Optical Clocks
Proper-time comparison, gravitational redshift, network transients, and variation of fundamental constants.
A physical theory of temporal architecture must state what an instrument would record differently, how the effect scales, when it disappears, and what result would falsify it.

Proper-time comparison, gravitational redshift, network transients, and variation of fundamental constants.
Quantum phase, acceleration, gravity gradients, and clock-path relationships.
Quantum switches and causal witnesses under carefully stated assumptions.
Propagation, gravitational waves, black-hole geometry, early-universe signatures, and cosmic topology.
The default ladder is error, calibration, environment, statistics, incomplete conventional model, unknown conventional phenomenon, new physics, and only then new temporal physics.