Journal Article

FZJ-2026-02302

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Suppressing Spurious Transitions Using Spectrally Balanced Pulse

Wang, R. ; Feng, Y. ; Zhang, Y. ; Ding, J. ; Li, B.FZJ* ; Motzoi, F.FZJ* ; Gao, Y. ; Xu, H. ; Nuerbolati, W. ; Yu, H. ; Sun, W. ; Yan, F. ; Yang, Z.

2025
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/h4xf-vq2l  doi:10.34734/FZJ-2026-02302

Abstract: Achieving precise control over quantum systems presents a significant challenge, especially in many-body setups, where residual couplings and unintended transitions undermine the accuracy of quantumoperations. In superconducting qubits, parasitic interactions—both between distant qubits and withspurious two-level systems—can severely limit the performance of quantum gates. In this Letter, weintroduce a pulse-shaping technique that uses spectrally balanced microwave pulses to suppress undesiredtransitions. Experimental results demonstrate an order-of-magnitude reduction in spurious excitationsbetween weakly detuned qubits as well as a substantial decrease in single-qubit gate errors caused by astrongly coupled two-level defect over a broad frequency range. Our method provides a simple yetpowerful solution for mitigating adverse effects from parasitic couplings, enhancing quantum gate fidelity.The pulse-shaping technique can be readily adapted to various physical systems.

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Contributing Institute(s):

1. Quantum Control (PGI-8)

Research Program(s):

1. 5221 - Advanced Solid-State Qubits and Qubit Systems (POF4-522) (POF4-522)

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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