Time and Space, Volume 2, Issue 4

We show how the pre-geometric MacDowell–Monsouri gravity inevitably leads to an irreversible quantum cascade mechanism for the vacuum energy density. Such a process is a consequence of the spontaneous symmetry breaking (SSB) $SO(1,4)\to SO(1,3$...

The separated filter cell rubidium (Rb) atomic clock finds application in much of modern technology’s infrastructure due to its small size, weight and power (SWaP), its reliability and longevity, and its ability to achieve high levels of freque...

Accurate characterization and compensation of Earth–Moon reference-clock differences are important for cislunar positioning, navigation, and timing (PNT) architectures. This study develops an integrated analytical framework that connects modele...