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SyTen
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SyTen
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One worker in a MP-DMRG calculation. More...
#include <lbo_dmrg_worker.h>
Collaboration diagram for syten::MPS::DMRG::LBOWorker:Public Member Functions | |
| void | adaptAlpha (SRDef const preTrunc, SRDef const postTrunc) |
| Adapt the mixing factor alpha based on energy gain. More... | |
| void | calcContrLeft (Index const i) |
| Calculate a new left-contraction on the specified site. More... | |
| void | calcContrRight (Index const i) |
| Calculate a new right-contraction on the specified site. More... | |
| void | closeLog () |
| Helper to close our logfiles. More... | |
| bool | converged () |
| Return true if the conditions on convergence of the current stage are satisfied on this segment. More... | |
| std::pair< SRDef, SRDef > | energyM (Index const i, std::vector< Tensor< 4 > > const &trans_ops) |
| Return the energy estimate from the specific site. More... | |
| void | initLog () |
| Helper to initialise our logfiles. More... | |
| LBOWorker ()=default | |
| Default ctor needed for serialisation. More... | |
| LBOWorker (LBOState &&psi_, std::vector< Operator > &&op_, DMRGConfig &&conf_, Tensor< 2 > &, Index const lbound_, const Index rbound_, std::vector< LBOState > &&ortho_) | |
| Standard ctor, use to set up a DMRG worker. More... | |
| LBOWorker (LBOWorker &&other) | |
| Move ctor, steals cache files from source. More... | |
| template<class Archive > | |
| void | load (Archive &ar, const unsigned int in_version) |
| Load a worker object from a boost archive. More... | |
| template<typename Type1 , typename Type2 , typename Type3 , typename Type4 , typename Type5 > | |
| void | logIter (Type1 direction, Type2 stage, Type2 sweep, Type2 pos, Type5 type, Type3 esEnergy, Type2 esIter, Type3 esResidual, Type3 energy, Type3 truncation, Type3 alpha, Type2 n, Type2 s, Type2 r, Type2 t, Type2 b, Type4 esReason) |
| Log the data for a single iteration, potentially to both std::cout and the iteration logfile. More... | |
| template<typename... Args> | |
| void | logTrace (int level, Args &&... data) const |
| Log some tracing information. More... | |
| LBOWorker & | operator= (LBOWorker &&other) |
| Move assignment operator, c.f. Worker(Worker&&) More... | |
| void | reportConvergence () |
| Gives output on the current convergence status when called. More... | |
| template<class Archive > | |
| void | save (Archive &ar, const unsigned int v) const |
| Overload to satisfy Boost. More... | |
| template<class Archive > | |
| void | save (Archive &ar, const unsigned int) |
| Save a worker object to a boost archive. More... | |
| void | setErrorTolerance (SRDef const err) |
| Sets the error tolerance of the eigensolver according to the supplied truncation error of the last step. More... | |
| void | singleUpdate (Timer &timer) |
Updates a single site, measuring the time in timer. More... | |
| IterativeExit | solveLocalM (std::vector< Tensor< 4 > > &trans_ops) |
| Solve the local eigenvalue problem at the current position on the MPS tensor. More... | |
| IterativeExit | solveLocalV () |
| Solve the local eigenvalue problem at the current position on the LBO matrix. More... | |
| void | sweep () |
| Do one sweep in the correct direction, initialise some data at beginning of sweep. More... | |
| void | sweepLeft () |
| Sweeps to the left through the chain, updating and expanding each site. More... | |
| void | sweepRight () |
| Sweeps to the right through the chain, updating and expanding each site. More... | |
Public Attributes | |
| DMRGConfig | conf |
| our configuration object, also used to record some state More... | |
| std::vector< Cached< std::vector< Tensor< 3 > > > > | contrLeft |
| Contractions of the Hamiltonians and the state to the left of the current site. More... | |
| std::vector< Cached< std::vector< Tensor< 3 > > > > | contrRight |
| Contractions of the Hamiltonian and the state to the right of the current site. More... | |
| SweepDirection | dir |
| current sweeping direction More... | |
| std::ofstream | iterLog |
| output filestream for each iteration More... | |
| Index | lbound |
| leftmost site to be updated by this worker More... | |
| Index | length |
| the length of the full system, for convenience More... | |
| std::vector< Operator > | op |
| the relevant operators, want to minimise \(\langle \psi | \hat
\sum_i O_i | \psi \rangle / \langle \psi | \psi \rangle \) More... | |
| std::vector< LBOState > | ortho |
| Reference to vector of states against which we should orthogonalise. More... | |
| std::vector< Cached< std::vector< Tensor< 2 > > > > | orthoLeft |
| Contraction of the vectors in ortho with the current state to the left of the current site. More... | |
| std::vector< Cached< std::vector< Tensor< 2 > > > > | orthoRight |
| Contraction of the vectors in ortho with the current state to the right of the current site. More... | |
| Index | position |
| the currently-active site in our system, 0-indexed; trailing site in multi-site DMRG; at edge when sweep completes. More... | |
| LBOState | psi |
| the current state in our segment More... | |
| Index | rbound |
| rightmost site to be updated by this worker More... | |
| std::vector< Index > | site_positions |
| Position of input sites, only changed when dynamical reordering is in use. More... | |
| std::ofstream | traceLog |
| output filestream for the debug info More... | |
Static Public Attributes | |
| static constexpr unsigned int | version = 3 |
| Bump this if the data above changes. More... | |
One worker in a MP-DMRG calculation.
1.9.4