Abstract
Superconducting quantum processors are manufactured based on a semiconductor process, which makes qubit integration possible. At the same time, this kind of qubit exhibits high-performance fidelity and decoherence time and requires a programmable arbitrary waveform generator (AWG). This paper presents the implementation of an AWG with a sampling rate of two-gigabit samples per second as well as 16-bit vertical resolution digital-to-analog converters. The AWGs are designed for a scaled-up usage scenario by integrating them with separate microwave devices onto a single backplane. A special waveform sequence output controller is designed to realize seamless waveform switching and arbitrary waveform generation. The jitter of multiple AWG channels is around 10 ps, and the integral nonlinearity and differential nonlinearity are both about 2 least significant bits. This customizable AWG has been used in several superconducting quantum processors, and the result of multiple qubits’ measurement verifies that the AWG is qualified for controlling tens of superconducting qubits.
Highlights
Superconducting qubits exhibit excellent performance in fidelity, decoherence time, and integration, making them one of the most feasible quantum computing schemes
This paper presents the implementation of an arbitrary waveform generator (AWG) with a sampling rate of two-gigabit samples per second as well as 16-bit vertical resolution digital-to-analog converters
We introduce a scalable and highly integrated AWG array for a superconducting quantum computing control system
Summary
Superconducting qubits exhibit excellent performance in fidelity, decoherence time, and integration, making them one of the most feasible quantum computing schemes. Superconducting quantum computing control systems are composed of multiple independent parts, including switching networks, clocks and synchronizations, qubit controls, qubit readouts, biases, and hosts. Each control unit is formed by arbitrary waveform generators (AWGs), filters, differential amplifiers, power splitters (PWD), and high-precision DC sources. These components can be used flexibly in accordance with the qubit control requirements. An effective control device of this nature requires a highly customized system Several groups, such as those in UCSB, IBM, ETH Zurich, Yale, and BBN Technologies, have recently implemented superconducting quantum computing control platforms.. In order to realize large-scale production of quantum computer, it is desirable to develop a programmable, compact, and extensible AWG. To validate the AWG design, we conduct a series of tests on the AWG and use it for controlling multiple superconducting processors
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