Probing fast quantum circuit refrigeration in the quantum regime
Photon-absorption-based quantum circuit refrigeration is crucial to developing superconducting quantum computers, particularly for initializing qubits. However, precise and rapid measurement of residual photons in the circuit immediately after absorption has been a significant technical challenge. This study employs the ac Stark shift of superconducting qubits to detect sub-photon-level energies in the circuit, confirming the effectiveness of the fast refrigeration even in the quantum regime. These results will facilitate the development of more efficient quantum refrigeration devices and faster, high-fidelity qubit initialization.
Authors
- Teruaki Yoshioka (ORCID: https://orcid.org/0000-0002-6446-4862)
- Shintaro Takada (ORCID: https://orcid.org/0000-0002-7831-585X)
- Yuma Okazaki (ORCID: https://orcid.org/0000-0002-2806-8774)
- Shuji Nakamura (ORCID: https://orcid.org/0000-0002-0195-1428)
- Akiyoshi Tomonaga (ORCID: https://orcid.org/0000-0003-2316-7412)
- Sergei Lemziakov
- Jukka P Pekola (ORCID: https://orcid.org/0000-0003-0984-1829)
- Hiroto Mukai (ORCID: https://orcid.org/0000-0001-6689-7963)
- Nobu‐Hisa Kaneko (ORCID: https://orcid.org/0000-0003-3857-7940)
- Dmitrii Lvov
- Jaw-Shen Tsai
Institutions
- Tokyo University of Science (JP)
- Computing Center (RU)
- RIKEN Center for Quantum Computing
- National Institute of Advanced Industrial Science and Technology (JP)
- Aalto University (FI)
Publication Details
- Journal
- Physical Review Applied
- Published
- 2025-01-10
- DOI
- https://doi.org/10.1103/physrevapplied.23.l011003
- Citations
- 2
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 4.96
Funders
- Japan Society for the Promotion of Science