English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In a recent paper M. Lopez-Suarez, I. Neri, and L. Gammaitoni (LNG) present aconcrete realization of the Boolean OR irreversible gate, but contrary to thestandard Landauer principle, with an arbitrary small dissipation of energy. APopperian good falsification! In this paper we discuss a theoreticaldescription of the LNG device which is indeed a 3in/3out self--reversiblerealization of the involved OR gate, satisfying in this way the Landauerprinciple of no dispersion of energy, contrary to the LNG conclusions. Thedifferent point of view is due to a different interpretation of the two outputscorresponding to the inputs 10 and 01, which are considered by LNGindistinguishable so producing a non reversible realization of the standard2in/1out gate. On the contrary, always considering these two outputsindistinguishable, by a suitable normalization function of the cantileverangles, the experimental results obtained by the LNG device coincide with theOR connective obtained from the third output of the self-reversible 3in/3out CLgate by the Inputs-Ancilla->Garbage-Output procedure. Thus, by theself-reversibility this realization is without dissipation of energy accordingto the Landauer principle. Furthermore, using the self-reversible Toffoli gateit is possible to obtain from the LNG device the realization of the connectiveAND adopting another normalization function on the cantilever angles. Finally,by other suitable normalization procedures on cantilever angles it is possibleto obtain also the other logic NOR and NAND connectives, and in a moresophisticated way the XOR and NXOR connectives in a self-reversible way. Allthis leads to introduce a universal logic machine consisting of the LNG deviceplus a memory containing all the necessary angle normalization functions toproduce in a self-reversible way, by choosing one of these latter, the logicconnectives now listed.

A discussion about LNG Experiment: Irreversible or Reversible Generation of the OR Logic Gate?