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• W3090453066 abstract "Abstract Variational quantum eigensolver (VQE) for electronic structure calculations is believed to be one major potential application of near term quantum computing. Among all proposed VQE algorithms, the unitary coupled cluster singles and doubles excitations (UCCSD) VQE ansatz has achieved high accuracy and received a lot of research interest. However, the UCCSD VQE based on fermionic excitations needs extra terms for the parity when using Jordan–Wigner transformation. Here we introduce a new VQE ansatz based on the particle preserving exchange gate to achieve qubit excitations. The proposed VQE ansatz has gate complexity up-bounded to O ( n 4 ) for all-to-all connectivity where n is the number of qubits of the Hamiltonian. Numerical results of simple molecular systems such as BeH 2 , H 2 O, N 2 , H 4 and H 6 using the proposed VQE ansatz gives very accurate results within errors about 10 −3 Hartree." @default.
• W3090453066 created "2020-10-08" @default.
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• W3090453066 date "2020-10-20" @default.
• W3090453066 modified "2023-10-06" @default.
• W3090453066 title "Qubit coupled cluster singles and doubles variational quantum eigensolver ansatz for electronic structure calculations" @default.
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• W3090453066 doi "https://doi.org/10.1088/2058-9565/abbc74" @default.
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