Bonn 2025 – scientific programme

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QI: Fachverband Quanteninformation

QI 8: Quantum Computing Theory I

QI 8.6: Talk

Monday, March 10, 2025, 18:30–18:45, HS IV

Increasing Accuracy of the Variational Quantum Eigensolver with the Inverted-Circuit Zero-Noise Extrapolation — •Tobias Nauck, Kathrin König, Walter Hahn, and Thomas Wellens — Fraunhofer IAF

Simulating entangled quantum states is inherently challenging for classical computers, which makes this task a prime target for quantum computers. The Variational Quantum Eigensolver (VQE) is a promising method for approximating molecular ground states, but current quantum hardware's noise hinders its practical implementation. In this talk, we discuss results achieved by using the recently proposed noise mitigation technique Inverted-Circuit Zero-Noise Extrapolation (IC-ZNE) [1] in VQE calculations. We present noisy simulations of VQE circuits comparing IC-ZNE with the standard Zero-Noise Extrapolation method for various molecules and show an increased accuracy of the results when using IC-ZNE.

[1] https://journals.aps.org/pra/abstract/10.1103/PhysRevA.110.042625

Keywords: Variational; Noise mitigation; Zero Noise Extrapolation; Variational Quantum Eigensolver; Mitigation