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• W3000216880 abstract "We propose an efficient O(N2)-parameter ansatz that consists of a sequence of exponential operators, each of which is a unitary variant of Neuscamman’s cluster Jastrow operator. The ansatz can also be derived as a decomposition of T2 amplitudes of the unitary coupled cluster with generalized singles and doubles, which gives a near full-CI energy. The proposed ansatz therefore can reproduce the uCCGSD energy, or rather will reach the exact full-CI energy because of the exponential operator product form. Because the cluster Jastrow operators are expressed by a product of number operators and the derived Pauli operator products, namely, the Jordan–Wigner strings, are all commutative, it does not require the Trotter approximation to implement to a quantum circuit and should be a good candidate for the variational quantum eigensolver algorithm of a near-term quantum computer. The accuracy of the ansatz was examined for dissociation of a nitrogen dimer, and compared with other existing O(N2)-parameter ansatzs. Not only the original ansatzs defined in the second-quantization form but also their Trotter-splitting variants, in which the cluster amplitudes are optimized to minimize the energy obtained with a few, typically single, Trotter steps, were examined by quantum circuit simulators." @default.
• W3000216880 created "2020-01-23" @default.
• W3000216880 creator A5002234716 @default.
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• W3000216880 date "2020-01-15" @default.
• W3000216880 modified "2023-10-09" @default.
• W3000216880 title "Jastrow-type Decomposition in Quantum Chemistry for Low-Depth Quantum Circuits" @default.
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• W3000216880 doi "https://doi.org/10.1021/acs.jctc.9b00963" @default.
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