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SyTen
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SyTen
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Represents one symmetry-protected block of a full tensor. More...
#include <tensorblock.h>
Collaboration diagram for syten::TensorBlock< rank >:Public Types | |
| typedef SparseTensor< rank, CDef > | CGC |
| The sparse tensor type for the sparse/CGC tensors. More... | |
| typedef std::vector< CGC > | CGCSet |
| Type of the set of all CGC tensors. More... | |
| typedef std::array< RDef, rank *SYTEN_MAX_SYM *SYTEN_MAX_DEG > | Cmps |
| Type of the set of labels used for comparison. More... | |
| typedef DenseTensor< rank, SDef > | Dense |
| The standard dense tensor type for the reduced tensor. More... | |
| typedef GenericDenseTensor< rank, SDef > | DenseStorage |
| Storage type for the reduced, dense tensor. More... | |
| typedef std::array< Sector, rank > | Sym |
| Type of the transformation definition of all legs in all symmetries. More... | |
Public Member Functions | |
| MemoryUsage::MemorySize | allocSize () const |
| allocSize()/memory_size.h support. More... | |
| void | make_dense_cuda () |
| Brings the dense tensor into CUDA form. More... | |
| void | make_dense_standard () |
| Brings the dense tensor into standard form. More... | |
| void | maybe_make_dense_cuda () |
| Conditionally transforms the stored dense tensor into a CUDA dense tensor if CUDA support is compiled in, at least one CUDA device is enabled and the tensor is larger than the CUDA threshold. More... | |
| TensorBlock< rank > | return_as_dense_standard () const |
Returns a copy of this with the dense tensor in standard dense format. More... | |
| TensorBlock ()=default | |
| Default ctor, mainly for boost serialisation. More... | |
| template<typename TypeDense , typename TypeSym > | |
| TensorBlock (TypeDense &&m_, TypeSym &&s_) | |
| Standard ctor, default-initialises the CGC blocks (no non-abelian quantum numbers). More... | |
| template<typename TypeDense , typename TypeSym , typename TypeCGC > | |
| TensorBlock (TypeDense &&m_, TypeSym &&s_, TypeCGC &&c_) | |
| Standard ctor. More... | |
Symmetry sector information | |
| std::array< Sector, rank > const & | trans () const |
| Returns the symmetry sector information of all legs. More... | |
| Sector const & | trans (Index leg) const |
| Returns the symmetry sector information on the specified leg. More... | |
| Rep const & | trans (Index leg, Index sym) const |
| Returns the irrep of the specified symmetry on the specified leg. More... | |
| std::array< Sector, rank > && | trans_m () |
| Returns the symmetry sector information of all legs as rvalue. More... | |
| Sector && | trans_m (Index d) |
| Returns the symmetry sector information of the specified leg as rvalue. More... | |
| void | setTransform (std::array< Sector, rank > &&rep) |
| Sets the transformation of all legs and updates the fast comparison list. More... | |
| Index | numSymmetries () const |
| Index | numCGC () const |
Comparison of sectors with other tensor blocks | |
| bool | eqTrans (TensorBlock const &other) const |
Returns true if *this and other transform equally on all legs. More... | |
| template<Rank orank> | |
| bool | eqTrans (TensorBlock< orank > const &other, Index const ileg, Index ioleg) const |
Returns true if the leg-th leg of *this and the oleg-th leg of other transform equally. More... | |
Boost serialisation support | |
| template<class Archive > | |
| void | save (Archive &ar, const unsigned int) const |
| Serialising. More... | |
| template<class Archive > | |
| void | load (Archive &ar, const unsigned int in_version) |
| Deserialising. More... | |
Public Attributes | |
| CGCSet | c |
| The set of all CGC spaces. More... | |
| Cmps | cmps |
| A list of all labels on all legs, first all labels of the first leg, then all labels on the second leg etc. More... | |
| Index | cmps_size_per_leg = 0 |
| The number of entries in Cmps per leg. More... | |
| bool | isZero = true |
| True if the tensor is identically zero. More... | |
| DenseStorage | m |
| The dense tensor/reduced multiplet. More... | |
Static Public Attributes | |
| static constexpr unsigned int | version = 3 |
| Boost serialisation version. More... | |
Private Member Functions | |
| void | updateTransform () |
| Call this to update the fast symmetry representation cmps after changing s. More... | |
Private Attributes | |
| Sym | s |
| The actual irreps on each leg and symmetry, call updateTransform() after changing this. More... | |
Represents one symmetry-protected block of a full tensor.
Consists of a reduced, dense tensor \( m \) and a set of CGC-tensors \( c_i \) , one for each symmetry. The full block \( b \) would be the tensor product \( b = m \otimes \left( \bigotimes_{i=1}^{\mathrm{\# Sym}} c_i \right) \).
The block transforms irreducibly on each leg in each symmetry sector. To avoid comparing large numbers of representations, we construct an optimised representation (namely just the set of labels) of the transformation properties. For this reason, the symmetry transform is not directly accessible and one has to use setter and getter functions. Sorry.
1.9.4