Theory of quasiparticle generation by microwave drives in superconducting qubits
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915771907571712 |
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| author | Chowdhury, Shoumik Hays, Max Jha, Shantanu R. Serniak, Kyle Orlando, Terry P. Grover, Jeffrey A. Oliver, William D. |
| author_facet | Chowdhury, Shoumik Hays, Max Jha, Shantanu R. Serniak, Kyle Orlando, Terry P. Grover, Jeffrey A. Oliver, William D. |
| contents | Microwave drives play a central role in the control of superconducting quantum circuits, enabling qubit gates, readout, and parametric interactions. As the drive frequencies are typically an order of magnitude smaller than (twice) the superconducting gap, it is generally assumed that such drives do not disturb the BCS ground state. However, sufficiently strong drives can activate multiphoton pair-breaking processes that generate quasiparticles (QPs) and result in qubit errors. In this work, we present a theoretical framework for calculating the rates of multiphoton-assisted pair-breaking transitions induced by charge- or flux-coupled microwave drives. Through illustrative examples, we show that photon-assisted QP generation may affect novel high-frequency dispersive readout architectures, as well as Floquet-engineered superconducting circuits operating under strong driving. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_00773 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Theory of quasiparticle generation by microwave drives in superconducting qubits Chowdhury, Shoumik Hays, Max Jha, Shantanu R. Serniak, Kyle Orlando, Terry P. Grover, Jeffrey A. Oliver, William D. Quantum Physics Mesoscale and Nanoscale Physics Superconductivity Microwave drives play a central role in the control of superconducting quantum circuits, enabling qubit gates, readout, and parametric interactions. As the drive frequencies are typically an order of magnitude smaller than (twice) the superconducting gap, it is generally assumed that such drives do not disturb the BCS ground state. However, sufficiently strong drives can activate multiphoton pair-breaking processes that generate quasiparticles (QPs) and result in qubit errors. In this work, we present a theoretical framework for calculating the rates of multiphoton-assisted pair-breaking transitions induced by charge- or flux-coupled microwave drives. Through illustrative examples, we show that photon-assisted QP generation may affect novel high-frequency dispersive readout architectures, as well as Floquet-engineered superconducting circuits operating under strong driving. |
| title | Theory of quasiparticle generation by microwave drives in superconducting qubits |
| topic | Quantum Physics Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2505.00773 |