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DOE OSTI · 1804437

Digital quantum simulation of non-equilibrium quantum many-body systems

Fauseweh, Benedikt·Zhu, Jian-Xin
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Abstract

Digital quantum simulation uses the capabilities of quantum computers to determine the dynamics of quantum systems, which are beyond the computability of modern classical computers. A notoriously challenging task in this field is the description of non-equilibrium dynamics in quantum many-body systems. In this study, we used the IBM quantum computers to simulate the non-equilibrium dynamics of few spin and fermionic systems. Our results reveal that with a combination of error mitigation, noise extrapolation and optimized initial state preparation, one can tackle the most important drawbacks of modern quantum devices. The systems we simulate demonstrate the potential for large-scale quantum simulations of light–matter interactions in the near future.

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71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICSdigital quantum simulationerror mitigationnoise extrapolationoptimal state preparation

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Fauseweh, Benedikt, Zhu, Jian-Xin. 2021-04-09. Digital quantum simulation of non-equilibrium quantum many-body systems. https://doi.org/10.1007/s11128-021-03079-z

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