Quantum-dot Cellular Automata (QCA) has emerged as one of the alternative technologies for current CMOS technology. It advantage computing at a faster speed, consuming lower power, and work Nano- Scale. Besides these advantages, QCA logic is limited to its primitive gates, majority voter inverter only, results in limitation cost-efficient circuit realization. Numerous designs have been proposed...

Low power dissipation, high packaging density and operation at Tera-hertz frequencies are highly desired features in the design and fabrication of logic circuits. Promising realization of these highly desired features have made Quantum dot Cellular Automata (QCA) a prospective replacement to the conventional CMOS technology for the fabrication of logic circuits in nano scale range. The traditio...

A novel universal QCA gate is introduced and called a boundary comparator. This gate implements a Boolean function in its boundary form, as a superposition of elementary boundary functions or as threshold functions having weights equal to integer powers of 2. An array of the boundary comparators is called Comparator based Programmable Array (CPA) and forms a homogeneous regular structure progra...

Devices based on Quantum-dot Cellular Automata (QCA) computational approach [ 11 use interacting quantum dots to encode and process binary information. In this transistorless approach to computation, logic levels are represented by the configurations of single electrons in coupled quantum-dot systems. In the last few years, significant progress has been made towards the realization of basic QCA...

Quantum-dot cellular automata (QCA) is an emerging technology proposed in response to the limitations of CMOS technology. Moreover, static RAM (SRAM) crucial for memory design, and efficient design can play a significant role. This paper proposes fault-tolerant QCA SRAM cell based on three- five-input majority gates. implemented single layer does not require any rotated cell, which significantl...

In this paper, a novel efficient method for optimizing multi-output majority gate based designs is proposed. Majority gate is a fundamental Boolean operator in some nano-scale technologies such as quantum-dot cellular automata (QCA). As a result, the design optimization must be directly implemented on majority gates instead of optimizing the design for AND–OR gates. In some other nanotechnologi...

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...

Here we discuss a new concept within the general trend of molecular implementation of quantum cellular automata (QCA). We propose to employ complex polyoxometalate (POM) anion [V IV 8V V 4As8O40(H2O)] 4– (briefly V12) as a quantum inverter. As distinguished from previous ideas on the molecular QCA, in which a molecule was supposed to act as a quantum cell, the proposal reported here employs POM...

A simple architecture for data input into a molecular quantum-dot cellular automata (QCA) circuit from an external CMOS circuit is proposed. A “T”-shaped interconnect, utilizing fixed-polarization cells to provide the desired polarization, is controlled via external electrodes connected to a standard CMOS input driver. The applied input signal is used to gate either the propagation of a fixed p...

A decoder is important component of memory, for address decoding and encoding. The size of Complementary Metal Oxide Semiconductor (CMOS) transistor keeps shrinking to increase the density on chip in accordance with Moore’s Law. The scaling affects the device performance due to constraints like heat dissipation and power consumption. A Quantum dot Cellular Automata (QCA) is an alternative to CM...