Developing a Spin-Based Ultra-Low-Noise Amplifier for Microwave Quantum Technologies

As part of the OIST Proof of Concept program, researchers from the Hybrid Quantum Device Team led by Dr. Yuimaru Kubo have been developing an ultra-low-noise amplifier based on the stimulated emission of impurity spins in gem crystals. By using this approach, Dr. Kubo's team is creating a new type of maser-based device that can amplify microwave signals at millikelvin temperatures and with a saturation power much larger than that of existing, state-of-the-art superconducting Josephson parametric amplifiers — without adding noise and even in a modest magnetic field.

Beyond applications in ultra-sensitive magnetic resonance spectroscopy, this new amplifier could transform the field of cryogenic microwave quantum technologies and lead to the creation of scalable quantum computing hardware systems.

Speaker: Dr. Yuimaru Kubo, Science and Technology Group