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Article Dans Une Revue IEEE Transactions on Quantum Engineering Année : 2024

FASQuiC: Flexible architecture for scalable spin qubit control

Résumé

As scaling becomes a key issue for Large Scale Quantum (LSQ) computing, hardwarecontrol systems will become increasingly costly in resources. This paper presents a compact Direct DigitalSynthesis (DDS) architecture for signal generation adapted for spin qubits, which is scalable in terms ofwaveform accuracy and the number of synchronized channels. The architecture can produce programmablecombinations of ramps, frequency combs and Arbitrary Waveform Generation (AWG) at 5 GS/s, witha worst-case digital feedback latency of 76.8 ns. The FPGA-based system is highly configurable andtakes advantage of bitstream switching to achieve the high flexibility required for scalable calibration.The architecture also provides GHz rate multiplexed I/Q single-side band (SSB) modulation for scalablereflectometry. This architecture has been validated in hardware on a Xilinx ZCU111 FPGA demonstratingthe mixing of complex signals and the quality of the frequency comb generation for multiplexed controland measurement. The key benefits of this design are the increase of controllability of ramps at the Digitalto Analog Converter (DAC) frequency and the reduction in memory requirements by several orders ofmagnitude compared to existing AWG-based architectures. The hardware for a single channel is verycompact, 2% of ZCU111 logic resources for one DAC lane in the default configuration, leaving significantcircuit resources for integrated feedback, calibration and Quantum Error Correction (QEC).
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Dates et versions

cea-04612422 , version 1 (14-06-2024)

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Mathieu Toubeix, Eric Guthmuller, Adrian Evans, Antoine Faurie, Tristan Meunier. FASQuiC: Flexible architecture for scalable spin qubit control. IEEE Transactions on Quantum Engineering, 2024, ⟨10.1109/TQE.2024.3409811⟩. ⟨cea-04612422⟩
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