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Broadband Bandpass Purcell Filter for Circuit Quantum Electrodynamics
- Source :
- Appl. Phys. Lett. 123, 134001 (2023)
- Publication Year :
- 2023
-
Abstract
- In circuit quantum electrodynamics (QED), qubits are typically measured using dispersively-coupled readout resonators. Coupling between each readout resonator and its electrical environment however reduces the qubit lifetime via the Purcell effect. Inserting a Purcell filter counters this effect while maintaining high readout fidelity, but reduces measurement bandwidth and thus limits multiplexing readout capacity. In this letter, we develop and implement a multi-stage bandpass Purcell filter that yields better qubit protection while simultaneously increasing measurement bandwidth and multiplexed capacity. We report on the experimental performance of our transmission-line--based implementation of this approach, a flexible design that can easily be integrated with current scaled-up, long coherence time superconducting quantum processors.
- Subjects :
- Quantum Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Appl. Phys. Lett. 123, 134001 (2023)
- Publication Type :
- Report
- Accession number :
- edsarx.2306.06258
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1063/5.0161893