Comment on ``New ansatz for metric operator calculation in pseudo-Hermitian field theory''

摘要

In a recent Brief Report by Shalaby a new first-order perturbativecalculation of the metric operator for an $i\phi^3$ scalar field theory isgiven. It is claimed that the result is an improvement on a previouscalculation by Bender, Brody and Jones because it is local. UnfortunatelyShalaby's calculation is not valid because of sign errors.