Conference Presentation (Plenary/Keynote)

FZJ-2024-07016

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Stray multiqubit interactions in quantum processors

Xu, X.FZJ* ; Vignes, C. ; Ansari, M.FZJ* ; Martinis, J.

2024

Abstract: The advancement of quantum computing encounters a significant hurdle in the form of undesirable stray couplings. These couplings have the potential to impede gate operations and lead to fidelity loss. In this talk, we delve into an investigation of the influence of stray couplings within a multiqubit circuit. We introduce analytical expressions to quantitatively measure these effects, highlighting the essential parameters to mitigate their parasitic impact. We also reveal the feasibility of completely suppressing all stray interactions. Furthermore, our research explores the exciting prospect of achieving multiqubit capabilities surpassing those of traditional two-body interactions. This breakthrough holds promise for enhancing the optimization and overall performance of quantum algorithms.

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Contributing Institute(s):

1. Theoretische Nanoelektronik (PGI-2)

Research Program(s):

1. 5214 - Quantum State Preparation and Control (POF4-521) (POF4-521)
2. 5215 - Towards Quantum and Neuromorphic Computing Functionalities (POF4-521) (POF4-521)
3. 5221 - Advanced Solid-State Qubits and Qubit Systems (POF4-522) (POF4-522)
4. Verbundprojekt: German Quantum Computer based on Superconducting Qubits (GEQCOS) - Teilvorhaben: Charakterisierung, Kontrolle und Auslese (13N15685) (13N15685)
5. OpenSuperQPlus - Open Superconducting Quantum Computers (101113946) (101113946)

Appears in the scientific report 2024

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