Abstracts

Miquel López Suárez
NiPS Laboratory, Dipartimento di Fisica e Geologia, Universitŕ degli studi di Perugia


Micro-electromechanical logic devices operated at thermodynamic limits

The erasure of one classical bit of information is a dissipative process.
The minimum heat produced during this operation has been theorized by Rolf Landauer in 1961 to be equal to kB T ln2 (approximately 2.75 zJ at room temperature) and takes the name of Landauer limit. The same reasoning used to obtain the Landauer limit has been used in the past to theorize a fundamental bound in operating irreversible logic operations.
In this work, we will show how micro-electromechanical systems (MEMS) can be used as memory devices and logic gates. We will then evaluate the energetic expenditure to operate such devices showing that the memorization process, starting from an unknown state, is bounded by the Landauer limit. Irreversible logic gates (e.g. an OR gate), on the contrary, can be operated with arbitrarily low energy provided the operation is slow enough and frictional phenomena are properly addressed.




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