Analysis of an integer-N frequency synthesizer for trapped ion quantum computers

Start Page
449
End Page
452
Citation
17th German Microwave Conference, GeMiC 2026
Contribution to Conference
17th German Microwave Conference, GeMiC 2026  
Publisher DOI
10.1109/GeMiC71240.2026.11516354
Scopus ID
2-s2.0-105041409133
Publisher
IEEE
ISBN of container
979-8-3195-1955-9
Qubit implementations like trapped ions can be controlled by microwave signals in the gigahertz range, which require a local oscillator (LO) for upconversion. The LO superimposes a static frequency offset and phase noise, both leading to errors in qubit gate operation. Both error terms can be reduced by implementing the LO as an integer-N frequency synthesizer, where a phase-locked loop controls and stabilizes the frequency. An exemplary integer-N frequency synthesizer is realized and its performance for quantum computers is characterized in this work. The qubit fidelity calculated based on phase noise measurement results is above 99.943% for primitive π-gates.
Subjects
Fidelity
integer-N synthesizer
local oscillator (LO)
phase noise
quantum computer
synthesizer
trapped ion
DDC Class
537: Electricity and Electronics