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working on density matrix

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vijay gopal chilkuri 2016-12-21 18:43:41 +01:00
parent 86b4621ea9
commit 04acb8af41
1 changed files with 64 additions and 1 deletions
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65
src/ex1.c
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@ -28,6 +28,8 @@ int main(int argc,char **argv)
int natomax=700, iaa2, iaa;
int ideter[natomax];
int ideter2[natomax];
PetscScalar densmat[4][4]={0.0};
PetscScalar trace;
char const* const fileName = argv[1];
FILE* file = fopen(fileName, "r");
@ -347,6 +349,67 @@ int main(int argc,char **argv)
xymatfin = 0.0;
normfin = 0.0;
/*
* Calculating the one-particle density matrix
*/
for(kko=0;kko<=3;kko++){
for(kok=0;kok<=3;kok++){
for(ii=Istart;ii<=Iend;ii+=1){
iii = ii+1;
getdet_(&iii,ideter);
for(kkio=0;kkio<=7;kkio++){
ideter2[kkio]=ideter[kkio];
}
if(ideter[kko] != 3){
if(ideter[kok] == 3){
ideter2[kok]=ideter[kko];
ideter2[kko]=3;
adr_(ideter2, &iaa2);
iaa2 = iaa2 - 1;
Vec xiaa2; /* initial vector, destination vector */
VecScatter scatter; /* scatter context */
IS from, to; /* index sets that define the scatter */
PetscScalar *values;
int idx_from[] = {iaa2}, idx_to[] = {0};
VecCreateSeq(PETSC_COMM_SELF,1,&xiaa2);
ISCreateGeneral(PETSC_COMM_SELF,1,idx_from,PETSC_COPY_VALUES,&from);
ISCreateGeneral(PETSC_COMM_SELF,1,idx_to, PETSC_COPY_VALUES,&to);
VecScatterCreate(xr,from,xiaa2,to,&scatter);
VecScatterBegin(scatter,xr,xiaa2,INSERT_VALUES,SCATTER_FORWARD);
VecScatterEnd(scatter,xr,xiaa2, INSERT_VALUES,SCATTER_FORWARD);
VecGetArray(xiaa2,&values);
ISDestroy(&from);
ISDestroy(&to);
VecScatterDestroy(&scatter);
densmat[kko][kok]=densmat[kko][kok]+valxr[ii]*values[0];
if(1)printf("id = %d iaa2 = %d valxr = %18f\n", mpiid, iaa2, values[0]);
}
}
if(kko == kok && ideter[kko] != 3){
densmat[kko][kko]=densmat[kko][kko]+valxr[ii]*valxr[ii];
}
}
}
}
trace = 0.0;
if(!mpiid){
for(kko=0;kko<=3;kko++){
trace = trace + densmat[kko][kko];
}
for(kko=0;kko<=3;kko++){
for(kok=0;kok<=3;kok++){
densmat[kko][kok]=0.0;
}
}
}
/*
Compute the relative error associated to each eigenpair
*/
@ -362,7 +425,7 @@ int main(int argc,char **argv)
if (im!=0.0) {
ierr = PetscPrintf(PETSC_COMM_WORLD," %14f%+14fi %12g\n",(double)re,(double)im,(double)error);CHKERRQ(ierr);
} else {
ierr = PetscPrintf(PETSC_COMM_WORLD," %18f %12g %18f\n",(double)re,(double)error,(double)XS);CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD," %18f %12g %18f %18f\n",(double)re,(double)error,(double)XS,(double)trace);CHKERRQ(ierr);
}
}
ierr = PetscPrintf(PETSC_COMM_WORLD,"\n");CHKERRQ(ierr);