One membrane – two mysteries of the Universe ⚡ экспресс

Imagine a membrane stretched like the skin of a drum. It picks up two signals at once: gravitational waves — the trembling of space itself — and elusive particles of dark matter. The membrane is placed between mirrors, and light presses on it like a finger on a string, keeping it under constant tension. When a gravitational wave arrives, the distance between mirrors barely changes, and the membrane starts to vibrate. By adjusting the light pressure, the membrane's frequency can be tuned nearly two-fold — this way one set of membranes hears the whole range from a low hum to a high whistle.

To search for dark matter, a small plate of a different material is suspended next to the membrane. Invisible particles push them with different forces — like wind that playfully shakes a light leaf but barely touches a stone. The microscopic discrepancy in the motion of these objects reveals the presence of dark matter, even if it lies beyond the Standard Model — the familiar set of known particles.

Sensitivity is astonishing: the device detects oscillations whose amplitude is a thousand times smaller than the size of a proton. One membrane simultaneously listens to the hum of black holes and sniffs the breeze of dark wind — a rare case where a single experiment tackles two of the greatest mysteries.