A VQE-based quantum algorithm recovers the spectrum of the inner-region Hamiltonian for electron-H2 scattering on a simulator and encodes the R-matrix boundary amplitudes in the optimized circuit parameters.
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Generalizes iterative phase estimation to randomized Hamiltonians per step plus importance sampling, yielding fewer terms and sometimes fewer qubits for gapped chemical Hamiltonians.
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Electron-molecule scattering via R-matrix variational algorithms on a quantum computer
A VQE-based quantum algorithm recovers the spectrum of the inner-region Hamiltonian for electron-H2 scattering on a simulator and encodes the R-matrix boundary amplitudes in the optimized circuit parameters.
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Phase estimation with randomized Hamiltonians
Generalizes iterative phase estimation to randomized Hamiltonians per step plus importance sampling, yielding fewer terms and sometimes fewer qubits for gapped chemical Hamiltonians.