Fault-tolerant quantum-dot cellular automata linear feedback shift register for nano communication applications

Abstract

There has been remarkable research carried out on Nano-electronics where Quantum dot Cellular automata appearing as the next generation computing regimes. The QCA-based circuits are used in the quantum computational hardware to represents the quantum computations and integrated in the Nano Communication system. The research is carried out on various QCA based designs. The purpose of this paper is to design the novel 5-input majority gate which is fault tolerant and simulated under various defects. The kink energy of the proposed cell is carried out and for verification of its functionality physical proof is provided, which demonstrates the redundant version of the proposed design. The QCA cell defects were consciously implemented in the proposed structure to prove its novelty as the best candidate for the implementation of complex QCA circuits. The proposed structure is further utilized to construct the fault-tolerant XOR gate and fault-tolerant D flip flop. The fault-tolerant linear feedback shift register is constructed with 435 QCA cells which is prone to various defects described in this paper. The contribution of this paper is to construct the fault-tolerant circuit for the various Nano Communication application that utilizes the quantum computational algorithm.

Keywords

• Quantum cellular automata (QCA)
• Majority logic
• QCA designer
• Flip flop (FF)
• Clock (Clk)
• QCA cell defects