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I wish they used a better title. Entanglement is not a kind of interaction, and I wonder what a "quantum theory experiment" is.

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It isn't just the title, the whole article is poorly written. It gives the impression that faster-than-light communication is possible.

From the first sentence:

"[Scientists] conducted an experiment they say proves one of the most fundamental claims of quantum theory — that objects separated by great distance can instantaneously affect each other’s behavior."

Emphasis mine. This is totally wrong.

The second sentence:

"The finding is another blow to one of the bedrock principles of standard physics known as “locality,” which states that an object is directly influenced only by its immediate surroundings."

Again, this is wrong. Quantum physics is entirely consistent with locality. It contradicts "local hidden variable models." Despite the similar name, this is different from locality. (Local hidden variable models are local, classical models.)

To add to that, Bell's theorem says that either locality or hidden variables may be true, but not both. We could construct a formulation of quantum mechanics that includes hidden variables, but must account for the state of the universe at arbitrarily distant locations.

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