Computação Binária Reversível

Abstract

According to Rolf Landauer, instruction processing conventionally occurs irreversibly, where for each instruction processed by a chip there is energy dissipation in the form of heat with the environment (neighborhood) in which it is embedded. In turn, this changes the entropy of the system so that at the end of each execution the total entropy changes, and may, at the end of the entire processing, be different from that initially presented. Therefore, the motivation arises to search for some methodology to reduce such losses, where for each instruction processed it is possible to reduce some of the energy used for such operations. To this end, the entropy was made constant at the end of the entire processing through the use of bijection. Regarding circuits built based on logic gates, this work proposes to reduce the energy impact caused by the irreversible processing of instructions in order to propose adaptations in traditional logic gates so that they can continue to be used for the same purposes, but that also support technologies to reduce energy expenditure in the form of heat. Once the reversibility property is implemented in conventional logic gates, based on thermodynamic properties, the energy consumed by the system is reduced. Once this point is reached, it is estimated that processing steps can be performed in a way that does not generate heat by taking advantage of the fact that no energy is spent in a perfectly isolated reversible process. Therefore, the desire to make this feat real was one of the motivations behind this work.