The exciting result is that there’s some advantage to quantum communication, regardless of how small it is.” “But if you imagine the players are extremely rich, and the deck is really low in number, so that every card counts, these small advantages can be big. “It’s pretty small in terms of the actual magnitude of the expected quantum advantage,” says first author Joseph Lin, a former graduate student at MIT. They found that such quantum communication would give the players a slight advantage compared to classical card-counting strategies, though in limited situations where the number of cards left in the dealer’s deck is low. In their study, the authors nevertheless explore the theoretical possibilities for how a quantum system might influence outcomes in blackjack.

Such systems exist now in the laboratory, although not in forms convenient for any practical use in casinos.

In a paper published this week in the journal Physical Review A, the researchers lay out a theoretical scenario in which two players, playing cooperatively against the dealer, can better coordinate their strategies using a quantumly entangled pair of systems. Can a quantum strategy help bring down the house? MIT study finds quantum entanglement gives slight advantage in playing against the house.

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