Microstrip filters for measurement and control of superconducting qubits

Abstract

Careful filtering is necessary for observations of quantum phenomena in superconducting circuits at low temperatures. Measurements of coherence between quantum states requires extensive filtering to protect against noise coupled from room temperature electronics. We demonstrate distributed transmission line filters which cut off exponentially at GHz frequencies and can be anchored at the base temperature of a dilution refrigerator. The compact design makes them suitable to filter many different bias lines in the same setup, necessary for the control and measurement of superconducting qubits.

References in corpus (10)

• Observation of transition from escape dynamics to underdamped phase diffusion in a Josephson junction
• Crossover from Kramers to phase-diffusion switching in hysteretic DC-SQUIDs
• Thermal hopping and retrapping of a Brownian particle in the tilted periodic potential of a NbN/MgO/NbN Josephson junction
• Direct transition from quantum escape to phase diffusion regime in YBaCuO biepitaxial Josephson Junctions
• Impedance-matched low-pass stripline filters
• Millikelvin thermal and electrical performance of lossy transmission line filters
• Quantum crossover in moderately damped epitaxial NbN/MgO/NbN junctions with low critical current density
• Micro-fabricated electromagnetic filters for millikelvin experiments
• Decoherence in rf SQUID Qubits
• Efficient Radio Frequency filters for space constrained cryogenic set-ups

Cited by in corpus (5)

• Influence of Topological Edge States on the Properties of Al/Bi2Se3/Al Hybrid Josephson Devices
• Progress in cooling nanoelectronic devices to ultra-low temperatures
• Silver-Epoxy Microwave Filters and Thermalizers for Millikelvin Experiments
• Resolving the effects of frequency dependent damping and quantum phase diffusion in YBa${}_2$Cu${}_3$O${}_{7-x}$ Josephson junctions
• The read-out electronics for the FLASH experiment