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SyTen
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SyTen
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Implementation for inc/mps/state.h. More...
#include "inc/util/common_exceptions.h"#include "inc/mps/state.h"#include "inc/tensor/tensor_gen.h"#include "inc/tensor/tensor_svd.h"#include "inc/tensor/tensor_qr.h"#include "inc/tensor/tensor_misc.h"#include "inc/util/timer.h"#include "inc/util/persistent.h"#include "inc/tensor/tensor_operators.h"#include "inc/tensor/tensor_prod.h"#include "inc/tensor/tensor_to_dense.h"#include "inc/dense/dense_transpose.h"#include "inc/mps/varapplyortho_mps.h"
Include dependency graph for state.cpp:Namespaces | |
| namespace | syten |
| Syten namespace. | |
| namespace | syten::MPS |
| The namespace containing all MPS-related tools, classes and objects. | |
Functions | |
| SRDef | syten::MPS::apply_op_itrunc (State &a, Operator const &op, Truncation trunc, bool const relax=true, bool const final_rightnorm=true) |
Applies the MPO op to the MPS a, immediately truncating during the application. More... | |
| void | syten::MPS::apply_op_naive (State &a, Operator const &op) |
Applies the MPO op to the MPS a without truncation. More... | |
| SDef | syten::MPS::expectation (State &&a, Operator const &op, State &&b) |
| Returns the expectation value of an operator between two states as \(\langle b | \left(\hat O | a \rangle\right)\). More... | |
| SDef | syten::MPS::expectation (State const &a, Operator const &op) |
| Returns the expectation value of an MPS::Operator \(\hat O\) w.r.t. a MPS::State \(|a\rangle\), i.e. \(\langle a |\hat O|a
\rangle\). More... | |
| SDef | syten::MPS::expectation (State const &a, Operator const &op, State const &b) |
| Returns the expectation value of an operator between two states as \(\langle b | \left(\hat O | a \rangle\right)\). More... | |
| SRDef | syten::MPS::norm (State const &a) |
| Returns the norm of a state, i.e. \(\sqrt{\langle a | a \rangle }\). More... | |
| SRDef | syten::MPS::normSqd (State const &a) |
| Returns the squared norm of a state, i.e. \(\langle a | a \rangle \). More... | |
| State | syten::MPS::operator+ (State const &a, State const &b) |
| Adds two states together as \(|\phi\rangle = |a\rangle + |b\rangle\). More... | |
| SDef | syten::MPS::overlap (State const &b, State const &a) |
| Returns the overlap \(\langle b | a \rangle\) between two states. More... | |
| SDef | syten::MPS::overlap (State const &b, State const &a, std::array< Index, 2 > lhs, Index const to) |
| Returns overlap but performs swap operation on blocks beforehand. More... | |
Helper Functions for MPS/MPO calculations | |
| void | syten::MPS::expand_to_left (Tensor< 3 > const &right, Tensor< 3 > const &source, Tensor< 4 > const &op, State &target, Index const position, SRDef const alpha=0.1, Index const max_blocksize=15, SRDef const ratio=1., Index const min_blocksize=1) |
| Calculates an expansion term according to DMRG3S pointing to the left. More... | |
| void | syten::MPS::expand_to_right (Tensor< 3 > const &left, Tensor< 3 > const &source, Tensor< 4 > const &op, State &target, Index const position, SRDef const alpha=0.1, Index const max_blocksize=15, SRDef const ratio=1., Index const min_blocksize=1) |
| Calculates an expansion term according to DMRG3S pointing to the right. More... | |
| Tensor< 3 > | syten::MPS::mps_mpo_ctr_ctr (Tensor< 3 > const &left, Tensor< 3 > const &right, Tensor< 3 > const &lower, Tensor< 4 > const &op) |
| Calculates a local site contraction. More... | |
| Tensor< 3 > | syten::MPS::mps_mpo_mps_ctr_left (Tensor< 3 > const &left, Tensor< 3 > const &lower, Tensor< 3 > const &upper, Tensor< 4 > const &op) |
| Calculates a new left-contraction of an MPO with an MPS. More... | |
| Tensor< 3 > | syten::MPS::mps_mpo_mps_ctr_right (Tensor< 3 > const &right, Tensor< 3 > const &lower, Tensor< 3 > const &upper, Tensor< 4 > const &op) |
| Calculates a new right-contraction of an MPO with an MPS. More... | |
| Tensor< 3 > | syten::MPS::mps_mps_ctr_ctr (Tensor< 2 > const &left, Tensor< 2 > const &right, Tensor< 3 > const &lower) |
| Calculates a local site contraction. More... | |
| Tensor< 2 > | syten::MPS::mps_mps_ctr_left (Tensor< 2 > const &left, Tensor< 3 > const &lower, Tensor< 3 > const &upper) |
| Calculates a new left contraction for overlap of two states. More... | |
| Tensor< 2 > | syten::MPS::mps_mps_ctr_right (Tensor< 2 > const &right, Tensor< 3 > const &lower, Tensor< 3 > const &upper) |
| Calculates a new right contraction for overlap of two states. More... | |
Helper functions for MPS-MPS calculations | |
| void | syten::MPS::addScaled (State &a, State const &b, SDef const s) |
Adds a MPS b, scaled by the scalar prefactor s to the MPS a, essentially a fused-multiply-add for MPS::State. More... | |
| std::vector< SRDef > | syten::MPS::block_entropies (State &state, SRDef const alpha=1.) |
| Computes the Rényi entropies. More... | |
| Tensor< 2 > | syten::MPS::build_ctr_overlap_left (Tensor< 2 > const &left, Tensor< 3 > const &lower, Tensor< 3 > const &upper) |
Combines upper and lower with the existing left-contraction to form a new left contraction. More... | |
| Tensor< 2 > | syten::MPS::build_ctr_overlap_right (Tensor< 2 > const &right, Tensor< 3 > const &lower, Tensor< 3 > const &upper) |
Combines upper and lower with the existing right-contraction to form a new right contraction. More... | |
| Tensor< 3 > | syten::MPS::build_single_site_environment (Tensor< 2 > const &right, Tensor< 2 > const &left, Tensor< 3 > const &local) |
| Combines two rank-2 overlap environment tensors and a single rank-3 MPS tensor into an environment tensor in the standard MPS ordering. More... | |
| Tensor< 4 > | syten::MPS::build_two_site_environment (Tensor< 2 > const &r_cont, Tensor< 2 > const &l_cont, Tensor< 3 > const &local_left, Tensor< 3 > const &local_right) |
| Combines two rank-2 overlap environment tensors and a two rank-3 MPS tensors into an environment tensor. More... | |
| State | syten::MPS::conj (State const &input) |
| Returns a complex-conjugated copy of the input state. More... | |
| std::ostream & | syten::MPS::operator<< (std::ostream &out, State const &s) |
| Outputs all tensors in a MP state. More... | |
| std::vector< std::vector< std::pair< Sector, std::tuple< std::vector< SRDef >, DenseTensor< 2, SDef >, DenseTensor< 2, SDef > > > > > | syten::MPS::schmidt_decompositions (State &state) |
| Returns the Schmidt spectrum and vectors. More... | |
| std::vector< std::vector< SRDef > > | syten::MPS::schmidt_values (State &state) |
| Returns the Schmidt spectrum and spectrum optionally. More... | |
| SRDef | syten::MPS::split_rank_4_into_mps_cnorm (Tensor< 4 > &&r4, Tensor< 3 > &left_site, Tensor< 2 > ¢er, Tensor< 3 > &right_site, Truncation trunc) |
Splits a rank-4 tensor into two rank-3 tensors in standard MPS ordering, truncating according to trunc. More... | |
| SRDef | syten::MPS::split_rank_4_into_mps_lnorm (Tensor< 4 > &&l4, Tensor< 3 > &left_site, Tensor< 3 > &right_site, Truncation trunc) |
Splits a rank-4 tensor into two rank-3 tensors in standard MPS ordering, truncating according to trunc. More... | |
| SRDef | syten::MPS::split_rank_4_into_mps_rnorm (Tensor< 4 > &&r4, Tensor< 3 > &left_site, Tensor< 3 > &right_site, Truncation trunc) |
Splits a rank-4 tensor into two rank-3 tensors in standard MPS ordering, truncating according to trunc. More... | |
| void | syten::MPS::taylor_time_evolution (State &psi, Operator const &u, Truncation const &trunc=Truncation(), std::string const &app_method="itrunc") |
| Time evolves the state by brute-force exponentiation. More... | |
Implementation for inc/mps/state.h.
1.9.4