# Researchers demonstrate high-frequency charge detection in 2D quantum devices

_Published Tuesday, October 20, 2026 at 8:18 AM EDT · Science · Latest · Tier 2 — Notable_

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Researchers at Tohoku University and Japan's National Institute for Materials Science demonstrated sensitive, high-frequency charge detection in quantum devices made from two-dimensional materials. The technique addresses high electrical resistance that has hindered fast measurements of these devices.

The team integrated a variable capacitor made from strontium titanate into a high-frequency resonant circuit. This matched the circuit's electrical impedance to the devices closely enough to detect individual electrons entering and leaving a quantum dot.

The system remained stable under a perpendicular magnetic field, a required operating condition for spin-valley qubits. The demonstrated capability concerns charge detection, which supports the repetitive measurements needed to develop these quantum devices.

## Sources

- [Newswise](https://www.newswise.com/articles/new-high-frequency-method-boosts-2d-material-readout-for-next-gen-quantum-computers/?ad2f=1&aid=856922)

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Canonical: https://techandbusiness.org/newswire/UBfamoJ7aHZBe8ZzLV-yfQ
Published: 2026-10-20T12:18:01.870Z
Story chronology: 2026-10-20T11:25:00.000Z
Retrieved: 2026-10-20T15:24:10.469Z
Publisher: Tech & Business (techandbusiness.org)