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Results tagged with performance-tuning
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user 69749
Questions on optimizing Mathematica code for higher performance. This may mean faster execution, lower memory usage or both. Not to be confused with mathematical optimization.
4
votes
1
answer
121
views
Building projection operators efficiently
The projection operator $P$ is defined in quantum mechanics as $$
P=\sum_i^n \vert\psi_i\rangle \langle \psi_i\vert, $$
where $\vert\psi_i\rangle$ is a column vector and $(\langle
\psi_i\vert=(\ …
- 319
2
votes
1
answer
75
views
Efficient ways to generate a matrix from multiplying two elements of some matrix
I am working on the single particle entanglement entropy and in the process I have something like
Table[
Sum[
states[[eindex, spaceindex]] * states[[eindex, spaceindex2]],
{eindex …
- 319