Quantum and reversible logic circuits have more advantages than the common circuits, like low power consumption. These circuits are good choice to design future computers. One of the important issues in reversible logic is parity preservation. If parity of inputs and outputs are equal in reversible gate, this gate will be parity preserve. Reversible circuits made by these gates are parity prese...

quantum dot cellular automata (qca) is one of the important nano-level technologies for implementation of both combinational and sequential systems. qca have the potential to achieve low power dissipation and operate high speed at thz frequencies. however large probability of occurrence fabrication defects in qca, is a fundamental challenge to use this emerging technology. because of these vari...

I make a rough estimate of the accuracy threshold for fault tolerant quantum computing with concatenated codes. First I consider only gate errors and use the depolarizing channel error model. I will follow P.Shor [1] for fault tolerant error correction (FTEC) and the fault tolerant implementation of elementary operations on states encoded by the 7-qubit code. A simple computer simulation sugges...

Implementing a unitary operation using a universal gate set is a fundamental problem in quantum computing. The problem naturally arises when we want to implement some quantum algorithm on a fault tolerant quantum computer. Most fault tolerant protocols allow one to implement only Clifford circuits (those generated by CNOT, Hadamard and Phase gates). To achieve universal quantum computation one ...

A Fault tolerant reversible logic has gained importance as they consume low power and less heat dissipation. The benefits of logical reversibility can be gained only after employing physical reversibility. Every future technology will have to use reversible gates in order to reduce power. This paper proposed a new fault tolerant reversible 4*4 RR-gate which satisfies the reversible and parity p...

At its most fundamental level, circuit-based quantum computation relies on the application of controlled phase shift operations on quantum registers. While these operations are generally compromised by noise and imperfections, quantum gates based on geometric phase shifts can provide intrinsically fault-tolerant quantum computing. Here we demonstrate the high-fidelity realization of a recently ...

Threshold Logic gate is used as design abstraction for most nano devices and perceived as an alternate emerging technology to CMOS implementation. It is vulnerable to manufacturing inaccuracies that alter weight values which inadvertently affect the functionality of the gate. Hence fault tolerance should be taken in to consideration during the design of threshold logic gates to tolerate manufac...

This paper proposes an approach to design a cost-eeective domain-speciic fault-tolerant computing architecture that can dynamically meet the fault tolerance requirements of applications and their performance requirements. The design is based on eld-programmable gate array technology.

Reversible logic is emerging as an important research area having its application in diverse fields such as low power CMOS design, digital signal processing, cryptography, quantum computing and optical information processing. This paper presents a new 4*4 parity preserving reversible logic gate, IG. The proposed parity preserving reversible gate can be used to synthesize any arbitrary Boolean f...

This paper demonstrates the reversible fault tolerant logic synthesis for the Field Programmable Gate Array (FPGA) and its realization using MOS transistors. Algorithms to design a compact reversible fault tolerant n-to-2 decoder, 4n-to-n multiplexers, a random access memory and a Plessey logic block of the FPGA have been presented. In addition, several lower bounds on the numbers of garbage ou...