Thompson's group uses cavity QED to generate spin-squeezed and entangled atomic ensembles and continuous superradiant lasers, targeting atomic clocks and quantum sensors that beat the standard quantum limit and exploring quantum-enhanced metrology and analog gravity connections. For context, this complements the established paradigm of NV-diamond ensemble magnetometry (Hahn-echo/DEER, nanoscale NMR, T1 relaxometry) operating near pT/√Hz sensitivity.