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00925njm 22002777a 4500 dc Moreno Casares, Pablo Antonio author Campos, Roberto author Martín-Delgado Alcántara, Miguel Ángel author 2022-07-13 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. 2521-327X 10.22331/q-2022-07-20-768 https://hdl.handle.net/20.500.14352/71931 http://dx.doi.org/10.22331/q-2022-07-20-768 https://quantum-journal.org/ TFermion: a non-Clifford gate cost assessment library of quantum phase estimation algorithms for quantum chemistry