Linear quantum measurements with independent particles are bounded by the standard
quantum limit, which limits the precision achievable in estimating unknown phase …

State-of-the-art atomic clocks are based on the precise detection of the energy difference
between two atomic levels, which is measured in terms of the quantum phase accumulated …

The strong-coupling regime of cavity quantum electrodynamics (QED) represents the light–
matter interaction at the fully quantum level. Adding a single photon shifts the resonance …

Quantum scrambling describes the spreading of information into many degrees of freedom
in quantum systems, such that the information is no longer accessible locally but becomes …

The interaction between an atomic ensemble and a light mode in a high-finesse optical
cavity can easily reach the strong-coupling regime, where quantum effects dominate. In this …

Spin squeezing can improve atomic precision measurements beyond the standard quantum
limit (SQL), and unitary spin squeezing is essential for improving atomic clocks. We report …

The realization of a quantum network node of matter-based qubits compatible with
telecommunication-band operation and large-scale quantum information processing is an …

We experimentally demonstrate an optical bistability between two hyperfine ground states of
trapped, cold atoms, using a single mode of an optical resonator in the collective strong …

We report dispersive coupling of an optically trapped nanoparticle to the field of a Fabry–
Perot cavity in high vacuum. We demonstrate nanometer-level control in positioning the …

We show that the onset of steady-state superradiance in a bad cavity laser is preceded by a
dissipative phase transition between two distinct phases of steady-state subradiance. The …