dmrg_lanczos.hpp File Reference

Defines the lightweight fixed-step Lanczos solve used by finite DMRG. More...

#include <uni20/core/math.hpp>
#include <uni20/core/numeric_limits.hpp>
#include <uni20/core/scalar_concepts.hpp>
#include <uni20/krylov/dense_subspace.hpp>
#include <uni20/krylov/matrix_free.hpp>
#include <algorithm>
#include <cmath>
#include <cstddef>
#include <stdexcept>
#include <type_traits>
#include <utility>
#include <vector>

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Classes
struct	uni20::tensor_network::DmrgLanczosOptions< Real >
	Numerical policy for one lightweight DMRG local Lanczos solve. More...
struct	uni20::tensor_network::DmrgLanczosResult< Real, Vector >
	Approximate local ground state produced by fixed-step DMRG Lanczos. More...

Namespaces
namespace	uni20
namespace	uni20::tensor_network

Functions
template<uni20::LapackRealOrComplex Scalar, class Vector , krylov::KrylovMatrixFreeOperator< Vector, Scalar > Ops>
auto	uni20::tensor_network::dmrg_lanczos_ground_state (Ops &ops, Vector const &initial, DmrgLanczosOptions< uni20::make_real_t< Scalar > > const &options={}) -> DmrgLanczosResult< uni20::make_real_t< Scalar >, Vector >
	Perform a lightweight fixed-step Lanczos local ground-state update.

Detailed Description

Defines the lightweight fixed-step Lanczos solve used by finite DMRG.