Pre-computes the (LW) contraction and then only multiplies in M and R on each Lanczos step. More...

#include <operator_applicators.h>

Collaboration diagram for syten::MPS::OperatorApplicators::LWMR:

Public Member Functions
	LWMR (std::vector< Tensor< 3 > > const &l_, std::vector< Tensor< 3 > > const &r_, std::vector< std::reference_wrapper< const Tensor< 4 > > > const &w_, std::vector< Tensor< 3 > > const &orthoCmp_={}, DenseTensor< 2 > const &xtxinv={})
	Standard ctor. More...

Tensor< 3 >	operator() (Tensor< 3 > &m) const
	Operator application: evaluates \( \sum_i L^i W^i R^i \cdot M \) and orthogonalises against all \( O^j \). More...

Public Attributes
std::vector< Tensor< 5 > >	lw
	contraction of L and W, precomputed on creation More...

std::vector< Tensor< 3 > > const &	orthoCmp
	orthogonal states projected into MPS basis More...

std::vector< Tensor< 3 > > const &	r
	right contraction More...

DenseTensor< 2 > const &	xtxinv
	inverted overlap matrix of the orthogonal states More...

Detailed Description

Pre-computes the (LW) contraction and then only multiplies in M and R on each Lanczos step.

Also cf. 778cf4cd897b16c488dae4f920c0dc2950676187. Note that for two-site DMRG, LMWR is typically better.

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

Public Member Functions