Reversible logic technology has the most promising role in quantum computing. With the evolution of high-performance computing devices, future processors are focusing on quantum technology for their development and fabrication. This work focuses on the development of a novel digital processor with memory via parity-preserving reversible logic gates and quantum cellular automaton (QCA). The design and realization of the integral components of the digital processor have been performed with reversible KMD gates. The processor’s main modules include the ALU, multipliers, floating-point division unit, control unit, and memory unit. It has a control unit to monitor and control the operation of the processor. The QCA design of individual modules of the developed processor is carried out with appropriate multilayer wire crossing. The performances of the individual models of the processor are compared and analyzed with those of existing designs. The reversible processor has 891 quantum costs, 141 constant inputs, and 188 garbage outputs; it needs 120 reversible gates and 1397 total costs. The results show that the developed processor modules are better than the existing modules, as the appropriate use of reversible logic gates for modern-day high-performance, economical and low-power-consumption processors.
Reversible logic technology has the most promising role in quantum computing. With the evolution of high-performance computing devices, future processors are focusing on quantum technology for their development and fabrication. This work focuses on the development of a novel digital processor with memory via parity-preserving reversible logic gates and quantum cellular automaton (QCA). The design and realization of the integral components of the digital processor have been performed with reversible KMD gates. The processor’s main modules include the ALU, multipliers, floating-point division unit, control unit, and memory unit. It has a control unit to monitor and control the operation of the processor. The QCA design of individual modules of the developed processor is carried out with appropriate multilayer wire crossing. The performances of the individual models of the processor are compared and analyzed with those of existing designs. The reversible processor has 891 quantum costs, 141 constant inputs, and 188 garbage outputs; it needs 120 reversible gates and 1397 total costs. The results show that the developed processor modules are better than the existing modules, as the appropriate use of reversible logic gates for modern-day high-performance, economical and low-power-consumption processors.
In the current scenario, power consumption, speed, size and heat dissipation are the huge challenge in the semiconductor industries. When the size of the single computing element is reduced then the speed can be improved and also if the power dissipation is reduced then the heat dissipation will be less. The possible solution for these two problems is the Reversible Logic and Quantum Cellular Automata (QCA). The Reversible Logic is considered to be the promising technology to the future Quantum computer technologies. The Reversible Logic gates prune the power dissipation to a larger extent. In this paper Novel Reversible Gates are proposed with Reversibility and Universality. The Arithmetic and Logic Unit (ALU) is designed with the proposed Reversible Gates in Reversible Logic. The designed Arithmetic and Logic unit is evaluated in QCA with the required specifications. The Arithmetic and Logic Unit is designed by setting the control inputs for each unit. The parameters taken into account are Quantum Cost (QC), Garbage Outputs (GO), Constant Inputs (CI), Area, Number of Cells and Simulation Time. The proposed ALU adopting Novel gates finds utilization in low power applications. Also it can be used as the module in the Quantum computers due to its reduced Quantum Cost and Garbage outputs. The Proposed design extends its applications over Quantum Computing, Optical Computing, Nanotechnology and DNA mapping.
The NAND, NOT, and NOR logic gates which are utilised to realise the hardware modules of the system, are examples of basic classical logic gates that make up the hardware basics of electronic circuit systems. In addition to this, a useful system has been described for designing and implementing quantum processors by using reversible logic gates to analyse the performance of ALUs. Additionally, it shows that QCA might be used in quantum computers, assuming that the underlying technology can be made workable. When considering energy-efficient computations, reversible or information-lossless circuits are crucial for digital signal processing, communication, computer graphics, and cryptography. By preventing information loss, reversible logic is utilised to lessen the power dissipation that occurs in classical circuits, which is particularly promising because it allows for extremely low power computations like nano-computing for quantum processors. Because bits of information are lost during logic operations, typical digital circuits waste a lot of energy. It is well known that an Arithmetic and Logical Unit is one of the most fundamental operational units in the quantum processor (ALU). The design and implementation of an innovative r/q 16-bit ALU that improves the overall performance of quantum processors while carrying out the task in the digital signal processing domain are discussed in this study. When reversible gates were used in place of logic gates, the power dissipation in terms of information bit loss was significantly reduced. Simulation of these circuits is done by QCA Designer tool and language used for programming is very high-speed hardware integrated circuit hardware descriptive language, Verilog HDL. The power and delay analysis of the various sub modules is performed and a comparison with the traditional circuits is also carried out. The designed ALU has better efficiency as it has less power loses and reduction in power loss upto 39 % is obtained.
Image processing hardware should be able to perform repeated pixel-level operations with minimal overhead by designing compact arithmetic-logic circuitry. A compact reversible logic architecture offers a promising alternative to conventional architectures in image-processing applications due to its high throughput and energy efficiency. Additionally, reversible arithmetic circuits minimize resource utilization while preserving computational functionality, providing a scalable foundation for quantum-inspired computing platforms. The aim of this paper is to develop a low-quantum-cost reversible arithmetic-logic circuit that could serve as the basis of quantum-inspired image processing systems in the future. The proposed design incorporates only three gates, 16 selector-controlled outputs, four garbage outputs, and three constant inputs. The proposed design uses three composite reversible blocks. Its resource requirements are compared with earlier reversible ALU designs using the reported quantum costs, gate counts, garbage outputs, and constant inputs. The design does not propose a complete image processor, but rather a contribution at the circuit level.
Reversible logic provides a foundation for nextgeneration computing systems, particularly in quantum and emerging nanotechnology-based architectures. Unlike conventional logic, reversible gates preserve information and support backward computation, making them crucial for designing quantum circuits. This paper introduces a reversible Arithmetic and Logic Unit (ALU) that performs eight fundamental operations-AND, OR, NOT, XOR, addition, subtraction, increment, and decrement-using Fredkin, Peres, TR, and modified Fredkin gates. A dedicated control unit manages operation selection, ensuring functional flexibility and circuit efficiency. The proposed design achieves significant improvements by minimizing ancilla inputs, quantum cost and garbage outputs, resulting in a total quantum cost of 71 and contains 16 reversible gates and 14 garbage outputs. The architecture was modeled and verified using Xilinx Vivado HLS and ISE 14.7, and implemented on the Nexys A7 (Artix-7) FPGA platform. Comparative analysis demonstrates better efficiency than existing reversible ALU designs, establishing the proposed circuit as a strong candidate for quantum computing and other advanced computing paradigms.
Reversible computing has emerged as a promising solution for reducing energy dissipation in digital systems by addressing the fundamental limitations caused by information loss.Quaternary reversible logic, which uses multi-valued representations, provides higher information density, reduced interconnect complexity, and better scalability when compared to conventional binary logic.This work presents the design and implementation of a quaternary reversible Arithmetic Logic Unit (ALU) that integrates essential computational modules, including arithmetic units, logical units, memory units, decoders, and multiplexers.The proposed architecture supports efficient data routing and precise operation control through a scalable control unit and a selection-line-based design approach.The designed ALU demonstrates reduced quantum cost, fewer garbage outputs, and minimized constant inputs in comparison with existing reversible ALU designs, while remaining compatible with larger reversible and quantum computing architectures.Simulation results and comparative analysis validate the improved efficiency and low-power potential of the proposed system, making it suitable for next-generation computing applications.The complete design is implemented using Verilog HDL and synthesized and simulated using Xilinx Vivado Design Suite 2025.
Reversible logic has emerged as a promising paradigm in various domains, such as low power VLSI design, quantum cellular automata, and nanotechnology-based systems. The arithmetic logic unit (ALU) is one of the main components of any central processing unit. In this paper we propose two new reversible ALUs using elementary quantum gates, with more functions compared to the existing designs. The results show that the proposed designs are better than the existing counterparts in terms of cost-metrics and the number of functions generated. The proposed reversible ALUs can be used in the implementation of quantum computers. All the designs are with nanometric scales.