Phase transition and symmetry breaking in the minority game.
We show that the minority game, a model of interacting heterogeneous agents, can be described as a spin system and displays a phase transition between a symmetric phase and a symmetry broken phase where the game's outcome is predictable. As a result a "spontaneous magnetization" arises in the spin formalism.
Challet
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Institut de Physique Théorique, Université de Fribourg, CH-1700 Fribourg, Switzerland.
Marsili
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