Calibration of mixer amplitude and phase imbalance in superconducting circuits

Jolin, Shan W.; Borgani, Riccardo; Tholén, Mats O.; Forchheimer, Daniel; Haviland, David B.

doi:10.1063/5.0025836

Cited by 18 publications

(12 citation statements)

References 19 publications

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“…The applied voltages on the I (in-phase) and Q (out-of-phase) modulation ports afford full control over the amplitude and phase of the resulting RF tone. In practice, there are often several sources of imperfection that must be addressed to achieve a clean SSB signal [151].…”

Section: Iv2 Microwave Signal Processingmentioning

confidence: 99%

Practical Guide for Building Superconducting Quantum Devices

Gao

Rol²,

Touzard

et al. 2021

PRX Quantum

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Quantum computing offers a powerful new paradigm of information processing that has the potential to transform a wide range of industries. In the pursuit of the tantalizing promises of a universal quantum computer, a multitude of new knowledge and expertise has been developed, enabling the construction of novel quantum algorithms as well as increasingly robust quantum hardware. In particular, we have witnessed rapid progress in the circuit quantum electrodynamics (cQED) technology, which has emerged as one of the most promising physical systems that is capable of addressing the key challenges in realizing full-stack quantum computing on a large scale. In this article, we present some of the most crucial building blocks developed by the cQED community in recent years and a précis of the latest achievements towards robust universal quantum computation. More importantly, we aim to provide a synoptic outline of the core techniques that underlie most cQED experiments and offer a practical guide for a novice experimentalist to design, construct, and characterize their first quantum device.

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Section: Iv2 Microwave Signal Processingmentioning

confidence: 99%

Practical Guide for Building Superconducting Quantum Devices

Gao

Rol²,

Touzard

et al. 2021

PRX Quantum

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show abstract

“…RF qubit control pulses, which are typically 4-6 GHz are obtained by upconverting the AWG waveforms with analog mixers. These analog mixers come with a Local Oscillator (LO) leakage and imperfect sideband suppression [12], and their electrical properties vary with manufacturing tolerance and environmental effects. This demands a periodic calibration of the mixers to suppress unwanted image frequencies which is an overhead to the experiments [12].…”

Section: Introductionmentioning

confidence: 99%

“…These analog mixers come with a Local Oscillator (LO) leakage and imperfect sideband suppression [12], and their electrical properties vary with manufacturing tolerance and environmental effects. This demands a periodic calibration of the mixers to suppress unwanted image frequencies which is an overhead to the experiments [12]. This invites the need for a customized engineering solution that meets the requirement of the quantum computing community.…”

Section: Introductionmentioning

confidence: 99%

Generation of control signals using second-Nyquist zone technique for superconducting qubit devices

Singhal¹,

Kalipatnapu²,

Gautam³

et al. 2022

Preprint

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There is growing interest in developing integrated room temperature control electronics for the control and measurement of superconducting devices for quantum computing applications. With the availability of faster DACs, it has become possible to generate microwave signals with amplitude and phase controls directly without requiring any analog mixer. In this report, we use the evaluation kit ZCU111 to generate vector microwave pulses using the second-Nyquist zone technique. We characterize the performance of the signal generation and measure amplitude variation across second Nyquist zone, single-sideband phase noise, and spurious-free dynamic range. We further perform various time-domain measurements to characterize a superconducting transmon qubit and benchmark our results against traditionally used analog mixer setups.

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“…These solutions all use a conventional method by which the FPGA-controlled DAC synthesizes the IF envelope and is upconverted via IQ mixing with a local oscillator supplied by an analog RF source. More recently, a newer generation of RF DACs operates at high enough sampling rates that it becomes possible to directly synthesize microwave pulses without any kind of upconversion [25], eliminating the need for meticulous calibration [26].…”

Section: Introductionmentioning

confidence: 99%

The QICK (Quantum Instrumentation Control Kit): Readout and control for qubits and detectors

Stefanazzi

Treptow

Wilcer

et al. 2021

Preprint

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We introduce a Xilinx RFSoC-based qubit controller (called the Quantum Instrumentation Control Kit, or QICK for short) which supports the direct synthesis of control pulses with carrier frequencies of up to 6 GHz. The QICK can control multiple qubits or other quantum devices. The QICK consists of a digital board hosting an RFSoC (RF System-on-Chip) FPGA [1], custom firmware and software and an optional companion custom-designed analog front-end board. We characterize the analog performance of the system, as well as its digital latency, important for quantum error correction and feedback protocols. We benchmark the controller by performing standard characterizations of a transmon qubit. We achieve an average Clifford gate fidelity of F avg = 99.93%. All of the schematics, firmware, and software are open-source [2].

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Calibration of mixer amplitude and phase imbalance in superconducting circuits

Cited by 18 publications

References 19 publications

Practical Guide for Building Superconducting Quantum Devices

Practical Guide for Building Superconducting Quantum Devices

Generation of control signals using second-Nyquist zone technique for superconducting qubit devices

The QICK (Quantum Instrumentation Control Kit): Readout and control for qubits and detectors

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