void compress(double sweep_tol, int targetState, int baseState)
{
double last_fe = 10.e6;
double last_be = 10.e6;
double old_fe = 0.;
double old_be = 0.;
SweepParams sweepParams;
bool direction;
sweepParams.current_root() = -1;
//this is the warmup sweep, the baseState is used as the initial guess for the targetState
last_fe = SweepCompress::do_one(sweepParams, true, true, false, 0, targetState, baseState);
direction = false;
while ( true)
{
old_fe = last_fe;
old_be = last_be;
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
break;
last_be = SweepCompress::do_one(sweepParams, false, false, false, 0, targetState, baseState);
direction = true;
pout << "\t\t\t Finished Sweep Iteration "<<sweepParams.get_sweep_iter()<<endl;
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
break;
last_fe = SweepCompress::do_one(sweepParams, false, true, false, 0, targetState, baseState);
direction = false;
pout << "\t\t\t Finished Sweep Iteration "<<sweepParams.get_sweep_iter()<<endl;
}
//we finally canonicalize the targetState
//one has to canonicalize the wavefunction with atleast 3 sweeps, this is a quirk of the way
//we transform wavefunction
if (mpigetrank()==0) {
Sweep::InitializeStateInfo(sweepParams, !direction, targetState);
Sweep::InitializeStateInfo(sweepParams, direction, targetState);
Sweep::CanonicalizeWavefunction(sweepParams, !direction, targetState);
Sweep::CanonicalizeWavefunction(sweepParams, direction, targetState);
Sweep::CanonicalizeWavefunction(sweepParams, !direction, targetState);
Sweep::InitializeStateInfo(sweepParams, !direction, targetState);
Sweep::InitializeStateInfo(sweepParams, direction, targetState);
}
}
double SweepTwopdm::do_one(SweepParams &sweepParams, const bool &warmUp, const bool &forward, const bool &restart, const int &restartSize, int state)
{
Timer sweeptimer;
int integralIndex = 0;
if (dmrginp.hamiltonian() == BCS) {
pout << "Two PDM with BCS calculations is not implemented" << endl;
exit(0);
}
pout.precision(12);
SpinBlock system;
const int nroots = dmrginp.nroots();
std::vector<double> finalEnergy(nroots,0.);
std::vector<double> finalEnergy_spins(nroots,0.);
double finalError = 0.;
sweepParams.set_sweep_parameters();
// a new renormalisation sweep routine
pout << ((forward) ? "\t\t\t Starting renormalisation sweep in forwards direction" : "\t\t\t Starting renormalisation sweep in backwards direction") << endl;
pout << "\t\t\t ============================================================================ " << endl;
InitBlocks::InitStartingBlock (system,forward, sweepParams.current_root(), sweepParams.current_root(), sweepParams.get_forward_starting_size(), sweepParams.get_backward_starting_size(), restartSize, restart, warmUp, integralIndex);
if(!restart)
sweepParams.set_block_iter() = 0;
pout << "\t\t\t Starting block is :: " << endl << system << endl;
if (!restart)
SpinBlock::store (forward, system.get_sites(), system, sweepParams.current_root(), sweepParams.current_root()); // if restart, just restoring an existing block --
sweepParams.savestate(forward, system.get_sites().size());
bool dot_with_sys = true;
array_4d<double> twopdm(2*dmrginp.last_site(), 2*dmrginp.last_site(), 2*dmrginp.last_site(), 2*dmrginp.last_site());
twopdm.Clear();
save_twopdm_binary(twopdm, state, state);
for (; sweepParams.get_block_iter() < sweepParams.get_n_iters(); )
{
pout << "\n\t\t\t Block Iteration :: " << sweepParams.get_block_iter() << endl;
pout << "\t\t\t ----------------------------" << endl;
if (forward)
p1out << "\t\t\t Current direction is :: Forwards " << endl;
else
p1out << "\t\t\t Current direction is :: Backwards " << endl;
//if (SHOW_MORE) pout << "system block" << endl << system << endl;
if (dmrginp.no_transform())
sweepParams.set_guesstype() = BASIC;
else if (!warmUp && sweepParams.get_block_iter() != 0)
sweepParams.set_guesstype() = TRANSFORM;
else if (!warmUp && sweepParams.get_block_iter() == 0 &&
((dmrginp.algorithm_method() == TWODOT_TO_ONEDOT && dmrginp.twodot_to_onedot_iter() != sweepParams.get_sweep_iter()) ||
dmrginp.algorithm_method() != TWODOT_TO_ONEDOT))
sweepParams.set_guesstype() = TRANSPOSE;
else
sweepParams.set_guesstype() = BASIC;
p1out << "\t\t\t Blocking and Decimating " << endl;
SpinBlock newSystem;
BlockAndDecimate (sweepParams, system, newSystem, warmUp, dot_with_sys, state);
for(int j=0;j<nroots;++j)
pout << "\t\t\t Total block energy for State [ " << j <<
" ] with " << sweepParams.get_keep_states()<<" :: " << sweepParams.get_lowest_energy()[j] <<endl;
finalEnergy_spins = ((sweepParams.get_lowest_energy()[0] < finalEnergy[0]) ? sweepParams.get_lowest_energy_spins() : finalEnergy_spins);
finalEnergy = ((sweepParams.get_lowest_energy()[0] < finalEnergy[0]) ? sweepParams.get_lowest_energy() : finalEnergy);
finalError = max(sweepParams.get_lowest_error(),finalError);
system = newSystem;
pout << system<<endl;
SpinBlock::store (forward, system.get_sites(), system, sweepParams.current_root(), sweepParams.current_root());
p1out << "\t\t\t saving state " << system.get_sites().size() << endl;
++sweepParams.set_block_iter();
//sweepParams.savestate(forward, system.get_sites().size());
}
//for(int j=0;j<nroots;++j)
{int j = state;
pout << "\t\t\t Finished Sweep with " << sweepParams.get_keep_states() << " states and sweep energy for State [ " << j
<< " ] with Spin [ " << dmrginp.molecule_quantum().get_s() << " ] :: " << finalEnergy[j] << endl;
}
pout << "\t\t\t Largest Error for Sweep with " << sweepParams.get_keep_states() << " states is " << finalError << endl;
pout << "\t\t\t ============================================================================ " << endl;
int i = state, j = state;
//for (int j=0; j<=i; j++) {
load_twopdm_binary(twopdm, i, j);
//calcenergy(twopdm, i);
save_twopdm_text(twopdm, i, j);
save_spatial_twopdm_text(twopdm, i, j);
save_spatial_twopdm_binary(twopdm, i, j);
// update the static number of iterations
++sweepParams.set_sweep_iter();
ecpu = sweeptimer.elapsedcputime(); ewall = sweeptimer.elapsedwalltime();
pout << "\t\t\t Elapsed Sweep CPU Time (seconds): " << setprecision(3) << ecpu << endl;
pout << "\t\t\t Elapsed Sweep Wall Time (seconds): " << setprecision(3) << ewall << endl;
return finalEnergy[0];
}
void dmrg_stateSpecific(double sweep_tol, int targetState)
{
double last_fe = 10.e6;
double last_be = 10.e6;
double old_fe = 0.;
double old_be = 0.;
int ls_count=0;
SweepParams sweepParams;
int old_states=sweepParams.get_keep_states();
int new_states;
double old_error=0.0;
double old_energy=0.0;
// warm up sweep ...
bool direction;
int restartsize;
sweepParams.restorestate(direction, restartsize);
//initialize array of size m_maxiter or dmrginp.max_iter() for dw and energy
sweepParams.current_root() = targetState;
last_fe = Sweep::do_one(sweepParams, false, direction, true, restartsize);
while ((fabs(last_fe - old_fe) > sweep_tol) || (fabs(last_be - old_be) > sweep_tol) )
{
old_fe = last_fe;
old_be = last_be;
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
break;
last_be = Sweep::do_one(sweepParams, false, !direction, false, 0);
pout << "\t\t\t Finished Sweep Iteration "<<sweepParams.get_sweep_iter()<<endl;
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
break;
last_fe = Sweep::do_one(sweepParams, false, direction, false, 0);
new_states=sweepParams.get_keep_states();
pout << "\t\t\t Finished Sweep Iteration "<<sweepParams.get_sweep_iter()<<endl;
}
pout << "Converged Energy " << sweepParams.get_lowest_energy()[0]<< std::endl;
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter()) {
pout << "Maximum sweep iterations achieved " << std::endl;
}
//one has to canonicalize the wavefunction with atleast 3 sweeps, this is a quirk of the way
//we transform wavefunction
if (mpigetrank()==0) {
Sweep::InitializeStateInfo(sweepParams, !direction, targetState);
Sweep::InitializeStateInfo(sweepParams, direction, targetState);
Sweep::CanonicalizeWavefunction(sweepParams, !direction, targetState);
Sweep::CanonicalizeWavefunction(sweepParams, direction, targetState);
Sweep::CanonicalizeWavefunction(sweepParams, !direction, targetState);
Sweep::InitializeStateInfo(sweepParams, !direction, targetState);
Sweep::InitializeStateInfo(sweepParams, direction, targetState);
}
}
void dmrg(double sweep_tol)
{
double last_fe = 10.e6;
double last_be = 10.e6;
double old_fe = 0.;
double old_be = 0.;
SweepParams sweepParams;
int old_states=sweepParams.get_keep_states();
int new_states;
double old_error=0.0;
double old_energy=0.0;
// warm up sweep ...
bool dodiis = false;
int domoreIter = 0;
bool direction;
//this is regular dmrg calculation
if(!dmrginp.setStateSpecific()) {
sweepParams.current_root() = -1;
last_fe = Sweep::do_one(sweepParams, true, true, false, 0);
direction = false;
while ((fabs(last_fe - old_fe) > sweep_tol) || (fabs(last_be - old_be) > sweep_tol) ||
(dmrginp.algorithm_method() == TWODOT_TO_ONEDOT && dmrginp.twodot_to_onedot_iter()+1 >= sweepParams.get_sweep_iter()) )
{
old_fe = last_fe;
old_be = last_be;
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
break;
last_be = Sweep::do_one(sweepParams, false, false, false, 0);
direction = true;
pout << "\t\t\t Finished Sweep Iteration "<<sweepParams.get_sweep_iter()<<endl;
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
break;
//For obtaining the extrapolated energy
old_states=sweepParams.get_keep_states();
new_states=sweepParams.get_keep_states_ls();
last_fe = Sweep::do_one(sweepParams, false, true, false, 0);
direction = false;
new_states=sweepParams.get_keep_states();
pout << "\t\t\t Finished Sweep Iteration "<<sweepParams.get_sweep_iter()<<endl;
if (domoreIter == 2) {
dodiis = true;
break;
}
}
}
else { //this is state specific calculation
const int nroots = dmrginp.nroots();
bool direction=true;
int restartsize;
//sweepParams.restorestate(direction, restartsize);
//sweepParams.set_sweep_iter() = 0;
//sweepParams.set_restart_iter() = 0;
algorithmTypes atype;
pout << "STARTING STATE SPECIFIC CALCULATION "<<endl;
for (int i=0; i<nroots; i++) {
atype = dmrginp.algorithm_method();
dmrginp.set_algorithm_method() = ONEDOT;
sweepParams.current_root() = i;
p1out << "RUNNING GENERATE BLOCKS FOR STATE "<<i<<endl;
if (mpigetrank()==0) {
Sweep::InitializeStateInfo(sweepParams, direction, i);
Sweep::InitializeStateInfo(sweepParams, !direction, i);
Sweep::CanonicalizeWavefunction(sweepParams, direction, i);
Sweep::CanonicalizeWavefunction(sweepParams, !direction, i);
Sweep::CanonicalizeWavefunction(sweepParams, direction, i);
Sweep::InitializeStateInfo(sweepParams, direction, i);
Sweep::InitializeStateInfo(sweepParams, !direction, i);
}
for (int j=0; j<i ; j++) {
int integralIndex = 0;
Sweep::InitializeOverlapSpinBlocks(sweepParams, direction, i, j, integralIndex);
Sweep::InitializeOverlapSpinBlocks(sweepParams, !direction, i, j, integralIndex);
}
dmrginp.set_algorithm_method() = atype;
p1out << "RUNNING GENERATE BLOCKS FOR STATE "<<i<<endl;
SweepGenblock::do_one(sweepParams, false, !direction, false, 0, i, i);
sweepParams.set_sweep_iter() = 0;
sweepParams.set_restart_iter() = 0;
sweepParams.savestate(!direction, restartsize);
pout << "STATE SPECIFIC CALCULATION FOR STATE: "<<i<<endl;
dmrg_stateSpecific(sweep_tol, i);
pout << "STATE SPECIFIC CALCULATION FOR STATE: "<<i<<" FINSIHED"<<endl;
}
pout << "ALL STATE SPECIFIC CALCUALTIONS FINISHED"<<endl;
}
}
void responseSweep(double sweep_tol, int targetState, vector<int>& projectors, vector<int>& baseStates)
{
double last_fe = 1.e6;
double last_be = 1.e6;
double old_fe = 0.;
double old_be = 0.;
SweepParams sweepParams;
bool direction, warmUp, restart;
int restartSize=0;
direction = true; //forward
warmUp = true; //startup sweep
restart = false; //not a restart
sweepParams.current_root() = -1;
algorithmTypes atype = dmrginp.algorithm_method();
dmrginp.set_algorithm_method() = ONEDOT;
//the baseState is the initial guess for the targetState
if (FULLRESTART) {
sweepParams.restorestate(direction, restartSize);
direction = !direction;
dmrginp.setGuessState() = targetState;
last_fe = SweepResponse::do_one(sweepParams, warmUp, direction, restart, restartSize, targetState, projectors, baseStates);
bool tempdirection;
sweepParams.restorestate(tempdirection, restartSize);
sweepParams.calc_niter();
sweepParams.set_sweep_iter() = 0;
sweepParams.set_restart_iter() = 0;
sweepParams.savestate(tempdirection, restartSize);
}
else if (RESTART) {
dmrginp.set_algorithm_method() = atype;
warmUp = false;
restart = true;
sweepParams.restorestate(direction, restartSize);
last_fe = SweepResponse::do_one(sweepParams, warmUp, direction, restart, restartSize, targetState, projectors, baseStates);
}
else
last_fe = SweepResponse::do_one(sweepParams, warmUp, direction, restart, restartSize, targetState, projectors, baseStates);
dmrginp.set_algorithm_method() = atype;
restart = false;
restartSize = 0;
warmUp = false;
while ( true)
{
old_fe = last_fe;
old_be = last_be;
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
break;
last_be = SweepResponse::do_one(sweepParams, warmUp, !direction, restart, restartSize, targetState, projectors, baseStates);
p1out << "\t\t\t Finished Sweep Iteration "<<sweepParams.get_sweep_iter()<<endl;
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
break;
last_fe = SweepResponse::do_one(sweepParams, warmUp, direction, restart, restartSize, targetState, projectors, baseStates);
pout << "\t\t\t Finished Sweep Iteration "<<sweepParams.get_sweep_iter()<<endl;
}
}
void restart(double sweep_tol, bool reset_iter)
{
double last_fe = 100.;
double last_be = 100.;
double old_fe = 0.;
double old_be = 0.;
bool direction;
int restartsize;
SweepParams sweepParams;
bool dodiis = false;
int domoreIter = 2;
sweepParams.restorestate(direction, restartsize);
if (!dmrginp.setStateSpecific()) {
if(reset_iter) { //this is when you restart from the start of the sweep
sweepParams.set_sweep_iter() = 0;
sweepParams.set_restart_iter() = 0;
}
if (restartwarm)
last_fe = Sweep::do_one(sweepParams, true, direction, true, restartsize);
else
last_fe = Sweep::do_one(sweepParams, false, direction, true, restartsize);
while ((fabs(last_fe - old_fe) > sweep_tol) || (fabs(last_be - old_be) > sweep_tol) ||
(dmrginp.algorithm_method() == TWODOT_TO_ONEDOT && dmrginp.twodot_to_onedot_iter()+1 >= sweepParams.get_sweep_iter()) )
{
old_fe = last_fe;
old_be = last_be;
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
break;
last_be = Sweep::do_one(sweepParams, false, !direction, false, 0);
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
break;
last_fe = Sweep::do_one(sweepParams, false, direction, false, 0);
}
}
else { //this is state specific calculation
const int nroots = dmrginp.nroots();
bool direction;
int restartsize;
sweepParams.restorestate(direction, restartsize);
//initialize state and canonicalize all wavefunctions
int currentRoot = sweepParams.current_root();
for (int i=0; i<nroots; i++) {
sweepParams.current_root() = i;
if (mpigetrank()==0) {
Sweep::InitializeStateInfo(sweepParams, direction, i);
Sweep::InitializeStateInfo(sweepParams, !direction, i);
Sweep::CanonicalizeWavefunction(sweepParams, direction, i);
Sweep::CanonicalizeWavefunction(sweepParams, !direction, i);
Sweep::CanonicalizeWavefunction(sweepParams, direction, i);
}
}
//now generate overlaps with all the previous wavefunctions
for (int i=0; i<currentRoot; i++) {
sweepParams.current_root() = i;
if (mpigetrank()==0) {
for (int j=0; j<i; j++) {
int integralIndex = 0;
Sweep::InitializeOverlapSpinBlocks(sweepParams, !direction, i, j, integralIndex);
Sweep::InitializeOverlapSpinBlocks(sweepParams, direction, i, j, integralIndex);
}
}
}
sweepParams.current_root() = currentRoot;
if (sweepParams.current_root() <0) {
p1out << "This is most likely not a restart calculation and should be done without the restart command!!"<<endl;
p1out << "Aborting!!"<<endl;
exit(0);
}
pout << "RESTARTING STATE SPECIFIC CALCULATION OF STATE "<<sweepParams.current_root()<<" AT SWEEP ITERATION "<<sweepParams.get_sweep_iter()<<endl;
//this is so that the iteration is not one ahead after generate block for restart
--sweepParams.set_sweep_iter(); sweepParams.savestate(direction, restartsize);
for (int i=sweepParams.current_root(); i<nroots; i++) {
sweepParams.current_root() = i;
p1out << "RUNNING GENERATE BLOCKS FOR STATE "<<i<<endl;
if (mpigetrank()==0) {
Sweep::InitializeStateInfo(sweepParams, direction, i);
Sweep::InitializeStateInfo(sweepParams, !direction, i);
Sweep::CanonicalizeWavefunction(sweepParams, direction, i);
Sweep::CanonicalizeWavefunction(sweepParams, !direction, i);
Sweep::CanonicalizeWavefunction(sweepParams, direction, i);
for (int j=0; j<i ; j++) {
int integralIndex = 0;
Sweep::InitializeOverlapSpinBlocks(sweepParams, direction, i, j, integralIndex);
Sweep::InitializeOverlapSpinBlocks(sweepParams, !direction, i, j, integralIndex);
}
}
SweepGenblock::do_one(sweepParams, false, !direction, false, 0, i, i);
p1out << "STATE SPECIFIC CALCULATION FOR STATE: "<<i<<endl;
dmrg_stateSpecific(sweep_tol, i);
p1out << "STATE SPECIFIC CALCULATION FOR STATE: "<<i<<" FINSIHED"<<endl;
sweepParams.set_sweep_iter() = 0;
sweepParams.set_restart_iter() = 0;
sweepParams.savestate(!direction, restartsize);
}
p1out << "ALL STATE SPECIFIC CALCUALTIONS FINISHED"<<endl;
}
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter()){
pout << "\n\t\t\t Maximum sweep iterations achieved " << std::endl;
}
}
void SpinAdapted::mps_nevpt::type1::subspace_Va(int baseState)
{
double energy=0;
double overlap=0;
VaPerturber pb;
MPS::siteBlocks.clear();
int virtsize = dmrginp.spinAdapted()? dmrginp.virt_size():dmrginp.virt_size()*2;
int virtshift = dmrginp.spinAdapted()? dmrginp.core_size()+dmrginp.act_size(): (dmrginp.core_size()+dmrginp.act_size())*2;
//int virtsize = dmrginp.virt_size();
//int virtshift = dmrginp.core_size()+dmrginp.act_size();
for(int i=0; i< virtsize; i++){
double perturberEnergy=0;
dmrginp.calc_type() = MPS_NEVPT;
pb.init(i+virtshift);
pout << "Begin Va subspace with a = " << pb.orb(0)<<endl;
SweepParams sweepParams;
sweepParams.set_sweep_parameters();
sweepParams.current_root() = baseState;
//sweepParams.current_root() = -1;
//double last_fe = Startup(sweepParams, true, true, false, 0, pb, baseState);
Timer timer;
Startup(sweepParams, true, pb, baseState);
pout <<"Start up time :" << timer.elapsedwalltime();
//sweepParams.current_root() = baseState;
timer.start();
while(true)
{
do_one(sweepParams, false, false, false, 0, pb, baseState);
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
break;
do_one(sweepParams, false, true, false, 0, pb, baseState);
if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
{
cleanup(baseState, pb);
break;
}
}
pout <<"Sweep time :" << timer.elapsedwalltime();
// while ( true)
// {
// old_fe = last_fe;
// old_be = last_be;
// if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
// break;
// last_be = do_one(sweepParams, false, false, false, 0, pb, baseState);
// if (dmrginp.outputlevel() > 0)
// pout << "Finished Sweep Iteration "<<sweepParams.get_sweep_iter()<<endl;
//
// if(dmrginp.max_iter() <= sweepParams.get_sweep_iter())
// break;
//
// last_fe = do_one(sweepParams, false, true, false, 0, pb, baseState);
//
// if (dmrginp.outputlevel() > 0)
// pout << "Finished Sweep Iteration "<<sweepParams.get_sweep_iter()<<endl;
//
// }
//
// if (mpigetrank()==0) {
// bool direction = true;
// Sweep::InitializeStateInfo(sweepParams, !direction, pb.wavenumber(),pb.braquanta );
// Sweep::InitializeStateInfo(sweepParams, direction, pb.wavenumber(),pb.braquanta );
// Sweep::CanonicalizeWavefunction(sweepParams, !direction, pb.wavenumber(),pb.braquanta );
// Sweep::CanonicalizeWavefunction(sweepParams, direction, pb.wavenumber(),pb.braquanta );
// Sweep::CanonicalizeWavefunction(sweepParams, !direction, pb.wavenumber(),pb.braquanta );
// Sweep::InitializeStateInfo(sweepParams, !direction, pb.wavenumber(),pb.braquanta );
// Sweep::InitializeStateInfo(sweepParams, direction, pb.wavenumber(),pb.braquanta );
//
// }
MPS pbmps(pb.wavenumber());
double o, h;
dmrginp.calc_type() = DMRG;
timer.start();
calcHamiltonianAndOverlap(pbmps, h, o,pb);
pout <<"Calculate Expectation time :" << timer.elapsedwalltime();
if(!dmrginp.spinAdapted())
{
//In nonspinAdapted, alpha and beta have the results. Only one is neccessary.
o*=2;
h*=2;
i++;
}
if(o> NUMERICAL_ZERO){
double fock =dmrginp.spinAdapted()? v_1[0](2*(i+virtshift),2*(i+virtshift)): v_1[0](i+virtshift,i+virtshift);
//perturberEnergy = h/o+fock+perturber::CoreEnergy[0];
perturberEnergy = h/o+fock;
energy += o/(mps_nevpt::ZeroEnergy[baseState]- perturberEnergy) ;
//overlap +=o;
overlap += sqrt(o)/(mps_nevpt::ZeroEnergy[baseState]- perturberEnergy);
if (dmrginp.outputlevel() > 0){
pout << "Amplitude : " << sqrt(o)/(mps_nevpt::ZeroEnergy[baseState]- perturberEnergy) <<endl;
pout << "Ener(only CAS part) : " << h/o<<endl;
pout << "Energy : " << perturberEnergy<<endl;
pout << "Correction Energy: "<< o/(mps_nevpt::ZeroEnergy[baseState]- perturberEnergy)<<endl;
}
}
else{
if (dmrginp.outputlevel() > 0){
pout << "Amplitude : " << 0.0 <<endl;
pout << "Energy : " << 0.0<<endl;
}
}
}
pout << "Nevpt2 correction to the energy for state 0 in subspace Va is " << energy<<endl;;
pout << "Nevpt2 Va subspace perturber Amplitude : " << overlap<<endl;;
//pout << "Core Energy of nevpt2 " <<perturber::CoreEnergy[0]<<endl;
std::string file = str(boost::format("%s%s%d") % dmrginp.load_prefix() % "/Va_" % baseState);
std::fstream f(file,std::fstream::out);
f << energy <<endl;
f << overlap <<endl;
f.close();
}
double SpinAdapted::mps_nevpt::type1::do_one(SweepParams &sweepParams, const bool &warmUp, const bool &forward, const bool &restart, const int &restartSize, perturber& pb, int baseState)
{
int integralIndex = 0;
SpinBlock system;
system.nonactive_orb() = pb.orb();
const int nroots = dmrginp.nroots(sweepParams.get_sweep_iter());
std::vector<double> finalEnergy(nroots,-1.0e10);
std::vector<double> finalEnergy_spins(nroots,0.);
double finalError = 0.;
sweepParams.set_sweep_parameters();
// a new renormalisation sweep routine
if (forward)
if (dmrginp.outputlevel() > 0)
pout << "\t\t\t Starting sweep "<< sweepParams.set_sweep_iter()<<" in forwards direction"<<endl;
else
if (dmrginp.outputlevel() > 0)
{
pout << "\t\t\t Starting sweep "<< sweepParams.set_sweep_iter()<<" in backwards direction" << endl;
pout << "\t\t\t ============================================================================ " << endl;
}
InitBlocks::InitStartingBlock (system,forward, baseState, pb.wavenumber(), sweepParams.get_forward_starting_size(), sweepParams.get_backward_starting_size(), restartSize, restart, warmUp, integralIndex, pb.braquanta, pb.ketquanta);
if(!restart)
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, pb.wavenumber(), baseState); // 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 (restart)
{
if (forward && system.get_complementary_sites()[0] >= dmrginp.last_site()/2)
dot_with_sys = false;
if (!forward && system.get_sites()[0]-1 < dmrginp.last_site()/2)
dot_with_sys = false;
}
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
{
if (dmrginp.outputlevel() > 0)
{
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;
}
}
if (sweepParams.get_block_iter() != 0)
sweepParams.set_guesstype() = TRANSFORM;
else
sweepParams.set_guesstype() = TRANSPOSE;
if (dmrginp.outputlevel() > 0)
pout << "\t\t\t Blocking and Decimating " << endl;
SpinBlock newSystem; // new system after blocking and decimating
newSystem.nonactive_orb() = pb.orb();
//Need to substitute by:
// if (warmUp )
// Startup(sweepParams, system, newSystem, dot_with_sys, pb.wavenumber(), baseState);
// else {
// BlockDecimateAndCompress (sweepParams, system, newSystem, false, dot_with_sys, pb.wavenumber(), baseState);
// }
BlockDecimateAndCompress (sweepParams, system, newSystem, warmUp, dot_with_sys,pb, baseState);
//Need to substitute by?
system = newSystem;
if (dmrginp.outputlevel() > 0){
pout << system<<endl;
pout << system.get_braStateInfo()<<endl;
system.printOperatorSummary();
}
//system size is going to be less than environment size
if (forward && system.get_complementary_sites()[0] >= dmrginp.last_site()/2)
dot_with_sys = false;
if (!forward && system.get_sites()[0]-1 < dmrginp.last_site()/2)
dot_with_sys = false;
SpinBlock::store (forward, system.get_sites(), system, pb.wavenumber(), baseState);
syssites = system.get_sites();
if (dmrginp.outputlevel() > 0)
pout << "\t\t\t saving state " << syssites.size() << endl;
++sweepParams.set_block_iter();
#ifndef SERIAL
mpi::communicator world;
world.barrier();
#endif
sweepParams.savestate(forward, syssites.size());
if (dmrginp.outputlevel() > 0)
mcheck("at the end of sweep iteration");
}
//FIXME
//It does not seem necessary.
//when we are doing twodot, we still need to do the last sweep to make sure that the
//correctionVector and base wavefunction are propogated correctly across sweeps
// //especially when we switch from twodot to onedot algorithm
// if (!sweepParams.get_onedot() && !warmUp) {
// 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;
// }
// sweepParams.set_onedot() = true;
// sweepParams.set_env_add() = 0;
// bool dot_with_sys = true;
// WavefunctionCanonicalize(sweepParams, system, warmUp, dot_with_sys, targetState, baseState);
// sweepParams.set_onedot() = false;
// sweepParams.set_env_add() = 1;
// }
//
pout << "\t\t\t Largest Error for Sweep with " << sweepParams.get_keep_states() << " states is " << finalError << endl;
pout << "\t\t\t Largest overlap for Sweep with " << sweepParams.get_keep_states() << " states is " << finalEnergy[0] << endl;
sweepParams.set_largest_dw() = finalError;
pout << "\t\t\t ============================================================================ " << endl;
// update the static number of iterations
++sweepParams.set_sweep_iter();
return finalError;
}
void SpinAdapted::mps_nevpt::type1::BlockDecimateAndCompress (SweepParams &sweepParams, SpinBlock& system, SpinBlock& newSystem, const bool &useSlater, const bool& dot_with_sys, perturber& pb, int baseState)
{
int sweepiter = sweepParams.get_sweep_iter();
if (dmrginp.outputlevel() > 0) {
mcheck("at the start of block and decimate");
pout << "\t\t\t dot with system "<<dot_with_sys<<endl;
pout <<endl<< "\t\t\t Performing Blocking"<<endl;
}
// figure out if we are going forward or backwards
dmrginp.guessgenT -> start();
bool forward = (system.get_sites() [0] == 0);
SpinBlock systemDot;
SpinBlock environment, environmentDot, newEnvironment;
SpinBlock big;
environment.nonactive_orb() = pb.orb();
newEnvironment.nonactive_orb() = pb.orb();
int systemDotStart, systemDotEnd;
int environmentDotStart, environmentDotEnd, environmentStart, environmentEnd;
int systemDotSize = sweepParams.get_sys_add() - 1;
int environmentDotSize = sweepParams.get_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;
}
else
{
systemDotStart = dmrginp.spinAdapted() ? system.get_sites()[0] - 1 : (system.get_sites()[0])/2 - 1 ;
systemDotEnd = systemDotStart - systemDotSize;
environmentDotStart = systemDotEnd - 1;
environmentDotEnd = environmentDotStart - environmentDotSize;
}
systemDot = SpinBlock(systemDotStart, systemDotEnd, pb.orb());
environmentDot = SpinBlock(environmentDotStart, environmentDotEnd, pb.orb());
Sweep::makeSystemEnvironmentBigBlocks(system, systemDot, newSystem, environment, environmentDot, newEnvironment, big, sweepParams, dot_with_sys, useSlater, system.get_integralIndex(), pb.wavenumber(), baseState,pb.braquanta,pb.ketquanta);
//analyse_operator_distribution(big);
dmrginp.guessgenT -> stop();
dmrginp.multiplierT -> start();
std::vector<Matrix> rotatematrix;
if (dmrginp.outputlevel() > 0)
mcheck("");
if (dmrginp.outputlevel() > 0) {
if (!dot_with_sys && sweepParams.get_onedot()) { pout << "\t\t\t System Block"<<system; }
else pout << "\t\t\t System Block"<<newSystem;
pout << "\t\t\t Environment Block"<<newEnvironment<<endl;
pout << "\t\t\t Solving wavefunction "<<endl;
}
std::vector<Wavefunction> solution; solution.resize(1);
std::vector<Wavefunction> outputState; outputState.resize(1);
DiagonalMatrix e;
//read the 0th wavefunction which we keep on the ket side because by default the ket stateinfo is used to initialize wavefunction
//also when you use spinblock operators to multiply a state, it does so from the ket side i.e. H|ket>
//GuessWave::guess_wavefunctions(solution, e, big, sweepParams.set_guesstype(), sweepParams.get_onedot(), dot_with_sys, 0.0, baseState);
GuessWave::guess_wavefunctions(solution[0], e, big, sweepParams.set_guesstype(), sweepParams.get_onedot(), baseState, dot_with_sys, 0.0);
#ifndef SERIAL
mpi::communicator world;
broadcast(world, solution, 0);
#endif
outputState[0].AllowQuantaFor(big.get_leftBlock()->get_braStateInfo(), big.get_rightBlock()->get_braStateInfo(),pb.braquanta);
outputState[0].set_onedot(sweepParams.get_onedot());
outputState[0].Clear();
if (pb.type() == TwoPerturbType::Va)
big.multiplyCDD_sum(solution[0],&(outputState[0]),MAX_THRD);
if (pb.type() == TwoPerturbType::Vi)
big.multiplyCCD_sum(solution[0],&(outputState[0]),MAX_THRD);
//davidson_f(solution[0], outputState[0]);
SpinBlock newbig;
if (sweepParams.get_onedot() && !dot_with_sys)
{
InitBlocks::InitNewSystemBlock(system, systemDot, newSystem, baseState, pb.wavenumber(), systemDot.size(), dmrginp.direct(), system.get_integralIndex(), DISTRIBUTED_STORAGE, false, true,NO_PARTICLE_SPIN_NUMBER_CONSTRAINT,pb.braquanta,pb.ketquanta);
InitBlocks::InitBigBlock(newSystem, environment, newbig,pb.braquanta,pb.ketquanta);
Wavefunction tempwave = outputState[0];
GuessWave::onedot_shufflesysdot(big.get_braStateInfo(), newbig.get_braStateInfo(), outputState[0], tempwave);
outputState[0] = tempwave;
tempwave = solution[0];
GuessWave::onedot_shufflesysdot(big.get_ketStateInfo(), newbig.get_ketStateInfo(), solution[0], tempwave);
solution[0] = tempwave;
big.get_rightBlock()->clear();
big.clear();
}
else
newbig = big;
DensityMatrix bratracedMatrix(newSystem.get_braStateInfo());
bratracedMatrix.allocate(newSystem.get_braStateInfo());
//bratracedMatrix.makedensitymatrix(outputState, newbig, dmrginp.weights(sweepiter), 0.0, 0.0, true);
bratracedMatrix.makedensitymatrix(outputState, newbig, std::vector<double>(1,1.0), 0.0, 0.0, true);
if (sweepParams.get_noise() > NUMERICAL_ZERO) {
pout << "adding noise "<<trace(bratracedMatrix)<<" "<<sweepiter<<" "<<dmrginp.weights(sweepiter)[0]<<endl;
bratracedMatrix.add_onedot_noise_forCompression(solution[0], newbig, sweepParams.get_noise()*max(1.0,trace(bratracedMatrix)));
if (trace(bratracedMatrix) <1e-14)
bratracedMatrix.SymmetricRandomise();
pout << "after noise "<<trace(bratracedMatrix)<<" "<<sweepParams.get_noise()<<endl;
}
environment.clear();
newEnvironment.clear();
std::vector<Matrix> brarotateMatrix, ketrotateMatrix;
LoadRotationMatrix (newSystem.get_sites(), ketrotateMatrix, baseState);
double braerror;
if (!mpigetrank()) {
braerror = makeRotateMatrix(bratracedMatrix, brarotateMatrix, sweepParams.get_keep_states(), sweepParams.get_keep_qstates());
}
#ifndef SERIAL
broadcast(world, ketrotateMatrix, 0);
broadcast(world, brarotateMatrix, 0);
#endif
if (dmrginp.outputlevel() > 0)
pout << "\t\t\t Total bra discarded weight "<<braerror<<endl<<endl;
sweepParams.set_lowest_error() = braerror;
SaveRotationMatrix (newbig.get_leftBlock()->get_sites(), brarotateMatrix, pb.wavenumber());
//FIXME
//It is neccessary for twodot algorithm to save baseState wavefuntion.
//I do not know why.
solution[0].SaveWavefunctionInfo (newbig.get_ketStateInfo(), newbig.get_leftBlock()->get_sites(), baseState);
outputState[0].SaveWavefunctionInfo (newbig.get_braStateInfo(), newbig.get_leftBlock()->get_sites(), pb.wavenumber());
//TODO
//Why do I need this?
//They should have been consistent.
// solution[0].SaveWavefunctionInfo (newbig.get_ketStateInfo(), newbig.get_leftBlock()->get_sites(), baseState);
// SaveRotationMatrix (newbig.get_leftBlock()->get_sites(), ketrotateMatrix, baseState);
if (dmrginp.outputlevel() > 0)
pout <<"\t\t\t Performing Renormalization "<<endl;
newSystem.transform_operators(brarotateMatrix, ketrotateMatrix);
if (dmrginp.outputlevel() > 0)
mcheck("after rotation and transformation of block");
if (dmrginp.outputlevel() > 0){
pout << *dmrginp.guessgenT<<" "<<*dmrginp.multiplierT<<" "<<*dmrginp.operrotT<< " "<<globaltimer.totalwalltime()<<" timer "<<endl;
pout << *dmrginp.makeopsT<<" makeops "<<endl;
pout << *dmrginp.datatransfer<<" datatransfer "<<endl;
pout <<"oneindexopmult twoindexopmult Hc couplingcoeff"<<endl;
pout << *dmrginp.oneelecT<<" "<<*dmrginp.twoelecT<<" "<<*dmrginp.hmultiply<<" "<<*dmrginp.couplingcoeff<<" hmult"<<endl;
pout << *dmrginp.buildsumblock<<" "<<*dmrginp.buildblockops<<" build block"<<endl;
pout << "addnoise S_0_opxop S_1_opxop S_2_opxop"<<endl;
pout << *dmrginp.addnoise<<" "<<*dmrginp.s0time<<" "<<*dmrginp.s1time<<" "<<*dmrginp.s2time<<endl;
}
}
double SweepGenblock::do_one(SweepParams &sweepParams, const bool &warmUp, const bool &forward, const bool &restart, const int &restartSize, int stateA, int stateB)
{
Timer sweeptimer;
int integralIndex = 0;
SpinBlock system;
const int nroots = dmrginp.nroots();
std::vector<double> finalEnergy(nroots,0.);
std::vector<double> finalEnergy_spins(nroots,0.);
double finalError = 0.;
sweepParams.set_sweep_parameters();
// a new renormalisation sweep routine
pout << ((forward) ? "\t\t\t Starting renormalisation sweep in forwards direction" : "\t\t\t Starting renormalisation sweep in backwards direction") << endl;
pout << "\t\t\t ============================================================================ " << endl;
InitBlocks::InitStartingBlock (system,forward, stateA, stateB, sweepParams.get_forward_starting_size(), sweepParams.get_backward_starting_size(), restartSize, restart, warmUp, integralIndex);
if(!restart)
sweepParams.set_block_iter() = 0;
p2out << "\t\t\t Starting block is :: " << endl << system << endl;
//if (!restart)
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;
if (restart)
{
if (forward && system.get_complementary_sites()[0] >= dmrginp.last_site()/2)
dot_with_sys = false;
if (!forward && system.get_sites()[0]-1 < dmrginp.last_site()/2)
dot_with_sys = false;
}
for (; sweepParams.get_block_iter() < sweepParams.get_n_iters(); )
{
pout << "\n\t\t\t Block Iteration :: " << sweepParams.get_block_iter() << endl;
pout << "\t\t\t ----------------------------" << endl;
if (forward)
{ p1out << "\t\t\t Current direction is :: Forwards " << endl; }
else
{ p1out << "\t\t\t Current direction is :: Backwards " << endl; }
//if (SHOW_MORE) pout << "system block" << endl << system << endl;
if (dmrginp.no_transform())
sweepParams.set_guesstype() = BASIC;
else if (!warmUp && sweepParams.get_block_iter() != 0)
sweepParams.set_guesstype() = TRANSFORM;
else if (!warmUp && sweepParams.get_block_iter() == 0 &&
((dmrginp.algorithm_method() == TWODOT_TO_ONEDOT && dmrginp.twodot_to_onedot_iter() != sweepParams.get_sweep_iter()) ||
dmrginp.algorithm_method() != TWODOT_TO_ONEDOT))
sweepParams.set_guesstype() = TRANSPOSE;
else
sweepParams.set_guesstype() = BASIC;
p1out << "\t\t\t Blocking and Decimating " << endl;
SpinBlock newSystem;
BlockAndDecimate (sweepParams, system, newSystem, warmUp, dot_with_sys, stateA, stateB);
system = newSystem;
//system size is going to be less than environment size
if (forward && system.get_complementary_sites()[0] >= dmrginp.last_site()/2)
dot_with_sys = false;
if (!forward && system.get_sites()[0]-1 < dmrginp.last_site()/2)
dot_with_sys = false;
SpinBlock::store (forward, system.get_sites(), system, stateA, stateB);
p1out << "\t\t\t saving state " << system.get_sites().size() << endl;
++sweepParams.set_block_iter();
//if (sweepParams.get_onedot())
//pout << "\t\t\tUsing one dot algorithm!!"<<endl;
sweepParams.savestate(forward, system.get_sites().size());
}
pout << "\t\t\t Finished Generate-Blocks Sweep. " << endl;
pout << "\t\t\t ============================================================================ " << endl;
// update the static number of iterations
++sweepParams.set_sweep_iter();
ecpu = sweeptimer.elapsedcputime(); ewall = sweeptimer.elapsedwalltime();
pout << "\t\t\t Elapsed Sweep CPU Time (seconds): " << setprecision(3) << ecpu << endl;
pout << "\t\t\t Elapsed Sweep Wall Time (seconds): " << setprecision(3) << ewall << endl;
return finalEnergy[0];
}
