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TraditionalRationali comments on [LINK] An amazing breakthrough in wireless communication, or a pipe dream? - Less Wrong
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Yes. The orbital angular momenta spans the same space as the linear momenta, so it cannot add anything in principle to MIMO and similar. (Practical issues can of course in some cases make the one or the other basis more effective under various circumstances.)
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Not correct! Linear momentum and angular momentum are entirely different things. This was shown by Euler already 1776. Any good mechanics book will show why. Read the books by Clifford Truesdell to get all the details right.