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VERY LONG BASELINE INTERFEROMETRY

Clock comparison using black holes

Observing accreting black holes in the early Universe allows precise comparison of clocks over intercontinental distances on Earth. This is achieved with a novel observation strategy using the next generation of very long baseline interferometry systems.

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Fig. 1: Schematic outline of future intercontinental clock comparisons.

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Correspondence to Rüdiger Haas.

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Haas, R. Clock comparison using black holes. Nat. Phys. 17, 164–165 (2021). https://doi.org/10.1038/s41567-020-01071-5

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