1. A device, comprising: a nonlinear, biomimetic sensor with dynamics configured to sense occurrence of a temporal event with an accuracy that mimics neuron sensing, wherein the dynamics of the sensor are characterized by one or more coupled differential equations for evolution of a state variable, and the sensor requires a state variable to cross an energy barrier or threshold, and wherein there is negative correlation between successive crossing intervals; wherein the sensor is a magnetometer having nonlinear ferromagnetic core dynamics configured to mimic the threshold-crossing dynamics of an integrate-fire model neuron with negatively correlated inter-spike intervals by associating increasing magnetization with an increasing cell membrane voltage and associating decreasing magnetization with a reset in the cell membrane voltage; and an output configured to provide an output signal corresponding to the sensed event.