VQE on TFIM up to 27 spins shows hardware-efficient ansätze optimize smoothly but under-capture entanglement, while HVA-type ansätze match ground-state structure better at higher optimization cost.
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Geometric frustration in a square-lattice Ising model with diagonal couplings produces strongly inhomogeneous correlations that standard Hamiltonian-inspired variational ansatze cannot capture efficiently, increasing required circuit depth until bond-resolved parameters are introduced.
A literature review of VQAs covering ansatz design, classical optimization, barren plateaus, error mitigation strategies, and theoretical adaptations for fault-tolerant quantum computing.
citing papers explorer
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Ans\"atz Expressivity and Optimization in Variational Quantum Simulations of Transverse-field Ising Model Across System Sizes
VQE on TFIM up to 27 spins shows hardware-efficient ansätze optimize smoothly but under-capture entanglement, while HVA-type ansätze match ground-state structure better at higher optimization cost.
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Frustration-Induced Expressibility Limitations in Variational Quantum Algorithms
Geometric frustration in a square-lattice Ising model with diagonal couplings produces strongly inhomogeneous correlations that standard Hamiltonian-inspired variational ansatze cannot capture efficiently, increasing required circuit depth until bond-resolved parameters are introduced.
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A Review of Variational Quantum Algorithms: Insights into Fault-Tolerant Quantum Computing
A literature review of VQAs covering ansatz design, classical optimization, barren plateaus, error mitigation strategies, and theoretical adaptations for fault-tolerant quantum computing.