//before you start optimizing each state you want to initalize all the overlap matrices
void Sweep::InitializeOverlapSpinBlocks(SweepParams &sweepParams, const bool &forward, int stateA, int stateB)
{
SpinBlock system;
sweepParams.set_sweep_parameters();
if (forward)
pout << "\t\t\t Starting sweep "<< sweepParams.set_sweep_iter()<<" in forwards direction"<<endl;
else
pout << "\t\t\t Starting sweep "<< sweepParams.set_sweep_iter()<<" in backwards direction" << endl;
pout << "\t\t\t ============================================================================ " << endl;
int restartSize = 0; bool restart = false, warmUp = false;
InitBlocks::InitStartingBlock (system,forward, stateA, stateB, sweepParams.get_forward_starting_size(), sweepParams.get_backward_starting_size(), restartSize, restart, warmUp);
sweepParams.set_block_iter() = 0;
if (dmrginp.outputlevel() > 0)
pout << "\t\t\t Starting block is :: " << endl << system << endl;
SpinBlock::store (forward, system.get_sites(), system, stateA, stateB); // if restart, just restoring an existing block --
sweepParams.savestate(forward, system.get_sites().size());
bool dot_with_sys = true;
vector<int> syssites = system.get_sites();
if (dmrginp.outputlevel() > 0)
mcheck("at the very start of sweep"); // just timer
for (; sweepParams.get_block_iter() < sweepParams.get_n_iters(); ) // get_n_iters() returns the number of blocking iterations needed in one sweep
{
pout << "\t\t\t Block Iteration :: " << sweepParams.get_block_iter() << endl;
pout << "\t\t\t ----------------------------" << endl;
if (dmrginp.outputlevel() > 0) {
if (forward) pout << "\t\t\t Current direction is :: Forwards " << endl;
else pout << "\t\t\t Current direction is :: Backwards " << endl;
}
SpinBlock systemDot, environmentDot;
int systemDotStart, systemDotEnd;
int systemDotSize = sweepParams.get_sys_add() - 1;
if (forward)
{
systemDotStart = dmrginp.spinAdapted() ? *system.get_sites().rbegin () + 1 : (*system.get_sites().rbegin ())/2 + 1 ;
systemDotEnd = systemDotStart + systemDotSize;
}
else
{
systemDotStart = dmrginp.spinAdapted() ? system.get_sites()[0] - 1 : (system.get_sites()[0])/2 - 1 ;
systemDotEnd = systemDotStart - systemDotSize;
}
systemDot = SpinBlock(systemDotStart, systemDotEnd, true);
SpinBlock newSystem; // new system after blocking and decimating
newSystem.initialise_op_array(OVERLAP, false);
newSystem.setstoragetype(DISTRIBUTED_STORAGE);
newSystem.BuildSumBlock (NO_PARTICLE_SPIN_NUMBER_CONSTRAINT, system, systemDot);
std::vector<Matrix> brarotateMatrix, ketrotateMatrix;
LoadRotationMatrix(newSystem.get_sites(), brarotateMatrix, stateA);
LoadRotationMatrix(newSystem.get_sites(), ketrotateMatrix, stateB);
newSystem.transform_operators(brarotateMatrix, ketrotateMatrix);
system = newSystem;
if (dmrginp.outputlevel() > 0){
pout << system<<endl;
}
SpinBlock::store (forward, system.get_sites(), system, stateA, stateB);
++sweepParams.set_block_iter();
sweepParams.savestate(forward, syssites.size());
if (dmrginp.outputlevel() > 0)
mcheck("at the end of sweep iteration");
}
pout << "\t\t\t ============================================================================ " << endl;
// update the static number of iterations
return ;
}
void SpinAdapted::InitBlocks::InitNewOverlapEnvironmentBlock(SpinBlock &environment, SpinBlock& environmentDot, SpinBlock &newEnvironment,
const SpinBlock &system, SpinBlock &systemDot, int leftState, int rightState,
const int &sys_add, const int &env_add, const bool &forward, int integralIndex,
const bool &onedot, const bool& dot_with_sys, int constraint)
{
// now initialise environment Dot
int systemDotStart, systemDotEnd, environmentDotStart, environmentDotEnd, environmentStart, environmentEnd;
int systemDotSize = sys_add - 1;
int environmentDotSize = env_add - 1;
if (forward)
{
systemDotStart = dmrginp.spinAdapted() ? *system.get_sites().rbegin () + 1 : (*system.get_sites().rbegin ())/2 + 1 ;
systemDotEnd = systemDotStart + systemDotSize;
environmentDotStart = systemDotEnd + 1;
environmentDotEnd = environmentDotStart + environmentDotSize;
environmentStart = environmentDotEnd + 1;
environmentEnd = dmrginp.spinAdapted() ? dmrginp.last_site() - 1 : dmrginp.last_site()/2 - 1;
}
else
{
systemDotStart = dmrginp.spinAdapted() ? system.get_sites()[0] - 1 : (system.get_sites()[0])/2 - 1 ;
systemDotEnd = systemDotStart - systemDotSize;
environmentDotStart = systemDotEnd - 1;
environmentDotEnd = environmentDotStart - environmentDotSize;
environmentStart = environmentDotEnd - 1;
environmentEnd = 0;
}
std::vector<int> environmentSites;
environmentSites.resize(abs(environmentEnd - environmentStart) + 1);
for (int i = 0; i < abs(environmentEnd - environmentStart) + 1; ++i) *(environmentSites.begin () + i) = min(environmentStart,environmentEnd) + i;
p2out << "\t\t\t Restoring block of size " << environmentSites.size () << " from previous iteration" << endl;
if(dot_with_sys && onedot) {
newEnvironment.set_integralIndex() = integralIndex;
SpinBlock::restore (!forward, environmentSites, newEnvironment, leftState, rightState);
}
else {
environment.set_integralIndex() = integralIndex;
SpinBlock::restore (!forward, environmentSites, environment, leftState, rightState);
}
if (dmrginp.outputlevel() > 0)
mcheck("");
// now initialise newEnvironment
if (!dot_with_sys || !onedot)
{
newEnvironment.set_integralIndex() = integralIndex;
newEnvironment.initialise_op_array(OVERLAP, false);
//newEnvironment.set_op_array(OVERLAP) = boost::shared_ptr<Op_component<Overlap> >(new Op_component<Overlap>(false));
newEnvironment.setstoragetype(DISTRIBUTED_STORAGE);
newEnvironment.BuildSumBlock (constraint, environment, environmentDot);
p2out << "\t\t\t Environment block " << endl << environment << endl;
environment.printOperatorSummary();
p2out << "\t\t\t NewEnvironment block " << endl << newEnvironment << endl;
newEnvironment.printOperatorSummary();
}
else {
p2out << "\t\t\t Environment block " << endl << newEnvironment << endl;
newEnvironment.printOperatorSummary();
}
}
