CQT Talk by Raam Uzdin, Hebrew University of Jerusalem
Title: To mitigate or not to mitigate: will quantum error mitigation make NISQ devices useful?
Date/Time: 25-Jul, 03:00PM
Venue: CQT Level 3 Seminar Room, S15-03-15
Mitigating noise in a quantum circuit/device without knowing the nature of the noise or the expected output of the ideal circuit seems like an unrealistic challenge. Yet, Quantum Error Mitigation (QEM) encompasses a range of postprocessing techniques that achieve precisely that. This magic comes at a price of extra runtime for reducing the statistcal sampling uncertainty. These days, QEM is utilized in the vast majority of quantum computer experiments. While it was orginally designed as an intermediate solution until quantum error correction code technology matures, QEM also holds promise for long-term use in alleviating the substantial hardware overhead associated with error correction. In this talk we present our pulse-based Adaptive KIK technique [1] for mitigating incoherent errors (Markovian noise) and also introduce the Pseudo Twirling protocol for mitigating coherernt errors (crosstalks and non-Markovian noise). Finally we show that for high fidelity circuits, error mitigation should already be used in the gate calibration processes. The talk will contain both theory and experimental results from the IBMQ and AQT platforms.[1] I. Henao, J. P. Santos and R. Uzdin, npj Quantum Information 1, 120 (2023)