Probabilistic bits (p-bits) made dramatically more efficient by being fully digital, for artificial intelligence and machine learning

https://www.eurekalert.org/news-releases/1109250

"P-bits hardware elements naturally fluctuate between 0 & 1, so ideal for optimization/ inference, but rely on bulky, power-hungry, expensive digital-to-analog converters... overcome using magnetic tunnel junctions  naturally switching between 2 states randomly, a 50/50 bitstream fed into simple digital circuit that uses controlled timing combining signals, allowing smooth tuning probability of output being 0 or 1... requires significantly less area and power while being compatible with modern semiconductor manufacturing"