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- W4297847196 abstract "We propose the use of parameter-free preentanglers as initial states for quantum algorithms. We apply this idea to the electronic structure problem, combining a quantized version of the Canonical Transformation by Yanai and Chan [J. Chem. Phys. 124, 194106 (2006)] with the Complete Active Space Density Matrix Renormalization Group. This new ansatz allows to shift the computational burden between the quantum and the classical processor. In the vicinity of multi-reference points in the potential energy surfaces of H$_2$O, N$_2$, BeH$_2$ and the P4 system, we find this strategy to require significantly less parameters than corresponding generalized unitary coupled cluster circuits. We propose a new algorithm to prepare Matrix Product States based on the Linear Combination of Unitaries and compare it to the Sequential Unitary Algorithm proposed by Ran in [Phys. Rev. A 101, 032310 (2020)]." @default.
- W4297847196 created "2022-10-01" @default.
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- W4297847196 date "2022-09-15" @default.
- W4297847196 modified "2023-10-16" @default.
- W4297847196 title "Preentangling Quantum Algorithms -- the Density Matrix Renormalization Group-assisted Quantum Canonical Transformation" @default.
- W4297847196 doi "https://doi.org/10.48550/arxiv.2209.07106" @default.
- W4297847196 hasPublicationYear "2022" @default.
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