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We discuss a recent test of the performance of the kinetic energy partitionmethod (KEP) through its application to two separable quantum-mechanicalmodels. We argue that one of the benchmark models is exceedingly simple fortesting any realistic approximate method and that almost any reasonableapproach yields better results. In the second example our exact benchmarkeigenvalues disagree considerably with those chosen by the authors forcomparison, which casts doubts on the accuracy of their KEP approach.

annals of physics

Comment on: "Solving many-body Schr\"odinger equations with kinetic  energy partition method'', Ann. Phys. 388 (2018) 54-68 by Y-H. Chen and S. D.  Chao