Physics for beginners/17-quantum interpretations

Bell's theorem and quantum entanglement
The system described above involves one particle that can be in one of two different places. To model the paradoxical behavior associated with Bell's theorem we require a bit more complexity. First, we need wave that not only can be in two different places, it needs to wave in two different directions.

Shown to the right is one of two degenerate standing waves that can occur if the wave is confined to lie within a circle. Both waves are commonly called 2p states. The other 2p state is oriented perpendicular to the one shown in the figure.

We also need two different particles, depicted here as coffee and tea, located in two cups that can moved apart so that they are separated by vast distances. By tradition, the two cups in a Bell's theorem experiment are called Alice and Bob. And given the analogy to sloshing liquids, it is not unreasonable to call the two particles Coffee and Tea. We don't know which beverage is in which cup. But we do know that if one is in Alice, the other is in Bob. And we know something about how the beverages are sloshing. For example, if one is sloshing in the clockwise direction, the other is counterclockwise.

For more details on this analogy, visit WikiJournal_of_Science/A_card_game_for_Bell%27s_theorem_and_its_loopholes/Tube_entanglement.

For a collection of quizzes on this subject visit Quizbank/Bell.

All pages associated with this WikiJoural article are listed at Special:PrefixIndex/WikiJournal_of_Science/A_card_game_for_Bell%27s_theorem_and_its_loopholes

-