Entanglement gives rise to Pareto optimality in the generalised quantum   Hawk-Dove Game
  We quantise the generalised Hawk-Dove Game. By restricting the strategy space available to the players, we show that every game of this type can be extended into the quantum realm to produce a Pareto optimal evolutionarily stable strategy. This equilibrium replaces the inefficient classical one when the entanglement prepared in the game exceeds a critical threshold value, which we derive analytically. 
E. A. B. Lindsell, K. Wiesner
quant-ph