Quantum 2025 – wissenschaftliches Programm
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FRI: Friday Contributed Sessions
FRI 6: Quantum Error Mitigation
FRI 6.1: Vortrag
Freitag, 12. September 2025, 10:45–11:00, ZHG007
Error Mitigation for Time-Evolution Approach for Greens Functions on Quantum Computers — •Jannis Ehrlich1 and Daniel F. Urban1,2 — 1Fraunhofer-Institut für Werkstoffmechanik IWM, Freiburg, Germany — 2Freiburger Materialforschungszentrum, Universität Freiburg, Germany
The computation of Greens functions plays a central role in many-particle physics, as they are directly connected to the energy of the system and the spectral function. Their calculation with classical computers is challenging due to the explicit treatment of electron interactions, especially in the case of strong correlation effects. We present a time-evolution approach for extracting the Greens function by simulating the quantum system on a quantum computer. We explicitly investigate the influence of errors on the results and proper error mitigation strategies as well as the effect of symmetry protection for simulations on current quantum devices.
Keywords: Quantum Computing; Time-Evolution; Correlated Electrons