Supersymmetry and fluctuation relations for currents in closed networks
  We demonstrate supersymmetry in the counting statistics of stochastic particle currents and use it to derive exact nonperturbative relations for the statistics of currents induced by arbitrarily fast time-dependent protocols. 
Nikolai A. Sinitsyn, Alexei Akimov, and Vladimir Y. Chernyak
cond-mat.stat-mech hep-th math-ph math.MP