Von Neumann-Landauer limit

The usual extropian retort to this limit has been &quot;reversible computing,&quot; but as far as I can tell there has been little work on reversible computing hardware -- far less than quantum computing. It looks like the University of Florida made some hardware in the early 2000s. Can anyone offer insights about why hardware research is so scarce here? Are there reasons to think it&#x27;s a dead end prior to fabricating anything?<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Reversible_computing" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Reversible_computing</a><p>EDIT: searching Google Scholar, it looks like only ~50 papers&#x2F;books mention reversible computing in the past year, compared to 1000+ for quantum computing.

I picked up <i>The Information</i> by James Gleick when I was visiting the Living Computers Museum + Labs in Seattle[1]. Really interesting book... talks about the development of language, the birth of computing, the concept of randomness, the physics of information, etc. A fascinating and comprehensive overview of the topic.<p>[1] This place is awesome and you should check it out if you&#x27;re in the area: <a href="http:&#x2F;&#x2F;www.livingcomputers.org" rel="nofollow">http:&#x2F;&#x2F;www.livingcomputers.org</a>

I remember reading Feynman&#x27;s thought experiment and him deciding that it doesn&#x27;t require <i>any</i> energy to flip a bit.[1]<p>How does that square with Landauer&#x27;s limit?<p>[1] Apologies for the lack of reference. I&#x27;ll try and find it.

I believe there is some breakthrough yet to be found in the intersection of entropic gravity and computational limits.

As interesting as it is to think about the limit, it&#x27;s so pointless from a practical point of view since the cost of computation is dwarfed by the cost of data movement in modern machines.

As inspiring as thought provoking.

Related discussion<p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=14002160" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=14002160</a><p><a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=14146677" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=14146677</a>

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So you&#x27;re telling me ignorance can combat global warming?