SZ-LCT uses a BCH-expanded unitary transformation with a generator chosen to minimize non-seniority-zero Hamiltonian elements, achieving submilliHartree accuracy for strongly correlated electrons at O(N^8/n_c) scaling.
Zhao , author J
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VQE with EfficientSU2 and Hamiltonian Variational ansatze approximates TFIM ground states and entanglement in up to 3D lattices of 27 spins, with accuracy tied to ansatz expressivity and optimization success.
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Seniority-zero Linear Canonical Transformation Theory
SZ-LCT uses a BCH-expanded unitary transformation with a generator chosen to minimize non-seniority-zero Hamiltonian elements, achieving submilliHartree accuracy for strongly correlated electrons at O(N^8/n_c) scaling.
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Ans\"atz Expressivity and Optimization in Variational Quantum Simulations of Transverse-field Ising Model Across System Sizes
VQE with EfficientSU2 and Hamiltonian Variational ansatze approximates TFIM ground states and entanglement in up to 3D lattices of 27 spins, with accuracy tied to ansatz expressivity and optimization success.