Quasiparticle dynamics in a superconducting qubit irradiated by a localized infrared source
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866911988813135872 |
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| author | Benevides, Rodrigo Drimmer, Maxwell Bisson, Giacomo Adinolfi, Francesco von Lüpke, Uwe Doeleman, Hugo Michiel Catelani, Gianluigi Chu, Yiwen |
| author_facet | Benevides, Rodrigo Drimmer, Maxwell Bisson, Giacomo Adinolfi, Francesco von Lüpke, Uwe Doeleman, Hugo Michiel Catelani, Gianluigi Chu, Yiwen |
| contents | A known source of decoherence in superconducting qubits is the presence of broken Cooper pairs, or quasiparticles. These can be generated by high-energy radiation, either present in the environment or purposefully introduced, as in the case of some hybrid quantum devices. Here, we systematically study the properties of a transmon qubit under illumination by focused infrared radiation with various powers, durations, and spatial locations. Despite the high energy of incident photons, our observations agree well with a model of low-energy quasiparticle dynamics dominated by trapping. This technique can be used for understanding and potentially mitigating the effects of high-energy radiation on superconducting circuits with a variety of geometries and materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2312_05892 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Quasiparticle dynamics in a superconducting qubit irradiated by a localized infrared source Benevides, Rodrigo Drimmer, Maxwell Bisson, Giacomo Adinolfi, Francesco von Lüpke, Uwe Doeleman, Hugo Michiel Catelani, Gianluigi Chu, Yiwen Quantum Physics Superconductivity A known source of decoherence in superconducting qubits is the presence of broken Cooper pairs, or quasiparticles. These can be generated by high-energy radiation, either present in the environment or purposefully introduced, as in the case of some hybrid quantum devices. Here, we systematically study the properties of a transmon qubit under illumination by focused infrared radiation with various powers, durations, and spatial locations. Despite the high energy of incident photons, our observations agree well with a model of low-energy quasiparticle dynamics dominated by trapping. This technique can be used for understanding and potentially mitigating the effects of high-energy radiation on superconducting circuits with a variety of geometries and materials. |
| title | Quasiparticle dynamics in a superconducting qubit irradiated by a localized infrared source |
| topic | Quantum Physics Superconductivity |
| url | https://arxiv.org/abs/2312.05892 |