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| Format: | Preprint |
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2025
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| Online-Zugang: | https://arxiv.org/abs/2506.03456 |
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| _version_ | 1866913874854281216 |
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| author | Xia, Mingkang Lledó, Cristóbal Capocci, Matthew Repicky, Jacob D'Anjou, Benjamin Mondragon-Shem, Ian Kaufman, Ryan Koch, Jens Blais, Alexandre Hatridge, Michael |
| author_facet | Xia, Mingkang Lledó, Cristóbal Capocci, Matthew Repicky, Jacob D'Anjou, Benjamin Mondragon-Shem, Ian Kaufman, Ryan Koch, Jens Blais, Alexandre Hatridge, Michael |
| contents | Superconducting quantum circuits rely on strong drives to implement fast gates, high-fidelity readout, and state stabilization. However, these drives can induce uncontrolled excitations, so-called "ionization", that compromise the fidelity of these operations. While now well-characterized in the context of qubit readout, it remains unclear how general this limitation is across the more general setting of parametric control. Here, we demonstrate that a nonlinear coupler, exemplified by a transmon, undergoes ionization under strong parametric driving, leading to a breakdown of coherent control and thereby limiting the accessible gate speeds. Through experiments and numerical simulations, we associate this behavior with the emergence of drive-induced chaotic dynamics, which we characterize quantitatively using the instantaneous Floquet spectrum. Our results reveal that the Floquet spectrum provides a unifying framework for understanding strong-drive limitations across a wide range of operations on superconducting quantum circuits. This insight establishes fundamental constraints on parametric control and offers design principles for mitigating drive-induced decoherence in next-generation quantum processors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_03456 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Exceeding the Parametric Drive Strength Threshold in Nonlinear Circuits Xia, Mingkang Lledó, Cristóbal Capocci, Matthew Repicky, Jacob D'Anjou, Benjamin Mondragon-Shem, Ian Kaufman, Ryan Koch, Jens Blais, Alexandre Hatridge, Michael Quantum Physics Superconducting quantum circuits rely on strong drives to implement fast gates, high-fidelity readout, and state stabilization. However, these drives can induce uncontrolled excitations, so-called "ionization", that compromise the fidelity of these operations. While now well-characterized in the context of qubit readout, it remains unclear how general this limitation is across the more general setting of parametric control. Here, we demonstrate that a nonlinear coupler, exemplified by a transmon, undergoes ionization under strong parametric driving, leading to a breakdown of coherent control and thereby limiting the accessible gate speeds. Through experiments and numerical simulations, we associate this behavior with the emergence of drive-induced chaotic dynamics, which we characterize quantitatively using the instantaneous Floquet spectrum. Our results reveal that the Floquet spectrum provides a unifying framework for understanding strong-drive limitations across a wide range of operations on superconducting quantum circuits. This insight establishes fundamental constraints on parametric control and offers design principles for mitigating drive-induced decoherence in next-generation quantum processors. |
| title | Exceeding the Parametric Drive Strength Threshold in Nonlinear Circuits |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2506.03456 |