Temitayo Adeyeye

, , Daniel Lathrop, , , , , , Philippe Talatchian, Ursula Ebels, Though exponential distributions are ubiquitous in statistical physics and related computational models, sampling them from device behavior is rarely done. The superparamagnetic tunnel junction (SMTJ), a key device in probabilistic computing, shows exponentially distributed temporal switching dynamics.

Superparamagnetic tunnel junctions are important devices for a range of emerging technologies, but most existing compact models capture only their mean switching rates. Capturing qualitatively accurate analog dynamics of these devices will be important as the technology scales up.

Superparamagnetic tunnel junctions (SMTJs) are promising sources of randomness for compact and energy-efficient implementations of probabilistic computing techniques. Augmenting an SMTJ with electronic circuits, to convert the random telegraph fluctuations of its resistance state to stochastic digital signals, gives a basic building block known as a probabilistic bit or p-bit.