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Fix the wrong definition of avnorm in applyExp #315

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Fix the wrong definition of avnorm in applyExp #315

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ffaadd8
add back time step adjusting
mingruyang Jan 5, 2020
174d434
Fix the wrong definition of avnorm
mingruyang Jan 6, 2020
ce64a0d
Fix wrong definition of avnorm
mingruyang Jan 6, 2020
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17 changes: 10 additions & 7 deletions itensor/iterativesolvers.h
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Original file line number Diff line number Diff line change
Expand Up @@ -988,15 +988,14 @@ applyExp(BigMatrixT const& H, ITensor& phi,
auto nmatvec = 0;

double beta = 0;
// Matrix-vector multiplication
if(debug_level >= 0)
nmatvec++;
H.product(v1, w);
for (int iter=0; iter < max_iter; ++iter)
{
int tmat_size=iter+1;
// Matrix-vector multiplication
if(debug_level >= 0)
nmatvec++;
H.product(v1, w);

double avnorm = norm(w);

double alpha = real(eltC(dag(w) * v1));
bigTmat(iter, iter) = alpha;
w -= alpha * v1;
Expand All @@ -1022,6 +1021,11 @@ applyExp(BigMatrixT const& H, ITensor& phi,
lanczos_vectors.push_back(v1);
bigTmat(iter+1, iter) = beta;
bigTmat(iter, iter+1) = beta;

if(debug_level >= 0)
nmatvec++;
H.product(v1, w);
double avnorm = norm(w);

// Convergence check
if (iter > 0)
Expand Down Expand Up @@ -1081,4 +1085,3 @@ applyExp(BigMatrixT const& H, ITensor& phi,
} //namespace itensor

#endif