What question did this study set out to answer?

The aim is to classify interferometric observables across gravitational wave, radio, and optical domains.

March 10, 20260 citationsOpen Access

Interferometric Coherence Across Scales: Phase and Temporal Signatures in Gravitational Wave, Radio, and Optical Interferometry

Key Points

The aim is to classify interferometric observables across gravitational wave, radio, and optical domains.
Classified observables from gravitational wave, radio, and optical interferometry
Separated physical coherence from instrumental coherence
Identified existing diagnostics and mapped them to proxy observables
Coherence is categorized into physical and instrumental types
Existing observables are linked to specific metrics
No new experiments or predictions derived in this classification framework.

Abstract

We classify interferometric observables from three domains — gravitational wave (LIGO/Virgo/KAGRA), very long baseline radio (EHT/ALMA/VLBA), and optical/infrared (VLTI/GRAVITY) — within the taxonomic framework of Paper XXII. For each domain we explicitly separate physical coherence (Classes I–III) from instrumental coherence, identify existing diagnostics already routinely measured, and map them to specific proxy observables. This paper is classificatory; it does not derive RCD predictions for interferometric data nor propose new experiments.

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