Article history: Received 20 May 2013 In final form 9 July 2013 Available online 16 July 2013 Molecular quantum-dot cellular automata (QCA) paradigm is a promising approach to molecular electronics. QCA cells can be implemented using mixed-valence compounds. However, the existence of counterions can perturb the local electric field and thus is detrimental to information encoding and processing....

Quantum dot Cellular Automata (QCA) technology is a possible CMOS substitute. It requires a clock-like signal to assure information propagation. This likens a QCA circuit to a fully pipelined architecture, where pipeline depth is layout dependent. Only asynchronous organization of architectural blocks enables the realization of complex circuits. The use of Null Convention Logic (NCL) is one amo...

Quantum-dot cellular automata (QCA) are one of the most promising alternative platforms of the future. Recent years have witnessed the development of basic logic structures as well as more complex processing structures, however most in the realm of binary logic. On the grounds that future platforms should not disregard the advantages of multi-valued logic, Lebar Bajec et al. were the first to s...

Molecular-based quantum cellular automata (m-QCA), as an extension of quantum-dot QCAs, offer a novel alternative in which binary information can be encoded in the molecular charge configuration of a cell and propagated via nearest-neighbor Coulombic cell-cell interactions. Appropriate functionality of m-QCAs involves a complex relationship between quantum mechanical effects, such as electron t...

I. Outline 1 II. Glossary 2 III. Definition of the subject and its importance 2 IV. Introduction 2 V. Cellular Automata 3 A. Reversible Cellular Automata 4 VI. Early proposals 4 VII. Definition 6 VIII. Models of QCA 6 A. Reversible QCA 6 B. Local unitary QCA 7 C. Block-partitioned and nonunitary QCA 7 D. Continuous-time QCA 8 E. Examples of QCA 8 IX. Computationally universal QCA 9 X. Modeling ...

We perform measurements on an AlGaAs/GaAs double-quantum-dot structure, where dots are separated by an opaque barrier and each dot conductance is measured independently and simultaneously. We measure the Coulomb blockade oscillations ~CBOs! for each dot when the structure is configured for one and two dots. When configured as a single-dot device, we sweep the backgate and observe different CBO ...

Quantum dot cellular Automata technology is used in this paper which overcomes the design constraints of nanoscale CMOS circuits. This paper presents the analysis of 2:4 decoder circuit using four different methodologies. QCA based Decoder circuit is implemented using coupled majority voter minority gate, 45 0 rotated cells, multilayer wire crossings and five input Majority Voter gate. Comparat...

We present an experimental demonstration of a latch in a clocked quantum-dot cellular automata ~QCA! device. The device consists of three floating micron-size metal dots, connected in series by multiple tunnel junctions and controlled by capacitively coupled gates. The middle dot acts as an adjustable barrier to control single-electron tunneling between end dots. The position of a switching ele...

Integrated Circuit (IC) Technology is growing day by day to enhance the circuit performance and to increase the density for compact systems. Conventional CMOS technology is playing a vital role in digital computation for past four decades. But there are certain challenges in scaling the CMOS devices for the last few years. A novel technology “Quantum dot Cellular Automata (QCA)” has been identi...