Theory of Quasiparticle Generation by Microwave Drives in Superconducting Qubits

• URL: http://arxiv.org/abs/2505.00773v1
• Date: Thu, 01 May 2025 18:07:13 GMT
• Title: Theory of Quasiparticle Generation by Microwave Drives in Superconducting Qubits
• Authors: Shoumik Chowdhury, Max Hays, Shantanu R. Jha, Kyle Serniak, Terry P. Orlando, Jeffrey A. Grover, William D. Oliver,
• Abstract summary: Microwave drives are commonly employed to control superconducting quantum circuits.<n>We present a theoretical framework for calculating the rates of multi-photon-assisted pair-breaking transitions induced by microwave drives.
• Score: 0.24091079613649843
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Microwave drives are commonly employed to control 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 multi-photon pair-breaking processes that generate quasiparticles and result in qubit errors. In this work, we present a theoretical framework for calculating the rates of multi-photon-assisted pair-breaking transitions induced by both charge- and flux-coupled microwave drives. Through illustrative examples, we show that drive-induced QP generation may impact novel high-frequency dispersive readout architectures, as well as Floquet-engineered superconducting circuits operating under strong driving conditions.

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