  Living cells are known to generate non-Gaussian active fluctuations
significantly larger than thermal fluctuations owing to various active
processes. Understanding the effect of these active fluctuations on various
physicochemical processes, such as the transport of molecular motors, is a
fundamental problem in nonequilibrium physics. Therefore, we experimentally and
numerically study an active Brownian ratchet comprising a colloidal particle in
an optically generated asymmetric periodic potential driven by non-Gaussian
noise having finite-amplitude active bursts, each arriving at random and
decaying exponentially. We find that the particle velocity is maximum for
relatively sparse bursts with finite correlation time and non-Gaussian
distribution. These occasional kicks, which produce Brownian yet non-Gaussian
diffusion, are more efficient for transport and diffusion enhancement of the
particle than the incessant kicks of active Ornstein-Uhlenbeck noise.
