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- W3152344842 abstract "Achieving near-term quantum advantage will require accurate estimation of quantum observables despite significant hardware noise. For this purpose, we propose a novel, scalable error-mitigation method that applies to gate-based quantum computers. The method generates training data ${X_i^{text{noisy}},X_i^{text{exact}}}$ via quantum circuits composed largely of Clifford gates, which can be efficiently simulated classically, where $X_i^{text{noisy}}$ and $X_i^{text{exact}}$ are noisy and noiseless observables respectively. Fitting a linear ansatz to this data then allows for the prediction of noise-free observables for arbitrary circuits. We analyze the performance of our method versus the number of qubits, circuit depth, and number of non-Clifford gates. We obtain an order-of-magnitude error reduction for a ground-state energy problem on 16 qubits in an IBMQ quantum computer and on a 64-qubit noisy simulator." @default.
- W3152344842 created "2021-04-13" @default.
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- W3152344842 date "2021-03-17" @default.
- W3152344842 modified "2023-09-27" @default.
- W3152344842 title "Error mitigation with Clifford quantum-circuit data" @default.
- W3152344842 hasPublicationYear "2021" @default.
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