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DOE OSTI · 1671000

Asynchronous Ballistic Reversible Computing using Superconducting elements

Lewis, Rupert M.·Frank, Michael P.·Henry, Michael David·Missert, Nancy A.
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Abstract

Computing uses energy. At the bare minimum, erasing information in a computer increases the entropy. Landauer has calculated %7E k B T log(2) Joules is dissipated per bit of energy erased. While the success of Moores law has allowed increasing computing power and efficiency for many years, these improvements are coming to an end. This project asks if there is a way to continue those gains by circumventing Landauer through reversible computing. We explore a new reversible computing paradigm, asynchronous ballistic reversible computing or ABRC. The ballistic nature of data in ABRC matches well with superconductivity which provides a low-loss environment and a quantized bit encoding the fluxon. We discuss both these and our development of a superconducting fabrication process at Sandia. We describe a fully reversible 1-bit memory cell based on fluxon dynamics. Building on this model, we propose several other gates which may also offer reversible operation.

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97 MATHEMATICS AND COMPUTING

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Lewis, Rupert M., Frank, Michael P., Henry, Michael David, Missert, Nancy A.. 2020-09-01. Asynchronous Ballistic Reversible Computing using Superconducting elements. https://doi.org/10.2172/1671000

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