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Quantum Chemistry
Optimizing VQE Ansatz for Studying Tight-Binding Models with sd-Interaction and On-Site Coulomb Repulsion
arXiv
Authors: Oleg Udalov
Year
2025
Paper ID
51423
Status
Preprint
Abstract Read
~2 min
Abstract Words
78
Citations
N/A
Abstract
The VQE algorithm is applied to the problem of finding the ground state of a lattice model with on-site Coulomb repulsion, nearest-neighbor hopping, and on-site sd-interaction. We compare the performance of several ansatze, including cluster and generic forms. Several modifications of the standard cluster ansatz implementation are proposed, which significantly reduce the number of two-qubit gates. Different classical optimizers are employed within the VQE algorithm. The performance of the algorithms is evaluated using both noiseless and noisy simulations.
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- This paper contributes to the Quantum Simulation research area in the Quantum Articles archive.
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- The VQE algorithm is applied to the problem of finding the ground state of a lattice model with on-site Coulomb repulsion, nearest-neighbor hopping, and on-site sd-interaction.
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