MIT discovers a new state of matter, a new kind of magnetism

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Researchers at MIT have discovered a new state of matter with a new kind of magnetism. This new state, called a quantum spin liquid (QSL), could lead to significant advances in data storage. QSLs also exhibit a quantum phenomenon called long-range entanglement, which could lead to new types of communications systems, and more.


Generally, when we talk about magnetism’s role in the realm of technology, there are just two types: Ferromagnetism and antiferromagnetism. Ferromagnetism has been known about for centuries, and is the underlying force behind your compass’s spinning needle or the permanent bar magnets you played with at school. In ferromagnets, the spin (i.e. charge) of every electron is aligned in the same direction, causing two distinct poles. In antiferromagnets, neighboring electrons point in the opposite direction, causing the object to have zero net magnetism (pictured below). In combination with ferromagnets, antiferromagnets are used to create spin valves: the magnetic sensors used in hard drive heads.

In the case of quantum spin liquids, the material is a solid crystal — but the internal magnetic state is constantly in flux. The magnetic orientations of the electrons (their magnetic moment) fluctuate as they interact with other nearby electrons. “But there is a strong interaction between them, and due to quantum effects, they don’t lock in place,” says Young Lee, senior author of the research. It is these strong interactions that apparently allow for long-range quantum entanglement.

Written By: Sebastian Anthony
continue to source article at extremetech.com

6 COMMENTS

  1. QSL’s sound very promising. If they’re able to use them to produce superconductors at say, room teperature, as the article suggests, this will revolutionise our world. Exciting stuff !

  2. Another step, another leap! I love it, if we humble ourselves we can see that we are only just beyond the Clovis people in terms of technology. When the first human discovered, probably by accident, that whacking a rock against another rock caused a sharp shard to splinter off and maybe open his arm like a modern blade.. eventually ending up with a truly cutting edge technology, ho ho. We are still a Type 0 civilisation burning fossil fuels and most of our population still lives in the Dark Ages and believe in sky gods. Very long way to go yet, I often wonder if there may be an absolute in terms of technology… I doubt it.

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