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• W2970727444 abstract "Quantum algorithms for molecular electronic structure have been developed with lower computational scaling than their classical counterparts, but emerging quantum hardware is far from being capable of the coherence, connectivity, and gate errors required for their experimental realization. Here we propose a class of quantum-classical hybrid algorithms that computes the energy from a two-electron reduced density matrix (2-RDM). The 2-RDM is constrained by $N$-representability conditions, constraints for representing an $N$-electron wave function, which mitigate noise from the quantum circuit. We compute the strongly correlated dissociation of doublet ${mathrm{H}}_{3}$ into three hydrogen atoms. The hybrid quantum-classical computer matches the energies from full configuration interaction to 0.1 kcal/mol, one-tenth of ``chemical accuracy,'' even in the strongly correlated limit of dissociation. Furthermore, the spatial locality of the computed one-electron RDM reveals that the quantum computer accurately predicts the Mott metal-insulator transition." @default.
• W2970727444 created "2019-09-05" @default.
• W2970727444 creator A5045248121 @default.
• W2970727444 creator A5052995521 @default.
• W2970727444 date "2019-08-28" @default.
• W2970727444 modified "2023-10-18" @default.
• W2970727444 title "Quantum-classical hybrid algorithm using an error-mitigating <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mi>N</mml:mi></mml:math> -representability condition to compute the Mott metal-insulator transition" @default.
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• W2970727444 doi "https://doi.org/10.1103/physreva.100.022517" @default.
• W2970727444 hasPublicationYear "2019" @default.
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