syten::T3N::TDVP::Worker Class Reference

TDVP worker. More...

#include <tdvp.h>

Collaboration diagram for syten::T3N::TDVP::Worker:

Public Member Functions
void	do_step ()
	Does an entire time step sweeping forward and backward. More...
Errors	get_errs () const
	Returns errors. More...
std::vector< DenseTensor< 2 > > const &	get_global_Us () const
	Gives back the rotation. More...
Timer const &	get_timer () const
	Returns timer. More...
void	initArgs (int argc_, char **argv_)
	Initialses arguments. More...
template<class Archive >
void	load (Archive &ar, unsigned int const in_version)
	Load. More...
bool	reached_final_T () const
	True if final time is reached. More...
void	run (bool const do_step_=false)
	Run TDVP. More...
template<class Archive >
void	save (Archive &ar, unsigned int const in_version) const
	Overload to satisty boost. More...
template<class Archive >
void	save (Archive &ar, unsigned int const)
	Save. More...
Conf const &	showConf () const
	Shows the TDVP Configuration. More...
std::vector< Operator > const &	showHamiltonian () const
	Returns the operators. More...
State const &	showPsi () const
	Gives a const. More...
	Worker ()=default
	Default ctor. More...
	Worker (State &&psi_, Vec< Operator > &&ops_, Conf &&conf_, Vec< Operator > &&obs_=Vec< Operator >())
	Standard ctor. More...

Static Public Attributes
static constexpr unsigned int	version = 1
	Version. More...

Private Member Functions
bool	checkSignals () const
	Checks for signals. More...
void	contract (Position const &pos, LegType const dir)
	Forwarder to build the contraction on node cptr from the neighbours of cptr, pptr and optr in direction dir. More...
void	evolve_bond (Position const &pos, STensor &bond, SDef const prefactor, LegType const dir)
	Back evolves the bond in direction to the next site. More...
void	evolve_branching_1site (Position const &pos, Vec< std::reference_wrapper< T3NTensor const > > const &w_refs, SDef const prefactor)
	Evolves one Branching Node. More...
void	evolve_phys_1site (Position const &pos, Vec< std::reference_wrapper< T3NTensor const > > const &w_refs, SDef const prefactor)
	Evolves one Physical Node. More...
void	evolve_phys_2site (STensor &site, Vec< T3NTensor > const &ws, SDef const prefactor, LegType const dir, Position const &pos)
	Evolves two Physical Nodes. More...
void	evolve_phys_branch (STensor &site, Vec< STensor > const &ws, SDef const prefactor, LegType const direction, Position const &pos)
	Evolves physical branching contraction. More...
void	evolve_phys_branch_phys (STensor &site, Vec< STensor > const &ws, SDef const prefactor, LegType const direction, LegType const secondDir, Position const &pos)
	Evolves physical branching physical contraction. More...
void	initialise_path_rec (Position &pos, bool &rightMostReached)
void	log_time_step (SRDef const &res_norm, std::string const &filename)
	Prints the time step information. More...
void	mode_transform_2phys (Position const &pos, LegType const dir)
	Actually performs the mt on two neighbouring physical nodes. More...
void	mode_transform_2phys_branch (Position const &pos, LegType const dir, LegType const second)
	Actually performs the mt on two physical and a branching node. More...
void	mode_transform_node (Position const &pos, LegType const dir)
	Switch to decide which mt scheme to choose. More...
void	mode_transform_rec (Position &pos)
	Applies mode transformation recursively. More...
STensor	norm_bond (Position const &pos, LegType const &direction)
	Returns the bond in direction to the next site. More...
void	normalise_network (Position const &pos, LegType towards)
	Normalises the network from position pos towards towards. More...
void	resetPosition ()
	Set position to start. More...
void	update (Position &pos)
	Updates a subtree recursively. More...
void	update_branch (LegType const direction, Position const &pos)
	Performs the actual update on a Branching Node. More...
void	update_node (Position const &pos, LegType const dir, LegType const secondDir, bool const backEvolveSecondPhysOnly)
	A helper function in order to distinguish the kinds of updates. More...
void	update_phys (LegType const direction, Position const &pos)
	Performs the actual update on a Physical Node. More...
void	update_phys_branch (LegType const dir, Position const &pos)
	Updates a contraction of a physical and a branching node. More...
void	update_phys_branch_phys (LegType const dir, LegType const secondDir, Position const &pos, bool const backEvolveSecondPhysOnly)
	Updates two physical sites. More...
void	update_phys_phys (LegType const dir, Position const &pos)
	Two site updates an MP constallation. More...
Contraction of operator and state.
void	build_rootContr (Position const &pos) const
	Build a local root-pointing contraction of the operator with the state (based on) the nodes given as arguments. More...
void	build_rootContr_rec (Position &pos) const
	Recursively build an entire tree of root-pointing contractions. More...
void	build_descendantContr (LegType const which, Position const &pos) const
	Build a contraction pointing towards the requested direction. More...

Private Attributes
int	argc
char **	argv
Vec< LegType >	backward_path
	Path which is went during backwards step. More...
Conf	conf
	configuration More...
Contractions	contrs
	Contractions of op & psi. More...
Index	count = 0
	Counts the number of time-steps made. More...
DenseTensor< 2, SDef >	expect
	Dense tensor storing the expectation values. More...
Vec< LegType >	forward_path
	Path which is went during forward timestep. More...
SRDef	krylov_error = 0.
	Krylov error. More...
Vec< Operator >	obs
	Shows the current position during optimisation. More...
Vec< Operator >	ops
	Operator H in exp(-i dt H) More...
Position	position
SRDef	proj_error = NAN
	Projection error. More...
State	psi
	current state More...
Index	step_id = 0
	Current step number. More...
Timer	timer
	Timer for performance information. More...
SRDef	trunc_error = 0.
	Truncation error. More...
Vec< DenseTensor< 2 > >	Us = {}
	For transforming the creation and annihilation operators. More...

Static Private Attributes
static std::string const	uuid = "6b0c9bfa-cf5d-11eb-b8bc-0242ac130003"
	UUID. More...

Detailed Description

TDVP worker.

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

• inc/t3n/tdvp.h
• inc/t3n/tdvp.cpp