- Skyrmions are ultra‑small magnetic swirls that stay stable even when the environment changes.
- This team made a tiny device that lets a skyrmion pass only in one direction, just like a diode lets current flow one way.
- This could give quantum computers a way to send information safely and efficiently on a chip, without extra power or noise.
In lab terms, Yingying Wu, Ph.D., is developing a skyrmion quantum diode based on skyrmion qubits. In simpler terms, this University of Florida researcher is working to reduce heat and energy for everyday, battery‑driven devices.
“It would be very helpful for quantum computing, quantum sensing and quantum communications,” said Wu, the Malachowsky Family Rising Star Endowed Assistant Professor with the Department of Electrical & Computer Engineering.
In a paper published recently in the Nature Partner Journal — better known as npj Spintronics — Wu and her students detailed this research, which centers on a skyrmion quantum diode prototype they developed that can become a tiny, zero‑energy valve that lets magnetic or quantum signals flow only one way in everyday electronics, thus lowering heat and power dissipation in memory‑tunable devices.
In short, it is designed to provide a non‑active, passive way to steer information with minimal energy, making battery‑driven devices cooler and more reliable.
“Magnetic skyrmions have long promised a revolution in low-power electronics. However, the transition from classical simulations to quantum-ready prototypes has been a major hurdle,” Wu noted. “In this paper, we demonstrate a functional skyrmion quantum diode prototype that effectively bridges this divide. This work paves the way for next-generation spintronic devices that leverage quantum mechanics for non-reciprocal transports, as well as the connection to superconducting quantum circuits.”
The project is part of Wu’s 2024 CAREER Award from the National Science Foundation, which supports her work to create new quantum hardware devices like magnetic transistors and diodes that use skyrmions. These devices are expected to be more energy-efficient and scalable, helping overcome some of the biggest obstacles in quantum computing.
The paper was co-authored by undergraduate student Haowen Yang, doctoral student Han Zhong and undergraduate students Gerald Bissell, Tiger Cao, Peter Van Kirk and Pengcheng Lu.
“Skyrmions are nanoscale, robust and topologically protected structures that can be transported with external electrical pulse. The skyrmion can be integrated into a logic device with lower energy consumption than the traditional charge-based electronics,” said Yang, one of the project leads. “Additionally, because the skyrmion diode we demonstrated can guide skyrmion-based signals unidirectionally, it could help prevent back-propagating noise and unwanted feedback between qubits or readout circuits.”
The next step, Wu said, is bringing this work to life in the lab.
“It may lead to a startup and more patents if our experiments go smoothly,” Wu said.