Reversible computing is the art of computing while deleting little information. Landauer's principle states that in order to delete a bit of information, one must expend k*T*ln(2) energy where k is Boltzmann's constant, T is the temperature, and ln(2)=0.693... which is the natural logarithm of 2. While this is not a lot of information, in practice, it takes much more energy to delete a bit of information, so we are approaching the limit. But since reversible computing deletes little information, reversible computation is not subject to Landauer's limit. This means that reversible computation will be much more energy efficient than the irreversible computation that we have today. In the past, reversible computation had little practical relevance since we were nowhere near Landauer's limit and because there were other ways of increasing the performance and energy efficiency of computation, but today that is not the case.
Vaire is a reversible computing startup with only a handful of people. Recently, Vaire computing has demonstrated all aspects of reversible computation (including the resonator) in a reversible shift register on a chip called Ice River with an energy recovery factor of 1.41. Any energy recover factor above 1 should be considered as a successful demonstration that reversible computation is a reality. I believe that this is the first time that this has been demonstrated in practice. Of course, some aspects of reversible computation have been demonstrated back in the 1990's, but I believe that this is the first time that they have a working resonator on a chip that gives an energy recovery factor for a shift register greater than 1.
The commenters here will probably say a lot of stupid shit because most people on this site are exceptionally stupid horrible people. If you are thinking about saying something really stupid, please don't do it. It is not good. People in general seem to put a lot more effort into hating reversible computation than they do into actually understanding it because most people are generally nasty blowhards. Unlike quantum computing and AI, reversible computing has not been hyped by the media or by anyone else even though reversible computation is the future of computation.
Here is a link explaining what Vaire has accomplished.
https://www.eetimes.com/vaire-demos-energy-recovery-with-reversible-computing-test-chip/Regards,
-Joseph Van Name Ph.D.
P.S. There was actually a reversible computation incident a few million years back. ++d's cat walked on the keyboard and pressed ctrl-R which made the entire simulation run in reverse. It took ++d about a thousand years to notice that something was off, and during that time, everything was running completely in reverse.
