Equation 5 · How Fast Can a Horizon Learn Which Path You Took?
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The horizon papers supply a curved-spacetime mechanism for changing . Danielson, Satishchandran, and Wald describe the conditional long-range fields as sourcing distinct coherent states of the radiation. Radiation reaching the horizon is a genuine independent degree of freedom rather than a merely constrained Coulomb field, so slow recombination cannot necessarily restore its overlap [ 1 ] . Their later causality argument has an instructive ancestor: if an interior observer could in principle distinguish the long-range fields of two exterior branches, consistency prevents that optional later measurement from deciding whether Alice’s already spacelike-separated interference survives.…
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The horizon papers supply a curved-spacetime mechanism for changing . Danielson, Satishchandran, and Wald describe the conditional long-range fields as sourcing distinct coherent states of the radiation. Radiation reaching the horizon is a genuine independent degree of freedom rather than a merely constrained Coulomb field, so slow recombination cannot necessarily restore its overlap [ 1 ] . Their later causality argument has an instructive ancestor: if an interior observer could in principle distinguish the long-range fields of two exterior branches, consistency prevents that optional later measurement from deciding whether Alice’s already spacelike-separated interference survives. Quantized radiation and vacuum fluctuations jointly remove the paradox [ 10 ] .
Sources cited in the surrounding passage
- [1] Black Holes Decohere Quantum Superpositions ↗
- [10] Quantum Superposition of Massive Objects and the Quantization of Gravity ↗
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