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پانزدهمین کنفرانس بین المللی فناوری اطلاعات و دانش
A High-Speed Quantum Reversible Controlled Adder/Subtractor Circuit
Authors :
Negin Mashayekhi
1
Mohammad Reza Reshadinezhad
2
Shekoofeh Moghimi
3
1- University of Isfahan
2- University of Isfahan
3- University of Isfahan
Keywords :
Reversible Quantum Controlled Full Adder/Subtractor،Quantum Computing،Quantum Delay،Quantum Cost،Quantum Adder/Subtractor
Abstract :
Reversible logic is becoming increasingly important with the rise of technologies like quantum computing, as it retains information during computation and maintains a direct match between each input and its corresponding output. Quantum circuits are inherently reversible and the best computational model in quantum computing systems. Quantum computers require quantum processors. A critical component of any computer's processor is the arithmetic component, that handles binary operations like addition, subtraction, multiplication, and division. Notably, multiplication can be accomplished by repeatedly adding, while division can be carried out by repeatedly subtracting. This paper proposes a new design of quantum-controlled adder/subtractor (QCAS) with efficient quantum criteria like delay, quantum cost, number of ancilla and of garbage outputs. We propose a quantum reversible controlled full adder/subtractor block which is applied to construct an n-bit quantum adder/subtractor circuit. The proposed circuit is simulated using the Quirk online tool and the result confirms the accuracy of the design. This design achieves 28.5% and 61.3% improvement in delay and garbage outputs, and 14% and 41.2% increase in quantum cost and constant input, compared to its counterpart, respectively.
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