Optical atomic clocks require local oscillators with exceptional optical coherence owing to
the challenge of performing spectroscopy on their ultranarrow-linewidth clock transitions …

The preparation of large, low-entropy, highly coherent ensembles of identical quantum
systems is fundamental for many studies in quantum metrology, simulation and information …

Rapid progress in optical atomic clock performance has advanced the frontiers of
timekeeping, metrology and quantum science,–. Despite considerable efforts, the …

Coherent control of high–quality factor optical transitions in atoms has revolutionized
precision frequency metrology. Leading optical atomic clocks rely on the interrogation of …

Currently, the most accurate and stable clocks use optical interrogation of either a single ion
or an ensemble of neutral atoms confined in an optical lattice. Here, we demonstrate a new …

Many-body quantum systems can exhibit a striking degree of symmetry unparallelled in their
classical counterparts. In real materials SU (N) symmetry is an idealization, but this …

We demonstrate the direct quantum nondemolition detection of a millihertz linewidth optical
atomic transition. We observe the modification of the phase and amplitude of a probe field …

Collective couplings of atomic dipoles to a shared electromagnetic environment produce a
wide range of many-body phenomena. We report on the direct observation of resonant …

We implement coherent delocalization as a tool for improving the two primary metrics of
atomic clock performance: systematic uncertainty and instability. By decreasing atomic …

We theoretically study the dynamics of n-level spin-orbit coupled alkaline-earth fermionic
atoms with SU (n) symmetric interactions. We consider three-dimensional lattices with …