Quantum chemistry beyond Born-Oppenheimer approximation on a quantum computer: a simulated phase estimation study

preprint2016arXivOpen access

Abstract

We present an efficient quantum algorithm for beyond-Born-Oppenheimer molecular energy computations. Our approach combines the quantum full configuration interaction method with the nuclear orbital plus molecular orbital (NOMO) method. We give the details of the algorithm and demonstrate its performance by classical simulations. Two isotopomers of the hydrogen molecule (H2_2, HT) were chosen as representative examples and calculations of the lowest rotationless vibrational transition energies were simulated.

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