Tiny Seesaw Cooled Almost to Absolute Zero ⚡ экспресс
Original: "A Sub-kHz Mechanical Resonator Passively Cooled to 6 mK"
Physicists cooled a microscopic seesaw to 0.006 degrees above absolute zero—so cold that its swinging almost stopped, but not quite.
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A tiny beam weighing 1.5 nanograms was cooled to 0.006 degrees above absolute zero. At that temperature, its oscillations became barely noticeable, yet they still obey the laws of thermodynamics. This opens the door to sensors capable of catching a gravitational wave or a nudge from a single dark matter particle.
🎯 This seesaw is colder than the cosmic microwave background left over from the Big Bang (which is 2.7 K). In fact, it's one of the coldest artificial macroscopic bodies ever created.
🎬 Cooling an almost visible object to the edge of the quantum world is like trying to lock Schrödinger's cat in metal and silicon, where vibrations slow to a single particle's shiver.