We've been hearing a lot about what a genius Von Neumann was; and like many geniuses, such as Einstein, sometimes he informed us of barriers. In this case it's the limit on passing information across a conductive "electronic" circuit ... like passing memory around a CPU or, for that matter, over to the analog component. The main electronic barrier is Joule heating, less because it melts our circuits than because it attenuates the energy needed to juggle the data around. I don't know to what extent the effect affects superconductors; but you're not using such in your desktop PC.
On the other hand: The Oatmeal used to tell us that Nicolai Tesla was a genius too. Suppose we passed the information with electromagnetic waves. That's not electronics (nor photonics); that's "magnonics", outside those circuits entirely. New word for the day.
Anyone consider that the magnonic information could be dropped-in by Eve, though?
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