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原始链接: https://news.ycombinator.com/item?id=43715790

Hacker News的用户正在讨论一个旨在寻找暗物质(特别是轴子)的“宇宙射电”探测器,预计在未来15年内投入使用。一位名为pavel_lishin的用户请求对探测器的运作原理进行简化解释。该探测器名为AQ,工作频率为太赫兹,设计目标是与轴子的频率匹配。当它探测到该频率时,会发出少量光。 pyinstallwoes用共振的比喻进行了回应:想象一下房间里有两把吉他。拨动其中一把吉他的A弦,会引起另一把吉他的A弦振动。这种“超距作用”说明了AQ探测器是如何“调谐”到轴子的频率并探测其存在的。


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'Cosmic radio' detector could discover dark matter within 15 years (phys.org)
7 points by rbanffy 2 hours ago | hide | past | favorite | 2 comments










> The AQ is designed so its frequency can be transmitted into space, a frequency that would match with the axion. When it identifies and 'tunes in' to that frequency, it will emit very small amounts of light. AQ operates at the highest terahertz frequencies, which many researchers believe to be the most promising place to look for axions.

Can someone explain this using an analogy that makes sense?



Sympathetic resonance. Two guitars in a room, pluck the A string of one, the other A string will vibrate. “Spooky action at a distance”






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