syten::IPEPS::State Class Reference

Represents an IPEPS state on a square lattice. More...

#include <state.h>

Collaboration diagram for syten::IPEPS::State:

Classes
struct	DLEntry
	An element of the double layer, containing one splitting and one fusing tensor. More...

Public Member Functions
MemoryUsage::MemorySize	allocSize () const
	memory tracking support More...
Index	c2i (Coord const coord) const
	returns the linear coordinate of the specified unit cell site. More...
Tensor< 3 > const &	crmv () const
	Returns a constant reference to the remover tensor. More...
void	crude_truncate (Truncation trunc)
	Crudely truncates every bond of the state down to the specified maximal blocksize/maximal number of states. More...
void	drop_unmatched ()
	Removes all unmatched blocks from all tensors. More...
void	focus (Coord const coord)
	Does a non-truncating QR-decomposition on all neighbouring sites towards the specified site. More...
char	getClass (Coord const coord) const
	returns the class of the specified site. More...
int	getDepth () const
	returns the depth of the unit cell. More...
Index	getMaxBlocksize () const
	Returns the maximal block size of the state. More...
Index	getMaxStates () const
	Returns the maximal reduced bond dimension of the state. More...
Index	getMaxTotalStates () const
	Returns the maximal total bond dimension of the state. More...
int	getWidth () const
	returns the width of the unit cell. More...
void	init_ctm ()
	initialises the double layer and the ctm (by contraction with itself) More...
void	init_ctm_vac ()
	initialises the double layer and the ctm (via vacuum) More...
bool	is_00_coord (Coord const coord) const
	Returns true if coord corresponds to the [0,0] node. More...
Tensor< 5 > const &	operator() (char const cl) const
	Returns a constant reference to the tensor of the specified site class. More...
Tensor< 5 > const &	operator() (Coord const coord) const
	Returns a constant reference to the tensor placed on the specified site. More...
Tensor< 5 > const &	operator() (Index const i) const
	Returns a constant reference to the tensor at the site with the specified linear offset. More...
State &	operator= (State &&other)
	Move assignment operator. More...
State &	operator= (State const &other)
	Copy assignment operator. More...
Tensor< 5 > &	operator[] (char const cl)
	Returns a writeable reference to the tensor of the specified site class. More...
Tensor< 5 > const &	operator[] (char const cl) const
	Returns a constant reference to the tensor of the specified site class. More...
Tensor< 5 > &	operator[] (Coord const coord)
	Returns a writeable reference to the tensor placed on the specified site. More...
Tensor< 5 > const &	operator[] (Coord const coord) const
	Returns a constant reference to the tensor placed on the specified site. More...
Tensor< 5 > &	operator[] (Index const i)
	Returns a writeable reference to the tensor at the site with the specified linear offset. More...
Tensor< 5 > const &	operator[] (Index const i) const
	Returns a constant reference to the tensor at the site with the specified linear offset. More...
Tensor< 3 > &	rmv ()
	Returns a writeable reference to the remover tensor. More...
Tensor< 3 > const &	rmv () const
	Returns a constant reference to the remover tensor. More...
template<typename Archive >
void	serialize (Archive &ar, const unsigned int in_version)
	Boost archiving. More...
	State ()=default
	Default ctor. More...
	State (int width_, int depth_, std::vector< char > site_class_)
	Standard ctor initialising the lattice and site classes as well as placing empty tensors on all sites. More...
	State (State &&other)
	Move ctor. More...
	State (State const &other)
	Copy ctor. More...
	State (State const &other, bool)
	Copy ctor which does not copy the CTM. More...
void	validate ()
	validates the state for matching bond dimensions. More...
double-layer handling.
Tensor< 3 > const &	getDLS (Coord const coord) const
	returns the splitting tensor of the double layer on the specified site. More...
Tensor< 3 > &	getDLS (Coord const coord)
	returns the splitting tensor of the double layer on the specified site. More...
Tensor< 3 > const &	getDLF (Coord const coord) const
	returns the fusing tensor of the double layer on the specified site. More...
Tensor< 3 > &	getDLF (Coord const coord)
	returns the fusing tensor of the double layer on the specified site. More...
Tensor< 4 > const &	getDLM (Coord const coord) const
	returns the complete double layer on the specified site. More...
Tensor< 4 > &	getDLM (Coord const coord)
	returns the complete double layer on the specified site. More...
Basis const &	getDLB (Coord const coord, Index const which) const
	Returns the standard single-layer basis used to construct the DL. More...
Basis &	getDLB (Coord const coord, Index const which)
	Returns the standard single-layer basis used to construct the DL. More...
Tensor< 2 > const &	getRMVDL () const
	returns the double layer of the removal tensor. More...
Tensor< 2 > &	getRMVDL ()
	returns the double layer of the removal tensor. More...
Basis const &	getRMVDLB (Index const which) const
	returns the standard single-layer basis used to construct the DL. More...
Basis &	getRMVDLB (Index const which)
	returns the standard single-layer basis used to construct the DL. More...
void	buildDL (Coord const coord)
	builds the double layer on the specified site. More...
void	buildRMVDL ()
	builds the double layer of the removal tensor. More...
void	invalidateDL (char const cl)
	invalidates the double layer of the specified site class. More...
void	buildDL ()
	builds the double layer on all sites. More...

Public Attributes
FullCTM	full_ctm
	currently-known full CTM for this state. More...

Static Public Attributes
static constexpr Index	bIdx {5}
	backwards index More...
static constexpr int	bInt {5}
	backwards index More...
static const std::array< Direction, 5 >	dirs
	Defines the directions of the bulk unit cell tensor legs. More...
static constexpr Index	fIdx {3}
	forward index More...
static constexpr int	fInt {3}
	forward index More...
static constexpr Index	lIdx {2}
	left index More...
static constexpr int	lInt {2}
	left index More...
static constexpr Index	pIdx {1}
	physical index More...
static constexpr int	pInt {1}
	physical index More...
static constexpr Index	rbIdx {3}
	backwards index of the remover More...
static constexpr int	rbInt {3}
	backwards index of the remover More...
static const std::array< Direction, 3 >	rdirs
	Defines the directions of the remover tensor legs. More...
static constexpr Index	rfIdx {2}
	forward index of the remover More...
static constexpr int	rfInt {2}
	forward index of the remover More...
static constexpr Index	rIdx {4}
	right index More...
static constexpr int	rInt {4}
	right index More...
static constexpr Index	rpIdx {1}
	physical index of the remover More...
static constexpr int	rpInt {1}
	physical index of the remover More...
static const std::string	uuid = "cc4c76ec-d234-4a0b-8c59-48c07847bd0b"
	uuid of the lattice class for serialisation More...
static constexpr int	version {2}
	version for boost serialisation More...

Private Attributes
int	depth {0}
	backwards/vertical/y extend More...
std::map< char, DLEntry >	double_layered
	contraction \( \bar{M}\cdot M \) for every tensor stored on the lattice. More...
Tensor< 3 >	remover
	the unique tensor in front of the (0,0) tensor which removes the target quantum number from the unit cell. More...
Tensor< 2 >	rmvdl
	Contraction for the remover tensor with auxiliary legs fused. More...
std::array< Basis, 3 >	rmvdlb
	Array of single-layer bases which were merged into the remover double-layer bases. More...
std::vector< char >	site_class
	the type of tensor situated on each site. More...
std::map< char, Tensor< 5 > >	tensors
	the tensor associated to each site class. More...
int	width {0}
	right/horizontal/x extend More...

Detailed Description

Represents an IPEPS state on a square lattice.

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

• inc/ipeps/state.h
• inc/ipeps/state.cpp