  A novel transport phenomenon is identified that is induced by inertial
Brownian particles which move in simple one-dimensional, symmetric periodic
potentials under the influence of both a time periodic and a constant, biasing
driving force. Within tailored parameter regimes, thermal equilibrium
fluctuations induce the phenomenon of absolute negative mobility (ANM), which
means that the particle noisily moves {\it backwards} against a small constant
bias. When no thermal fluctuations act, the transport vanishes identically in
these tailored regimes. There also exist parameter regimes, where ANM can occur
in absence of fluctuations on grounds which are rooted solely in the complex,
inertial deterministic dynamics. The experimental verification of this new
transport scheme is elucidated for the archetype symmetric physical system: a
convenient setup consisting of a resistively and capacitively shunted Josephson
junction device.
