A single sentence description.
|Invariance with respect to the Inversion Operation (Inversion Symmetry)|
|Description||Check whether a model is invariant with respect to the inversion operation where each atom is moved along a straight line through the inversion center to a point of equal distance on the other side. This is satisfied for all inversion centers if the model is invariant to rigid-body translation, and has inversion symmetry about the origin. Invariance symmetry is expected from the properties of the quantum mechanics Hamiltonian operator. It should be true for any model that does not depend on an external field. The check is performed for a randomly distorted non-periodic body-centered cubic (BCC) cube base structure. Separate configurations are tested for each species supported by the model, as well as one containing a random distribution of all species. The energy and forces of each configuration are compared with those of the same configuration translated in a random direction by an irrational distance and then inverted through the origin. The energies must be the same and the forces must change sign. The verification check will pass if the energy of all configurations that the model is able to compute pass both tests. Configurations used for testing are provided as auxiliary files.|
A statement of applicability provided by the contributor, informing users of the intended use of this KIM Item.
Ellad B. Tadmor|
Ellad B. Tadmor|
|Published on KIM||2017|
|How to Cite||Click here to download this citation in BibTeX format.|
|Short KIM ID
The unique KIM identifier code.
|Extended KIM ID
The long form of the KIM ID including a human readable prefix (100 characters max), two underscores, and the Short KIM ID. Extended KIM IDs can only contain alpha-numeric characters (letters and digits) and underscores and must begin with a letter.
|KIM Item Type||Verification Check|
Properties as defined in kimspec.edn.
The name of the simulator as defined in kimspec.edn.
The programming languages used in the code and the percentage of the code written in each one.
Begin typing to select species to narrow the selection; multiple species may be selected.