On 18/11/2010 3:28 AM, Nimesh Jain wrote:
Hi,

I am doing Replica Exchange (RE) simulations with 8 replicas 10 degree apart. My system has implicit solvent and there is only one molecule in the system (around 270 atoms). I am using Nose-Hover thermostat and tabulated potentials. When I do simulations with exchange frequency of 1 ns, the system blows up and the temperature goes to a few 10,000K. When I remove RE, the temperature fluctuations are +/- 20 degrees and they increase with time. Does anyone know what the problem is ? Let me know if you need any other info about the system I am simulating.

If one of your simulations is not stable on its own, then you've not equilibrated under your thermostat properly. What was your preparation protocol and final .mdp?

Mark
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