Unconditional reset of superconducting qubits and readout resonators using a quantum-circuit refrigerator

In quantum information processing with logical qubits, increasing the clock rate of the error correction cycles improves the qubit fidelity. The clock rate is limited by the duration of logical gates, qubit state readout, and initialization of qubits and readout circuits. Linear and non-linear superconducting resonators can be quickly initialized using a quantum-circuit refrigerator based on fast voltage pulsing of an SINIS junction [1,2]. We discuss our latest results to this end.

[1] V. Sevriuk et al., Appl. Phys. Lett. 115, 082601 (2019)
[2] D. Basilewitsch et al., New J. Phys. 21, 093054 (2019)

*IQM Finland OY, European Union’s Horizon 2020 Research and Innovation Programme under the Marie Sklodowska-Curie Grant No. 795159 and under the European Research Council Consolidator Grant No.681311 (QUESS), from the Academy of Finland Centre of Excellence in Quantum Technology Grant No. 312300, No.316619. and No. 305237, from JST ERATO Grant No. JP-MJER1601, from JSPS KAKENHI Grant No. 18K03486, from the EU Flagship project QMiCS, from the Emil Aaltonen Foundation, from the Alfred Kordelin Foundation, and from the Vilho, Yrjö and Kalle Väisälä Foundation. We acknowledge the provision of facilities and technical support by Aalto University at OtaNano - Micronova Nanofabrication Centre.

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Bulletin of the American Physical Society

APS March Meeting 2020

Volume 65, Number 1

Monday–Friday, March 2–6, 2020; Denver, Colorado

Session A36: Superconducting Qubit Readout, Detection, and Classical Control Electronics

Abstract: A36.00008 : Unconditional reset of superconducting qubits and readout resonators using a quantum-circuit refrigerator*

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