Bandwidth Archives - IEEE Transactions on Quantum Engineering

Mode-Manipulated Multimode Cavity for Quantum Memory

In this article, a quasi-elliptical geometry and the iris technique are applied to a multimode cavity to manipulate the resonant mode in the desired direction for quantum memories. By applying quasi-elliptical geometry, the characteristics of monotonically increasing, equally spaced, and monotonically decreasing frequency intervals between the modes are realized. To manipulate a certain mode, an […]

High-Fidelity Control of Superconducting Qubits Using Direct Microwave Synthesis in Higher Nyquist Zones

December 8, 2020William D. Kalfus; Diana F. Lee; Guilhem J. Ribeill; Spencer D. Fallek; Andrew Wagner; Brian DonoOpen AccessBandwidth, Hardware, Instruments, Logic gates, Qubit, Radio frequency, Superconducting microwave devices

Control electronics for superconducting quantum processors have strict requirements for accurate command of the sensitive quantum states of their qubits. Hinging on the purity of ultra-phase-stable oscillators to upconvert very-low-noise baseband pulses, conventional control systems can become prohibitively complex and expensive when scaling to larger quantum devices, especially as high sampling rates become desirable for […]