Plenary Presentations from the Physics and Engineering Issues in Adiabatic/Reversible Classical Computing Visioning Workshop
Below you can find selected pre-recorded plenary presentations from the CCC’s visioning workshop on Physics & Engineering Issues in Adiabatic/Reversible Classical Computing. Videos are sorted by the day they were shown, which corresponds to the topic area which they fall under: physics, technology, and architecture or high-level (tools / algorithms / systems / apps.). The workshop was held virtually October 5th – 9th, 2020 to address the physics & engineering challenges in adiabatic/ reversible classical computing. Read more about the workshop’s motivation below or jump to videos:
- October 5th – Introduction
- October 5th – Physics
- October 6th – Technology
- October 7th – Architecture and High-Level
It has become widely recognized that today’s approach to general digital computation, which is based on standard combinational and sequential digital architectures constructed out of standard (irreversible) Boolean logic elements implemented using CMOS (complementary metal/oxide/semiconductor) transistor technology, is approaching fundamental physical limits to further improvements on its energy efficiency and power-limited performance. The final (2015) edition of the International Technology Roadmap for Semiconductors (ITRS), as well as recent editions of its successor roadmap, the International Roadmap for Devices and Systems (IRDS), suggest that a practical limit will be reached by around the year 2030. By the end of the CMOS roadmap, logic signal energies at the gate of a minimum-sized transistor simply cannot decrease much further without running afoul of fundamental limits on efficiency and stability arising from thermal fluctuations. Even moving to “Beyond CMOS” switching devices cannot improve this situation very much, since the same fundamental thermodynamic limits still apply.
Thus, there is an increasing need to explore new fundamental paradigms for the engineering implementation of general computing systems (at all scales from tiny embedded devices to large-scale supercomputers and data centers) in search of novel concepts for computation that can transcend the above limits that are inherent to the traditional irreversible digital paradigm. The space of ideas that have been considered include a variety of concepts for “physical” computing (computing that leverages fundamental physics to do computing in a more direct way than in the traditional digital paradigm), including various analog and stochastic computing concepts, as well as quantum computing (for problems amenable to quantum speedups).
This workshop gathered the research community in this field, laid a common foundation of existing state-of-the-art knowledge, and the participants are currently drafting a comprehensive workshop report that can make the case for a major new initiative effectively to federal-level decision-makers.
Learn more about the workshop on the workshop webpage.