The authors use a genetic algorithm to reoptimize STO-kG minimal basis sets up to k=11, yielding MSTO-kG bases that improve atomic FCI energies for H, Li, Be and some molecules, with fewer qubits than larger bases.
Using other choices would change the gate counts but not the overall observed trends
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Better accuracy with fewer qubits: Single-particle basis set optimization for quantum chemistry on quantum computers
The authors use a genetic algorithm to reoptimize STO-kG minimal basis sets up to k=11, yielding MSTO-kG bases that improve atomic FCI energies for H, Li, Be and some molecules, with fewer qubits than larger bases.