Parametric two-qubit gates via Landau-Zener interference
Abstract
We propose and demonstrate gates between two superconducting qubits based on quantum interference of consecutive Landau-Zener (LZ) transitions. This gate mechanism bridges between baseband and parametric two-qubit control, enabling in situ tuning of the control frequency across a continuous interval up to hundreds of MHz. Another advantage compared to dispersive couplers is that the speed of the LZ gate is on the order of the full coupling strength. We experimentally demonstrate the gate on two platforms, a modular chiplet architecture of coupled generalized flux qubits, and on a monolithic transmon architecture. The combination of tunability and gate speed establishes the LZ gate as a unique tool for multiplexing control pulses and interconnecting superconducting chiplet architectures.
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BibTeX
@misc{geisert2026parametric,
title = {{Parametric two-qubit gates via Landau-Zener interference}},
author = {Simon Geisert and Albert Hertel and Soeren Ihssen and Zhongyi Jiang and Paul Kugler and Nicolas Zapata and Nicolas Gosling and Ameya Nambisan and Yuan Gao and Asier Galicia and Jéferson R. Guimarães and Yorgo Haddad and Marc Neis and Harsh Bhardwaj and Dmitriy A. Volkov and Juan Cereijo and Marcello Guardascione and Yebin Liu and Markus Jerger and Pavel Bushev and Frank Wilhelm-Mauch and Wolfgang Wernsdorfer and Shai Machnes and Mohammad Ansari and Rami Barends and Ioan M. Pop},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.15604},
eprint = {2609.15604},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.15604},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Parametric two-qubit gates via Landau-Zener interference
AU - Simon Geisert
AU - Albert Hertel
AU - Soeren Ihssen
AU - Zhongyi Jiang
AU - Paul Kugler
AU - Nicolas Zapata
AU - Nicolas Gosling
AU - Ameya Nambisan
AU - Yuan Gao
AU - Asier Galicia
AU - Jéferson R. Guimarães
AU - Yorgo Haddad
AU - Marc Neis
AU - Harsh Bhardwaj
AU - Dmitriy A. Volkov
AU - Juan Cereijo
AU - Marcello Guardascione
AU - Yebin Liu
AU - Markus Jerger
AU - Pavel Bushev
AU - Frank Wilhelm-Mauch
AU - Wolfgang Wernsdorfer
AU - Shai Machnes
AU - Mohammad Ansari
AU - Rami Barends
AU - Ioan M. Pop
PY - 2026
DA - 2026/09/15
PB - arXiv
DO - 10.48550/arxiv.2609.15604
UR - https://arxiv.org/abs/2609.15604
AB - We propose and demonstrate gates between two superconducting qubits based on quantum interference of consecutive Landau-Zener (LZ) transitions. This gate mechanism bridges between baseband and parametric two-qubit control, enabling in situ tuning of the control frequency across a continuous interval up to hundreds of MHz. Another advantage compared to dispersive couplers is that the speed of the LZ gate is on the order of the full coupling strength. We experimentally demonstrate the gate on two platforms, a modular chiplet architecture of coupled generalized flux qubits, and on a monolithic transmon architecture. The combination of tunability and gate speed establishes the LZ gate as a unique tool for multiplexing control pulses and interconnecting superconducting chiplet architectures.
ER -