[Tu-P] Quantum technologies: semiconductor qubits and applications, cryo-CMOS technologies

[Tu-P-117] Cryogenic Tunnel-Diode Oscillator for Qubit Readout

〇Ivan Grytsenko¹, Sander van Haagen^1,2, Asher Jennings¹, Jun Wang¹, Yiran Tian^1,3, Oleksiy Rybalko^1,4, Erika Kawakami^1,5 (1. RQC, RIKEN (Japan), 2. The Univ. of Delft (Netherlands), 3. Kazan Federal Uni. (Russia), 4. B. Verkin Inst. for LTPE of NASU (Ukraine), 5. CPR, RIKEN (Japan))

We demonstrate a low-power cryogenic tunnel-diode oscillator for qubit readout, consuming ~1 μW and operating at 140–500 MHz. The device shows superior amplitude stability compared to commercial sources and enables integration at 10 mK, with proof-of-concept readout using varactor-based capacitance modulation.