The CASINO forum

Dear all The last few days I have been refactoring script molden2qmc.py, trying to understand the algorithm of conversion. Normalization algorithm of MO-coefficients, and Cartesian->Spherical transformation remains unclear to me. Because the script is written in python, I did not break the tradition...

I found an interesting article of Sandro Sorella and Luca Capriotti http://www.luca-capriotti.net/pdfs/Physics/JCP_133_234111.pdf on the calculation of an arbitrarily large number of energy derivatives in QMC by using adjoint algorithmic differentiation. Whether implemented this algorithm in CASINO?...

Thanks for the help , Mike. Now all became clear. As I am doing QMC calculations only a few weeks, I wanted to make sure that the QMC programs work, as I guess. I assumed that the cusp condition should not change the energy, it turned out that this is not true. I want to add a few additional comment...

If you can help us and Mike D. with this we would be very grateful. Maintaining interfaces with large numbers of external codes that we know very little about is one of the biggest pains about being a QMC developer, as I'm sure you can appreciate. If the interface is well defined it usually does no...

So - try again with a smaller basis set containing only s , p , d functions and it will probably pass your tests. See the files in examples/generic/gauss_dfg in the CASINO distribution for further discussion - in particular the files README and RESULTS. Dear Mike, def2-SVP have no f-function in a '...

Hello Mike. I am a professional programmer, but in the last few years as a hobby I have been doing quantum-chemical calculations. Until recently, in my calculations, I used only the classical quantum-mechanical methods, such as HF, MP2, CI, CC, DFT and their multireference implementation. However, t...