The helper class for th construction of the two particle reduced density matrix. More...

#include <rdm.h>

Inheritance diagram for syten::MPS::RDMs::TwoParticleRDM:

Collaboration diagram for syten::MPS::RDMs::TwoParticleRDM:

Public Types
typedef std::array< std::string, 2 >	OperatorSymbs
	The type containing a list of SSOs without the spin. More...

typedef Vec< std::string >	Spins
	The tpye containing the spin degrees of freedom. More...

Public Member Functions
void	construct ()
	Actually constructs the RDM. More...

DenseTensor< 4, SDef > const &	getRDM (Index const s, Index const p) const
	Returns a reference to a requested RDM. More...

DenseTensor< 4, SDef >	moveRDM (Index const s, Index const p)
	Returns the RDM as rvalue. More...

DenseTensor< 4, SDef >	sumOverSpins () const
	Takes the full RDM and sums over the spins. More...

	TwoParticleRDM (State &psi_, Lattice const &lat_, OperatorSymbs const &ops, Spins const &spins_)
	Constructor taking an MPS, a lattice and some operators and storing everything. More...

Public Member Functions inherited from syten::MPS::RDMs::RDM
virtual void	construct ()=0
	Every RDM needs to specify how it's constructed. More...

	RDM (State &psi_)
	Constructor. More...

Private Member Functions
Tensor< 4 >	contr (Tensor< 3 > const &r, Index const site) const
	Contracts the site tensor with a given right block. More...

DenseTensor< 4, SDef > &	gamma (Index const sigma, Index const sigma_prime)
	Returns the correct reduced density matrix. More...

void	inner_first_constr (std::array< Index, 2 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w1_block, std::array< Index, 3 > const &set_order)
	Matrix elements od the form ijkj. More...

void	inner_first_constr_one_one_path1 (std::array< Index, 2 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w1_block)
	Constructs elements. More...

void	inner_first_constr_one_one_path2 (std::array< Index, 2 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w1_block)
	Constructs elements. More...

void	inner_first_constr_one_one_path3 (std::array< Index, 2 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w1_block)
	Constructs elements. More...

void	inner_first_constr_one_one_path4 (std::array< Index, 2 > const &indices, Index const sigma, Tensor< 3 > &w1_block)
	Constructs elements. More...

void	inner_first_constr_one_one_path5 (std::array< Index, 2 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w1_block)
	Constructs elements. More...

void	inner_first_constr_one_one_path6 (std::array< Index, 2 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w1_block)
	Constructs elements. More...

void	inner_first_constr_one_one_path7 (std::array< Index, 2 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w1_block)
	Constructs elements. More...

void	inner_first_constr_one_one_path8 (std::array< Index, 2 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w1_block)
	Constructs elements. More...

void	inner_first_constr_one_one_path9 (std::array< Index, 2 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w1_block)
	Constructs elements. More...

void	inner_first_constr_path1 (std::array< Index, 3 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w2_block, bool const first_path)
	Constructs the blocks with all operators, i.e. More...

void	inner_first_constr_path2_1 (std::array< Index, 3 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w2_block)
	Constructs the blocks with all operators, i.e. More...

void	inner_first_constr_path2_2 (std::array< Index, 3 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w2_block)
	Constructs the blocks with all operators, i.e. More...

void	inner_first_constr_path3_1 (std::array< Index, 3 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w2_block)
	Constructs the blocks with all operators, i.e. More...

void	inner_first_constr_path3_2 (std::array< Index, 3 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w2_block)
	Constructs the blocks with all operators, i.e. More...

void	inner_first_constr_two (Index const j, Index const sigma, Tensor< 3 > &w3_block)
	Constructs elements. More...

void	inner_first_constr_two_path1 (Index const j, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w3_block)
	Constructs elements. More...

void	inner_first_constr_two_path2 (Index const j, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w3_block)
	Constructs elements. More...

void	inner_second_constr (Index const j, Index const sigma, Tensor< 3 > &w2_block)
	Constructs operators with a particle number like SSO in the middle. More...

void	inner_second_constr_path1 (std::array< Index, 2 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w3_block)
	Constructs the blocks with three right ops, the two right most are annihilators. More...

void	inner_second_constr_path2 (std::array< Index, 2 > const &indices, std::array< Index, 2 > const &sigmas, Tensor< 3 > &w3_block)
	Constructs the blocks with three right ops, the right most is an annihilators, the second right most is a creator. More...

void	inner_second_constr_path3 (std::array< Index, 2 > const &indices, Index const sigma, Tensor< 3 > &w3_block)
	Constructs the blocks with three right ops, the right most is an annihilators, the second right most is a creator. More...

void	inner_second_constr_path4 (Index const j, std::array< Index, 2 > const &sigmas, Tensor< 3 > w2_block)
	Constructs operators with two SSOs on right-most site. More...

void	inner_second_constr_path5 (Index const j, std::array< Index, 2 > const &sigmas, Tensor< 3 > w2_block)
	Constructs operators with two SSOs on right-most site. More...

void	inner_third_constr (Index const j, Index const sigma, Tensor< 3 > w4_block)
	Constructs the blocks with two right ops. More...

Tensor< 3 >	right_contr (Index const currentSite, Tensor< 4 > const &mpo_cmp, Tensor< 4 > const &mr) const
	Takes the MPO component and right-contraction for site i-1 multiplied with ψ_i and computes the right-block for site i. More...

void	set_and_perm (SDef const element, std::array< Index, 2 > const &sigmas, std::array< Index, 4 > const &indices)
	Sets the element to a entry of the tensors and does all the permutations. More...

Static Private Member Functions
static SDef	matrix_element (Tensor< 3 > const &right)
	Computes the matrix element from given right contraction. More...

Private Attributes
std::string const	annihilator
	Symbol for annihilation operator. More...

std::string const	creator
	Symbol for creation operator. More...

Lattice const &	lat
	The lattice. More...

std::string const	number = "n"
	Symbol for number operator. More...

Vec< DenseTensor< 4, SDef > >	rdms
	The actual RDMs. More...

Spins const	spins
	Spin degrees of freedom. More...

Additional Inherited Members
Public Attributes inherited from syten::MPS::RDMs::RDM
bool	verbose_output = true
	Print the progress or not. More...

Protected Attributes inherited from syten::MPS::RDMs::RDM
State &	psi
	The state. More...

Index const	size
	Total size of the system, stored locally. More...

Detailed Description

The helper class for th construction of the two particle reduced density matrix.

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

inc/mps/rdm.h
inc/mps/rdm.cpp

Public Types

Public Member Functions

Private Member Functions

Static Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description