Qiskit Quantum Seminar

Currently Playing: Evidence for the Utility of Quantum Computing before Fault Tolerance | Qiskit Seminar Series

Qiskit Seminar Series Episode 130 with Youngseok Kim & Andrew Eddins Hosted by Zlatko Minev Abstract: One of the biggest impediments for achieving useful quantum computing is noise. The widely accepted solution to this challenge is fault-tolerant quantum circuits, however, it is out of reach for currently available processors to achieve computation at utility scale. Instead, we argue that quantum error mitigation enables access to accurate expectation values even on existing, noisy quantum computers. Establishing the applicability of these techniques at scales beyond those accessible to brute force classical methods is a crucial step toward probing a computational advantage with near-term noisy quantum computers. Here we experimentally demonstrate the efficacy of an error mitigation technique, zero-noise extrapolation, for quantum circuits using up to 127 qubits. The accuracy of the mitigated expectation values is greatly enhanced by novel advances in the coherence of large-scale superconducting quantum processors, and the ability to controllably scale noise at this scale. These experiments demonstrate an important tool for the realization of near-term quantum applications in a pre-fault tolerant era. reference: https://www.nature.com/articles/s41586-023-06096-3 Uncovering Local Integrability in Quantum Many-Body Dynamics 124Q, depth 60 https://arxiv.org/abs/2307.07552 Bios: Youngseok Kim is Research Staff Member at IBM T.J. Watson Research Center. At IBM, he has been working toward establishing optimal qubit control, aiming to maintain the best performance of the quantum device at intermediate scale. His primary research interest is to explore opportunities in device level optimization domain for noisy intermediate scale quantum computer, pushing advances toward demonstrating useful quantum computing. Youngseok Kim received B.S. degree in Electrical Engineering from POSTECH, South Korea, M.S. and Ph. D. degrees in Electrical and Computer Engineering from University of Illinois at Urbana and Champaign. Andrew Eddins an IBM research staff member in Cambridge, MA. He has worked on device physics of superconducting qubits and amplifiers, and on implementations of quantum-classical algorithms. His current focus is understanding and applying quantum error mitigation techniques.