  Quantum computers that process information by harnessing the remarkable power
of quantum mechanics are increasingly being put to practical use. In the
future, their impact will be felt in numerous fields, including in online
casino games. This is one of the reasons why quantum gambling theory has
garnered considerable attention. Studies have shown that the quantum gambling
theory often yields nontrivial consequences that classical theory cannot
interpret. We devised a quantum circuit reproducing classical blackjack and
found possible quantum entanglement between strategies. This circuit can be
realized in the near future when quantum computers are commonplace.
Furthermore, we showed that the player's expectation increases compared to the
classical game using quantum basic strategy, which is a quantum version of the
popular basic strategy of blackjack.
