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Direction of communication via quantum particles can be set after entanglement (by deciding who sends known sequences): https://www.sciencenews.org/article/two-way-communication-possible-single-quantum-particle — in zero delay communication there is no meaning to direction
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… or not: this is actually a simpler experiment where the photon travels there and back. See https://news.ycombinator.com/item?id=16447541
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