Reversible logic enables ultra-low power circuit design and quantum computation. Quantum-dot Cellular Automata (QCA) is the most promising technology considered to implement reversible circuits, mainly due correspondence between features of QCA circuits. This work aims push forward state-of-the-art QCA-based circuits implementation by proposing a novel full adder\full subtractor (FA\FS). At fir...

Application of quantum-dot is a promising technology for implementing digital systems at nano-scale.  Quantum-dot Cellular Automata (QCA) is a system with low power consumption and a potentially high density and regularity. Also, QCA supports the new devices with nanotechnology architecture. This technique works </...

Nanotechnology is derived from the evolution of microelectronics towards miniaturization. CMOS Technology has been targeted to integrate more and more Devices per unit area of Silicon-substrate, but there is limitation in scaling-down CMOS Circuits/Devices. Like Nanotechnology, QCA (Quantum-Dot Cellular Automata) is another alternate Technology having ability to reduce the Device-sizes beyond t...

Further downscaling of CMOS technology becomes challenging as it faces limitation of feature size reduction. Quantum-dot cellular automata (QCA), a potential alternative to CMOS, promises efficient digital design at nanoscale. Investigations on the reduction of QCA primitives (majority gates and inverters) for various adders are limited, and very few designs exist for reference. As a result, de...

Quantum-dot Cellular Automata (QCA) seek potential benefits over CMOS devices such as low power consumption, small dimensions, and high speed operation. Two prominent QCA concerns of wire crossing complexity and circuit robustness are addressed by developing a three-step Bilayer Logic Decomposition (BLD) methodology to design QCA-based logic circuits. The partitioning of QCA computing operation...

Quantum-dot cellular automaton (QCA) is a novel nanotechnology that provides a very different computation platform than traditional CMOS, in which polarization of electrons indicates the digital information. This paper demonstrates designing combinational circuits based on quantum-dot cellular automata (QCA) nanotechnology, which offers a way to implement logic and all interconnections with onl...

Due to the development of integrated circuits and lack responsiveness existing technology, researchers are looking for an alternative technology. Quantum-dot cellular automata (QCA) technology is one promising alternatives due its higher switch speed, lower power dissipation, device density. One most important widely used in digital logic calculations full adder (FA) circuit, which actually cre...

In recent years low power and small size are the keyword in the IC industry. This is where the importance of reversible gate and QCA (Quantum dot cellular automata) comes in. In nonreversible gates there is a definite amount of power loss involved. Interest in reversible computation arises from the desire to reduce heat dissipation, thereby allowing – higher densities and higher speed. The QCA ...

We establish a method for exploring the dynamics of molecular quantum-dot cellular automata QCA devices by hierarchically combining the techniques of quantum chemistry with the nonequilibrium time-dependent coherence vector formalism. Single QCA molecules are characterized using ab initio quantum chemistry methods. We show how to construct a simple model Hamiltonian for each QCA cell based on p...

Quantum-Dot Cellular Automata (QCA) are an emerging field-coupled nanotechnology with remarkable performance and energy efficiency. In order to enable the exploration of this technology, we propose a model for the logic synthesis of QCA circuits that, for the first time, considers and abstracts all main physical aspects—in particular, energy dissipation. To this end, we review in detail how ene...