  Over the decades, the spin dynamics of a large set of lanthanide complexes
have been explored. Lanthanide-based molecular nanomagnets are bistable spin
systems, generally conceptualized as classical bits, but many lanthanide
complexes have also been presented as candidate quantum bits (qubits). Here we
offer a third alternative and model them as probabilistic bits (p-bits), where
their stochastic behavior constitutes a computational resource instead of a
limitation. We present a modelling tool for molecular spin p-bits, we
demonstrate its capability to simulate bulk magnetic relaxation data and ac
experiments and to simulate a minimal p-bit network under realistic conditions.
Finally, we go back to a recent systematic data gathering and screen the best
lanthanide complexes for p-bit behavior, lay out the performance of the
different lanthanide ions and chemical families and offer some chemical design
considerations.
