Nature Communications · 25 September 2026 · From issue 42
Topological memory of nonreciprocal scattering singularities
In lab tests, a microwave device stored memory using special scattering points tied to magnetic history.
Haoye Qin, Zhe Zhang et al.
A microwave device can remember its own magnetic history through the way it scatters signals. Special points, where signals behave in unusual and sensitive ways, act as anchors for this memory. The magnetic history bends the signal's path so it loops around these anchor points, making sharp, countable jumps. Making the system strongly one directional made these special points much easier to reach and created richer patterns of extra frequencies.
Shows a lab device can hold sharp, countable memory states, not a usable memory chip.
Lab microwave hardware only, no consumer electronics tested yet.
Integrity screen: passed (3 checks) Checked 28 September 2026. Retraction record: none. DOI resolves at doi.org. Metadata record found (Nature Communications). Read the source
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