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arXiv · 2206.14241

Quantum dynamics for energetic advantage in a charge-based classical full-adder

João P. Moutinho·Marco Pezzutto·Sagar Pratapsi·Francisco Ferreira da Silva·Silvano De Franceschi·Sougato Bose·António T. Costa·Yasser Omar
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Abstract

We present a proposal for a one-bit full-adder to process classical information based on the quantum reversible dynamics of a triple quantum dot system. The device works via the repeated execution of a Fredkin gate implemented through the dynamics of a single time-independent Hamiltonian. Our proposal uses realistic parameter values and could be implemented on currently available quantum dot architectures. We compare the estimated energy requirements for operating our full-adder with those of well-known fully classical devices, and argue that our proposal may provide a consistently better energy efficiency. Our work serves as a proof of principle for the development of energy-efficient information technologies operating through coherent quantum dynamics.

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João P. Moutinho, Marco Pezzutto, Sagar Pratapsi, Francisco Ferreira da Silva, Silvano De Franceschi, Sougato Bose, António T. Costa, Yasser Omar. 2022-06-28. Quantum dynamics for energetic advantage in a charge-based classical full-adder. https://doi.org/10.1103/prxenergy.2.033002

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