Randomnes makes some computations simpler, now it can be done in a single MRAM-like device. IEEE spectrum interviewed Prof. Wang and Yang on their device, find the interview here.
At the 2017 IEEE International Electron Devices Meeting in San Francisco, Yang Lv and Prof. Jian-Ping Wang reported their device, similar to an MRAM memory cell, can perform the stochastic computing versions of both addition and multiplication on four logical inputs. They have made a big leap in a strange but growing field of computing, called stochastic computing. The method uses random bits to calculate via simpler circuits, at lower power, and with greater tolerance for errors. Though it was first conceived in the 1960s, one of the things holding stochastic computing back was the lack of suitable devices to make it practical.