Ultralow-power coherent qubit control using AQFP logic at millikelvin temperatures

• URL: http://arxiv.org/abs/2603.27231v1
• Date: Sat, 28 Mar 2026 10:55:52 GMT
• Title: Ultralow-power coherent qubit control using AQFP logic at millikelvin temperatures
• Abstract summary: We report an ultralow-power qubit controller using an AQFP-multiplexed qubit controller with virtual Z gates (AQFP QC-VZ)<n>The AQFP QC-VZ generates multi-tone microwave pulses for qubit control with an ultralow power dissipation of 111 pW per qubit.<n>We demonstrate coherent single-qubit gates at the 10 mK stage using an AQFP mixer, a core component of the AQFP QC-VZ, without observable degradation in coherence.
• Score: 4.6094876264163736
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Qubit controllers are essential for scaling superconducting quantum processors, but implementing them at the 10 mK stage of a dilution refrigerator remains challenging due to stringent cooling constraints. Here we report an ultralow-power qubit controller using adiabatic quantum-flux-parametron (AQFP) logic, termed an AQFP-multiplexed qubit controller with virtual Z gates (AQFP QC-VZ). The AQFP QC-VZ generates multi-tone microwave pulses for qubit control with an ultralow power dissipation of 111 pW per qubit. By combining microwave and time-division multiplexing, the AQFP QC-VZ enables parallel application of X and virtual Z gates to multiple qubits using only a few control lines from room temperature. We demonstrate coherent single-qubit gates at the 10 mK stage using an AQFP mixer, a core component of the AQFP QC-VZ, without observable degradation in coherence.

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