Qubit flip game on a Heisenberg spin chain
  We study a quantum version of a penny flip game played using control parameters of the Hamiltonian in the Heisenberg model. Moreover, we extend this game by introducing auxiliary spins which can be used to alter the behaviour of the system. We show that a player aware of the complex structure of the system used to implement the game can use this knowledge to gain higher mean payoff. 
Jaros{\l}aw A. Miszczak, Piotr Gawron, Zbigniew Pucha{\l}a
quant-ph