Abstract
We report on fast tunability of an electromagnetic environment coupled to a superconducting coplanar waveguide resonator. Namely, we utilize a recently developed quantum-circuit refrigerator (QCR) to experimentally demonstrate a dynamic tunability in the total damping rate of the resonator up to almost two orders of magnitude. Based on the theory, it corresponds to a change in the internal damping rate by nearly four orders of magnitude. The control of the QCR is fully electrical, with the shortest implemented operation times in the range of 10 ns. This experiment constitutes a fast active reset of a superconducting quantum circuit. In the future, a similar scheme can potentially be used to initialize superconducting quantum bits.
| Original language | English |
|---|---|
| Article number | 082601 |
| Number of pages | 5 |
| Journal | Applied Physics Letters |
| Volume | 115 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 19 Aug 2019 |
| MoE publication type | A1 Journal article-refereed |
Funding
This project received funding from the European Union's Horizon 2020 Research and Innovation Programme under Marie Skłodowska-Curie Grant No. 795159 and under European Research Council Consolidator Grant No. 681311 (QUESS); from the Academy of Finland Centre of Excellence in Quantum Technology Grant Nos. 312300, 316619, and 305237; from JST ERATO Grant No. JPMJER1601; 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 of Aalto University at OtaNano—Micronova Nanofabrication Center.
Keywords
- OtaNano