Quantum-dot cellular automata

Citation
Gl. Snider et al., Quantum-dot cellular automata, J VAC SCI A, 17(4), 1999, pp. 1394-1398
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS
ISSN journal
07342101 → ACNP
Volume
17
Issue
4
Year of publication
1999
Part
1
Pages
1394 - 1398
Database
ISI
SICI code
0734-2101(199907/08)17:4<1394:QCA>2.0.ZU;2-G
Abstract
An introduction to the operation of quantum-dot cellular automata (QCA) is presented, along with recent experimental results. QCA is a transistorless computation paradigm that addresses the issues of device density and interc onnection. The basic building blocks of the QCA architecture,:such as AND, OR, and NOT are presented. The experimental device is a four-dot QCA-cell w ith two electrometers. The dots are metal islands, which are coupled by cap acitors and tunnel junctions. An improved design of the cell is presented i n which all four dots of the cell are coupled by tunnel junctions. A noninv asive electrometer is presented which improves the sensitivity and linearit y of dot potential measurements. The operation of this basic cell is confir med by an externally controlled polarization change of the cell. (C) 1999 A merican Vacuum Society. [S0734-2101(99)07104-3].