SPRING_K

SPRING_K = [real (array)] 

The parameter SPRING_K defines force constants $\kappa_{\mu}$ for the harmonic bias of the following form: $\tilde{V}(\xi_1,\dots,\xi_{M_8}) = \sum_{\mu=1}^{M}\frac{1}{2}\kappa_{\mu} (\xi_{\mu}(q)-\xi_{0\mu})^2 \;$ where the sum runs over all ($M_8$) coordinates the potential acts upon ($\xi_{\mu}(q)$), which are defined in the ICONST-file by setting the status to 8. The number of items defined via SPRING_K must be equal to $M_8$, otherwise the calculation terminates with an error message.