Erasing bits consumes power. You'll probably want to start investigating conservative logic:
>Conservative logic is a comprehensive model of computation which explicitly reflects a number of fundamental principles of physics, such as the reversibility of the dynamical laws and the conservation of certain additive quantities (among which energy plays a distinguished role). Because it more closely mirrors physics than traditional models of computation, conservative logic is in a better position to provide indications concerning the realization of high-performance computing systems, i.e., of systems that make very efficient use of the "computing resources" actually offered by nature. In particular, conservative logic shows that it is ideally possible to build sequential circuits with zero internal power dissipation
https://www.cs.princeton.edu/courses/archive/fall06/cos576/p...
...and also reversible computation:
https://spectrum.ieee.org/the-future-of-computing-depends-on...
if anyone knows better I would like to know why or why not this is an possibility