time-step and time-steps-increment

[David Cortes]

Hi, 

what's the difference between sim:time-step and sim:time-steps-increment ? 

As I have seen in my simulations, the increment is reflected in the output rate of the data, but I'm not completely sure if this have an effect on the dynamics.

I think that sim:time-step refers directly to the integrator step, which is ~1e-15, but I would like to confirm this.

Regards,

David 

[Jung-Wei Liao]

Hi

I know that for the calculation of dynamic hysteresis loops, the product of the sim:time-step and the sim:loop-time-steps is the total integration time at each field step. The product of the total integration time and the total field steps is the time of the pulsed magnetic field for a full loop.

I think the sim:time-steps-increment is for the Monte-Carlo calculation, but I am not very sure about the meaning. When I calculate the Curie temperature by the method of Monte-Carlo I set the sim:time-steps-increment equal to 1. 

Best

Jung-Wei

--
You received this message because you are subscribed to the Google Groups "Vampire Users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to vampire-user...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[richard....@gmail.com]

Hi David,

Indeed - the time-step is the actual time step for the numerical integration, eg 1fs. time-step-increment is the number of time steps between collecting statistics and/or outputting data. So as Jung-Wei pointed out for Monte Carlo simulation time-step-increment is the number of steps between collecting samples for statistics purposes. Depending on whether you believe in collecting correlated or uncorrelated statistical samples this can be 1 or a small number, eg 5. For spin dynamics you often don't want full fs time resolution so time-step-increment reduces the amount of data outputted to screen or the output file.

Richard.