3 papers
quant-ph2020
Unitary transformation of the electronic Hamiltonian with an exact quadratic truncation of the Baker-Campbell-Hausdorff expansion
Robert A. Lang, Ilya G. Ryabinkin, Artur F. Izmaylov
Application of current and near-term quantum hardware to the electronic structure problem is highly limited by qubit counts, coherence times, and gate fidelities. To address these…
quant-ph2019
Unitary partitioning approach to the measurement problem in the Variational Quantum Eigensolver method
Artur F. Izmaylov, Tzu-Ching Yen, Robert A. Lang +1
To obtain estimates of electronic energies, the Variational Quantum Eigensolver (VQE) technique performs separate measurements for multiple parts of the system Hamiltonian. Current…
quant-ph2019
Exact and approximate symmetry projectors for the electronic structure problem on a quantum computer
Tzu-Ching Yen, Robert A. Lang, Artur F. Izmaylov
Solving the electronic structure problem on a universal-gate quantum computer within the variational quantum eigensolver (VQE) methodology requires constraining the search procedur…