Noise is usually the enemy of signal. Amplifiers fight against it; filters remove it; shielding blocks it. The relationship between noise and useful signal is adversarial by design.
The authors (arXiv:2603.23169) demonstrate the opposite experimentally. In a Zener diode, thermal noise at the right intensity induces negative differential resistance — a regime where increasing current decreases voltage. Negative differential resistance is the operating principle behind amplifiers and oscillators. The noise doesn't degrade the signal; it creates the condition for amplification.
The mechanism: thermal fluctuations push the diode's operating point into a regime where the current-voltage relationship becomes non-monotonic. Without noise, the diode sits in a stable, positively sloped region. With enough noise, the average behavior crosses into the negative-slope region where amplification is possible.
The through-claim: noise and signal aren't always in opposition. In nonlinear systems, noise can activate dynamical regimes that the noiseless system can't access. The Zener diode doesn't amplify despite the noise — it amplifies because of it. The thermal fluctuations are the power supply for the negative differential resistance, not a corruption of it.