Error mitigation of shot-to-shot fluctuations in analog quantum simulators

• URL: http://arxiv.org/abs/2506.16509v1
• Date: Thu, 19 Jun 2025 18:00:00 GMT
• Title: Error mitigation of shot-to-shot fluctuations in analog quantum simulators
• Authors: Thomas Steckmann, De Luo, Yu-Xin Wang, Sean R. Muleady, Alireza Seif, Christopher Monroe, Michael J. Gullans, Alexey V. Gorshkov, Or Katz, Alexander Schuckert,
• Abstract summary: We introduce an error mitigation technique that addresses shot-to-shot fluctuations in the parameters for the Hamiltonian governing the system dynamics.<n>We rigorously prove that amplifying this shot-to-shot noise and extrapolating to the zero-noise limit recovers noiseless results for realistic noise distributions.<n> Numerically, we predict a significant enhancement in the effective many-body coherence time for Rydberg atom arrays under realistic conditions.
• Score: 46.54051337735883
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Analog quantum simulators have provided key insights into quantum many-body dynamics. However, in such systems, both coherent and incoherent errors limit their scalability, hindering simulations in regimes that challenge classical simulations. In this work, we introduce an error mitigation technique that addresses and effectively suppresses a key source of error in leading simulator platforms: shot-to-shot fluctuations in the parameters for the Hamiltonian governing the system dynamics. We rigorously prove that amplifying this shot-to-shot noise and extrapolating to the zero-noise limit recovers noiseless results for realistic noise distributions. Experimentally, we demonstrate this technique on a 27-ion trapped-ion quantum simulator, extending the two-qubit exchange oscillation lifetime threefold. Numerically, we predict a significant enhancement in the effective many-body coherence time for Rydberg atom arrays under realistic conditions. Our scheme provides a possible route towards extending the effective coherence time in analog quantum experiments, enabling deeper explorations of quantum many-body dynamics.

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