Helmholtz researchers discover ultra low energy Floquet states in magnetic vortices for future quantum integration

Helmholtz researchers uncover Floquet states in magnetic vortices, offering an ultra-low energy way to link electronics and quantum computing.

By: AXL Media

Published: Mar 28, 2026, 5:39 AM EDT

Source: Information for this report was sourced from ScienceDaily

The Discovery of Exotic Oscillation in Nanomagnets

Inside extremely small magnetic structures known as vortices, researchers have uncovered previously unseen oscillation patterns that could redefine how information is transmitted in future computing systems. These vortices form in ultrathin metallic disks, where magnetic moments align in circular patterns similar to miniature compass needles. When these systems are disturbed, they create collective wave like excitations called magnons. According to Dr. Helmut Schultheiß, project leader at HZDR, these magnons are capable of transmitting information without the need for traditional electrical charge transport, making them a primary focus for next generation energy efficient technology.

Unexpected Frequency Combs in Miniature Disks

The breakthrough occurred while the Dresden team was experimenting with shrinking magnetic disks from several micrometers down to just a few hundred nanometers. The original intent of the study was to explore neuromorphic computing, which seeks to mimic the processing power of the human brain. However, during the analysis of the data, the scientists noticed a series of closely spaced resonance lines rather than a single sharp signal. This phenomenon, known as a frequency comb, was initially dismissed as a measurement artifact before repeated experiments confirmed that it was a genuine physical effect occurring within the smaller disks.

Floquet Theory Applied to Magnetic Vortices

The explanation for these signals dates back to the 19th century work of mathematician Gaston Floquet, who proposed that systems subjected to periodic forces could develop entirely new states of oscillation. Historically, generating these Floquet states required massive energy inputs, such as intense and high powered laser pulses. In this new study, researchers found that magnetic vortices naturally produce these states when magnons transfer a small amount of energy to the vortex core. This causes the core to move in a tiny circular path, providing the rhythmic force necessary to transform the standard magnon spectrum into a complex array of new states.