تقرير
Initial experimental results on a superconducting-qubit reset based on photon-assisted quasiparticle tunneling
العنوان: | Initial experimental results on a superconducting-qubit reset based on photon-assisted quasiparticle tunneling |
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المؤلفون: | Sevriuk, V. A., Liu, W., Rönkkö, J., Hsu, H., Marxer, F., Mörstedt, T. F., Partanen, M., Räbinä, J., Venkatesh, M., Hotari, J., Grönberg, L., Heinsoo, J., Li, T., Tuorila, J., Chan, K. W., Hassel, J., Tan, K. Y., Möttönen, M. |
المصدر: | Appl. Phys. Lett. 121, 234002 (2022) |
سنة النشر: | 2022 |
المجموعة: | Condensed Matter Physics (Other) Quantum Physics |
مصطلحات موضوعية: | Quantum Physics, Condensed Matter - Superconductivity, Physics - Applied Physics |
الوصف: | We present here our recent results on qubit reset scheme based on a quantum-circuit refrigerator (QCR). In particular, we use the photon-assisted quasiparticle tunneling through a superconductor--insulator--normal-metal--insulator--superconductor junction to controllably decrease the energy relaxation time of the qubit during the QCR operation. In our experiment, we use a transmon qubit with dispersive readout. The QCR is capacitively coupled to the qubit through its normal-metal island. We employ rapid, square-shaped QCR control voltage pulses with durations in the range of 2--350 ns and a variety of amplitudes to optimize the reset time and fidelity. Consequently, we reach a qubit ground-state probability of roughly 97% with 80-ns pulses starting from the first excited state. The qubit state probability is extracted from averaged readout signal, where the calibration is based of the Rabi oscillations, thus not distinguishing the residual thermal population of the qubit. |
نوع الوثيقة: | Working Paper |
DOI: | 10.1063/5.0129345 |
URL الوصول: | http://arxiv.org/abs/2212.01065 |
رقم الأكسشن: | edsarx.2212.01065 |
قاعدة البيانات: | arXiv |
DOI: | 10.1063/5.0129345 |
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