Author Topic: The r_13 parameter in Stiwe3Potential  (Read 553 times)

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Offline lunna

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The r_13 parameter in Stiwe3Potential
« on: February 9, 2018, 03:35 »
Dear ATK Users

For the cutoff parameter in Stiwe3Potential (, r_0 and r_1 are the two cutoff distances for the 3-body contribution, I am confused what is r_13?


Offline Julian Schneider

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Re: The r_13 parameter in Stiwe3Potential
« Reply #1 on: February 9, 2018, 11:17 »
The parameter r_13 can be used to set an additional cutoff, i.e. if r_13 is set greater or equal than zero and if the distance between particle_type1 and particle_type3 is greater than r_13 , then the three body interaction term V_3 is neglected. By default r_13 is set to a negative value, which means it is ignored.