title: Negative velocity fluctuations of pulled reaction fronts.
abstract: The position of a reaction front, propagating into an unstable state, fluctuates because of the shot noise. What is the probability that the fluctuating front moves considerably slower than its deterministic counterpart? Can the noise arrest the front motion for some time, or even make it move in the wrong direction? We present a WKB theory that assumes many particles in the front region and answers these questions for the microscopic model A⇄2A and random walk.
authors: Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, Israel.
authors: Baruch
authors: B
authors: Meerson
authors: Pavel V
authors: PV
authors: Sasorov