The authors experimentally demonstrate time-delocalized local measurements inside a photonic quantum switch that preserve indefinite causal order, achieving a causal witness value of C_W ≈ -0.305(1).
Three-Slit Interference: A Duality Relation,
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A review tracing the history of complementarity from Bohr's ideas to its quantification, links with uncertainty and contextuality, and applications in quantum theory.
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Time-Delocalized Local Measurements in an Indefinite Causal Order
The authors experimentally demonstrate time-delocalized local measurements inside a photonic quantum switch that preserve indefinite causal order, achieving a causal witness value of C_W ≈ -0.305(1).
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Bohr's complementarity
A review tracing the history of complementarity from Bohr's ideas to its quantification, links with uncertainty and contextuality, and applications in quantum theory.