Overcoming DC Bias Supply Challenges in Quantum Computing Development
应用文章
Quantum computers have garnered significant attention in recent years for their ability to perform calculations efficiently in applications where traditional computers struggle. Research and development are rapidly advancing towards their future practical applications. The control and evaluation of qubits is the critical technology for quantum computing. Qubits can be initialized, controlled, and read by utilizing control evaluation systems, as depicted in Figure 1. This enables the characterization of qubit properties like coherence time and fidelity and the execution of benchmark tests, thereby advancing the research and development of quantum computers. Control and evaluation systems are complex configurations that include multiple measuring instruments, each with its own challenges arising from the unique requirements of quantum computing.
The theme of this application note, the DC voltage bias source, is one of the most critical measurement instruments in the qubit control and evaluation system in the flux-tunable superconducting qubit and silicon spin qubit. The flux-tunable superconducting qubit is used to tune the resonance frequency by the magnetic flux generated in the coil. It plays a pivotal role in characterizing the frequency tunability of this type of qubit. In the case of silicon spin qubits, an electron serves as a qubit, confined in quantum dots by the electrical potential of gate terminals. Here, the DC voltage bias source is employed to apply a static voltage to these terminals.
This application note focuses on the DC voltage bias source in the control and evaluation systems and introduces their challenges and solutions.