Generalizes iterative phase estimation to randomized Hamiltonians per step plus importance sampling, yielding fewer terms and sometimes fewer qubits for gapped chemical Hamiltonians.
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QESEM is a characterization-based error mitigation technique that achieves unbiased estimates with substantially reduced runtime cost compared to probabilistic error cancellation while outperforming zero-noise extrapolation on utility-scale circuits.
New criteria reveal VQE needs fault-tolerant quantum computers due to decoherence and QPE has exponentially suppressed success probability from orthogonality catastrophe in classical input states.
Simulates UCCSD-VQE to compute ground state energies for 14 small molecules on STO-3G basis as benchmark for quantum computers.
citing papers explorer
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Phase estimation with randomized Hamiltonians
Generalizes iterative phase estimation to randomized Hamiltonians per step plus importance sampling, yielding fewer terms and sometimes fewer qubits for gapped chemical Hamiltonians.
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Reliable high-accuracy error mitigation for utility-scale quantum circuits
QESEM is a characterization-based error mitigation technique that achieves unbiased estimates with substantially reduced runtime cost compared to probabilistic error cancellation while outperforming zero-noise extrapolation on utility-scale circuits.
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Feasibility of performing quantum chemistry calculations on quantum computers
New criteria reveal VQE needs fault-tolerant quantum computers due to decoherence and QPE has exponentially suppressed success probability from orthogonality catastrophe in classical input states.
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Computational Chemistry on Quantum Computers: Ground state estimation
Simulates UCCSD-VQE to compute ground state energies for 14 small molecules on STO-3G basis as benchmark for quantum computers.