A hybrid QACG solver uses quantum spectral initialization to split condition-number burden between quantum and classical parts, yielding runtime gains in identified regimes for the 3D Poisson equation.
This convention differs from earlier sections of the paper, wherendenotes the number of unknowns per spatial dimension in the discretized Poisson equation
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Quantum-accelerated conjugate gradient method via spectral initialization
A hybrid QACG solver uses quantum spectral initialization to split condition-number burden between quantum and classical parts, yielding runtime gains in identified regimes for the 3D Poisson equation.