TenElemVec = std::vector< TenElemT >
using	IndexT = Index< QNT >
using	QNSctT = QNSector< QNT >
using	GQTensorT = GQTensor< TenElemT, QNT >
using	GQTensorVec = std::vector< GQTensorT >
using	PGQTensorVec = std::vector< GQTensorT * >

Public Member Functions
	MPOGenerator (const SiteVec< TenElemT, QNT > &, const QNT &)
	Create a MPO generator. More...
void	AddTerm (const TenElemT, const GQTensorVec &, const std::vector< size_t > &)
	The most generic API for adding a many-body term to the MPO generator. More...
void	AddTerm (const TenElemT, const GQTensorVec &, const std::vector< size_t > &, const GQTensorVec &, const std::vector< std::vector< size_t > > &inst_ops_idxs_set=kNullUintVecVec)
void	AddTerm (const TenElemT, const GQTensorT &, const size_t, const GQTensorT &op2=GQTensorT(), const size_t op2_idx=0, const GQTensorT &inst_op=GQTensorT(), const std::vector< size_t > &inst_op_idxs=kNullUintVec)
	Add one-body or two-body interaction term. More...
FSM	GetFSM (void)
MPO< GQTensorT >	Gen (void)

Detailed Description

template<typename TenElemT, typename QNT>
class gqmps2::MPOGenerator< TenElemT, QNT >

A generic MPO generator.

A matrix-product operator (MPO) generator which can generate an efficient MPO for a quantum many-body system with any type of n-body interaction term.

Template Parameters

TenElemType

Element type of the MPO tensors, can be GQTEN_Double or GQTEN_Complex.

Since

version 0.0.0

Constructor & Destructor Documentation

MPOGenerator()

template<typename TenElemT , typename QNT >

gqmps2::MPOGenerator< TenElemT, QNT >::MPOGenerator	(	const SiteVec< TenElemT, QNT > &	site_vec,
		const QNT &	zero_div
	)

Create a MPO generator.

Create a MPO generator using the sites of the system which is described by a SiteVec.

Parameters

site_vec	The local Hilbert spaces of each sites of the system.
zero_div	The zero value of the given quantum number type which is used to set the divergence of the MPO.

Since

version 0.2.0

Member Function Documentation

AddTerm() [1/2]

template<typename TenElemT , typename QNT >

void gqmps2::MPOGenerator< TenElemT, QNT >::AddTerm	(	const TenElemT	coef,
		const GQTensorVec &	local_ops,
		const std::vector< size_t > &	local_ops_idxs
	)

The most generic API for adding a many-body term to the MPO generator.

Notice that the indexes of the operators have to be ascending sorted.

Parameters

coef	The coefficient of the term.
local_ops	All the local (on-site) operators in the term.
local_ops_idxs	The site indexes of these local operators.

Since

version 0.2.0

AddTerm() [2/2]

template<typename TenElemT , typename QNT >

void gqmps2::MPOGenerator< TenElemT, QNT >::AddTerm	(	const TenElemT	coef,
		const GQTensorT &	op1,
		const size_t	op1_idx,
		const GQTensorT &	op2 = GQTensorT(),
		const size_t	op2_idx = 0,
		const GQTensorT &	inst_op = GQTensorT(),
		const std::vector< size_t > &	inst_op_idxs = kNullUintVec
	)

Add one-body or two-body interaction term.

Parameters

coef	The coefficient of the term.
op1	The first physical operator for the term.
op1_idx	The site index of the first physical operator.
op2	The second physical operator for the term.
op2_idx	The site index of the second physical operator.
inst_op	The insertion operator for the two-body interaction term.
inst_op_idxs	The explicit site indexes of the insertion operator.

Since

version 0.2.0

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

• include/gqmps2/one_dim_tn/mpo/mpogen/mpogen.h
• include/gqmps2/one_dim_tn/mpo/mpogen/mpogen_impl.h