Quantum Cellular Automata

QUANTUM CELLULAR AUTOMATA

The continuing down‒scaling of device dimensions in microelectronics technology has led to faster devices and denser circuit with obvious benefits to chip performance.

There is now much expectation that the availability of very dense device arrays might lead to a new paradigms for information processing based on locally‒interconnected architectures such as cellular automata (CA).

We focus here on the idea of employing CA architectures which are compatible with nanometer scale quantum devices.

Quantum Cellular Automata (QCA) is a new nanotechnology with the pot for applying in building future computers. This technology is a realization of the circuit design at the Nano‒scale.

Quantum Cellular Automata (QCA) technology is one of the emerging technologies that can be used for replacing CMOS technology. It has attracted significant attention in the recent years due to its extremely low power dissipation, high operating frequency, and smaller in size.

Definition

A Quantum Cellular Automata consist of an array of quantum device cells in a locally interconnected architectures.

Concept

According to Quantum Cellular Automata (QCA), logical STATES or values are demonstrated by the position of electrons rather than voltage levels. By applying proper implements of this QCA technology, significant low density of 10¹² devices/cm² and very low power consumption (near to zero) are achievable.

Thus quantum cellular automata (QA) is an abstract model of quantum computation devised in analogy to conventional models of cellular automata.

Advantages

1. Low power dissipation

2. High operating frequency.

3. Smaller in size.

4. It replaces CMOS technology.

Applications

1. This Quantum Cellular Automata (QCA) technology can be used for designing general purpose computational circuits.

2. It is also used in memory circuits and other combinational & sequential circuit designs.