An Approach to Designing Complex Reversible Logic Gates.

Vilaskumar patil Vilaskumar patil, Veeresh k Veeresh k

At present days , reversible logic circuits have many applications in the field of optical information processing, digital signal processing , nano technology and quantum computing . Reversible logic plays an important role when computations with minimum energy dissipation are considered. The purpose of designing reversible logic is to decrease the number of area, power, garbage outputs , constant inputs, quantum cost, reversible gates, delay and hardware complexity . This paper reveals a review on some reversible logic gates, which is useful in designing more complex systems having reversible circuits and can do execution of more complex operations using quantum computers. In upcoming days digital technology will be using reversible logic gates in order to reduce the propagation delay and power consumption as it provides negligible loss of information in the circuit. Keywords: Reversible Gate, Garbage output, quantum cost, Reversible logic, Power dissipation

Priyanka Priyanka, K M Rajesh

Dilip P. Vasudevan, Parag K. Lala

M.Bhanusri, Dr.Ch.Santhi Rani, A Latha +1 more

Reversible logic is introduced to overcome the problem of heat dissipation in conventional systems i.e using AND and OR gates.Quantum computing is one of the major and emerging applications of reversible logic.In conventional computers there are two states either ‘1’ or ‘0’ but quantum computing which is devolping based on the quantum theory where ‘0’ and ‘1’are used simultaneously . Reversible logic gates are designed using reversible logic.Reversible logic gates are the gates that have same number of inputs and outputs and have one-to-one mapping between input and output lines.Based on this reversible logic we have designed a reversible division circuit since division is one of the main building block in ALU and has crucial role in digital signal processing.The proposed design have reduced the hardware complexity of 24s+48δ when compared to the existing designs in reversible logic.

Mamtha Prajapati, Kalyan Babu Killana

Reversible logic computation and optimization of reversible circuits help synthesize applications characterized by ultra‐low power consumption, including quantum information processing, the field of nanotechnology, semiconductor technology, the field of optics, and very‐large‐scale integration (VLSI), among others. Reversible logic design is a growing research subject that evaluates and applies resources in new advancements. This article provides an optimized, unique, resource‐constrained universal quantum reversible gate for nanoscale applications that perform all fundamental logic operations. Optimization and gate relocation have enhanced a published and proposed design. Quantum reversible circuits are optimized for cost and depth via template matching, gate fusion (merging) and commutation, gate decomposition, and gate elimination. These methods reduce circuit complexity and size significantly. A step‐by‐step optimization of the quantum reversible logic design is first presented. The novel quantum reversible gates MRQ1, MRQ2, and M‐BUS are implemented and verified on the IBM Qiskit platform. The proposed reversible gates’ design complexity is assessed using 13 standard Boolean expressions. Proposed quantum reversible gates demonstrate an improvement in performance, covering a range of 12.5%–72.7% over prior designs in gate count, depth, and quantum cost. Gate count improved most, impacting other parameters and demonstrating the design’s resource efficiency.