Physics Seminar
The CHSH game helps reveal connections between how physical systems are assumed to encode information and constraints on possible statistical correlations. Bell's theorem tells us that players can expect to win a maximum of 75% of the time, under some reasonable-seeming assumptions about locality. Quantum entanglement opens up new strategies that allow players to win about 85% of the time, a value known as Tsirelson's bound. But why are quantum theory’s apparent violations of locality limited? Why aren’t players able to win 100% of the time? By reformulating the CHSH game as a stochastic process, we provide a more physically transparent account of Tsirelson’s bound, showing that it follows from the existence of indivisible evolution and a new, more precise notion of causal locality.
Speaker: Dr. David Kagan
SENG 201