**Molecular Architectures for QCA-inspired Boolean Networks**

#### Project coordinator : Prof. Rosaria Rinaldi

CNR NANO – Lecce (ITALY)

### Concept and objective

MolArNet aims at demonstrating a feasible molecular scale architecture for post-Moore nano-electronics as a possible route towards unconventional models of computation.

The final goal is a first demonstration of feasibility for molecular Quantum Cellular Automata (QCA) elementary devices, working on both technological and design levels.

In QCA no switches (transistors) and hence no current flow are required. Computation is still binary and Boolean, but the bit is represented through the charge configuration in a basic cell, which, in the classical case, is an arrangement of four quantum dots, joined by tunneling paths and charged with two mobile, opposite-spin electrons and a compensating fixed positive charge.

The two different polarizations are represented in figure:

Within MolArNet, some of the key problems of molecular QCA will be tackled in such a way as to prove their feasibility and trace precise future research directions. In particular, we will show:

- Proof-of-concepts of molecular QCA cells.
- Proof-of-concepts of read-out devices at the few-cell scale.
- Proof-of-concepts of fabrication of small molecular QCA devices.
- Theoretical investigation of the tested molecules as QCA cells, with quantitative study of the critical engineering issues and the impact of molecular non-idealities on the computing paradigm.