QLS applied to single- and multi-reference linearized coupled cluster shows polylog κ and sublinear sparsity on model systems, supporting prospects of exponential advantage over conjugate gradient.
(21), we obtain: EicMR =E 0 + X α ⟨ψ0| ˆH|φ α⟩ ⟨φα| ˆT ′ |ψ0⟩ + X β ⟨ψ0| ˆH|φ β⟩ ⟨φβ| ˆT ′ |ψ0⟩
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Quantum linear solvers for quantum chemistry: prospects of exponential quantum advantage
QLS applied to single- and multi-reference linearized coupled cluster shows polylog κ and sublinear sparsity on model systems, supporting prospects of exponential advantage over conjugate gradient.