  Quantum Phase Estimation is one of the most useful quantum computing
algorithms for quantum chemistry and as such, significant effort has been
devoted to designing efficient implementations. In this article, we introduce
TFermion, a library designed to estimate the T-gate cost of such algorithms,
for an arbitrary molecule. As examples of usage, we estimate the T-gate cost of
a few simple molecules and compare the same Taylorization algorithms using
Gaussian and plane-wave basis.
