 In the quantum version of the game, the bit is replaced by the qubit, which is a quantum superposition of two or more base states.In the case of a two-strategy game this can be physically implemented by the use of an entity like the electron which has a superposed spin state, with the base states being +1/2 (plus half) and −1/2 (minus half).Each of the spin states can be used to represent each of the two strategies available to the players.