首页|Optimize Purcell filter design for reducing influence of fabrication variation

Optimize Purcell filter design for reducing influence of fabrication variation

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To protect superconducting qubits and enable rapid readout,optimally designed Purcell filters are essential.To sup-press the off-resonant driving of untargeted readout resonators,individual Purcell filters are used for each readout resonator.However,achieving consistent frequency between a readout resonator and a Purcell filter is a significant challenge.A sys-tematic computational analysis is conducted to investigate how fabrication variation affects filter performance,through fo-cusing on the coupling capacitor structure and coplanar waveguide(CPW)transmission line specifications.The results indi-cate that the T-type enclosing capacitor(EC),which exhibits lower structural sensitivity,is more advantageous for achieving target capacitance than the C-type EC and the interdigital capacitor(IDC).By utilizing a large-sized CPW with the T-type EC structure,fluctuations in the effective coupling strength can be reduced to 10％,given typical micro-nanofabrication variances.The numerical simulations presented in this work minimize the influence of fabrication deviations,thereby significantly improving the reliability of Purcell filter designs.

superconducting circuitPurcell filtercoplanar waveguidecapacitor structure

蔡晓、周翼彪、于文龙、熊康林、冯加贵

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Gusu Laboratory of Materials,Suzhou 215123,China

Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China

Project support by the Youth Innovation Promotion Association of the Chinese Academy of Sciences(CAS)Startup Foundation of Suzhou Institute of Nano-Tech and Nano-Bionics,CAS,Suzhou,ChinaInnovative and Entrepreneurial Talents Project of Jiangsu Province,ChinaExcellent Postdoctoral Talent Program of Jiangsu Province,China

2019319Y9AAD110JSS-CBS202217432023ZB816

2024

10.1088/1674-1056/ad3345

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(6)
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