Fast, Energy-Efficient Control of Superconducting Circuits Using Gate Voltage

What is it about?

Our paper explores dynamic control of superconducting circuits using gate voltage on niobium Dayem bridges. We compare two gate configurations—side-coupled (type-A) and remote injector (type-B)—finding that type-B offers faster, more efficient switching due to phonon-mediated processes. These findings highlight the potential for high-speed superconducting logic and quantum processing applications.

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Why is it important?

Our measurements pave the way for developing superconducting microwave devices that can be switched at hundreds of megahertz. This enables low power dissipation, fast actuation, and control using gate voltage, offering an attractive alternative to RSFQ logic for faster and more energy-efficient superconducting circuits.