Comment on ``New ansatz for metric operator calculation in pseudo-Hermitian field theory''
arXiv:0906.4293 · doi:10.1103/PhysRevD.80.128701
Abstract
In a recent Brief Report by Shalaby a new first-order perturbative calculation of the metric operator for an scalar field theory is given. It is claimed that the result is an improvement on a previous calculation by Bender, Brody and Jones because it is local. Unfortunately Shalaby's calculation is not valid because of sign errors.
2 pages, no figures. This comment replaces the previous comment on the Brief Report by Shalaby. In the previous comment we pointed out that Shalaby's calculation failed in all but 2 space-time dimensions. We have subsequently found additional errors which mean that the calculation is not valid even in that case