Towards thermodynamics of solitons: cooling

Recently it has been shown that pulse reshaping in a synchronously driven f ibre ring resonator can give rise to the formation of a soliton array which may exist either in a 'fluid' or 'solid' state, called a soliton gas and s oliton crystal, respectively. Here, we demonstrate in numerical simulations that a soliton gas can be cooled to a soliton crystal by a procedure analo gous to evaporative cooling.