Squeezing of Atomic Quantum Projection Noise

Abstract

We provide a framework for understanding recent experiments on squeezing of a collective atomic pseudo-spin, induced by a homodyne measurement on off-resonant probe light interrogating the atoms. The detection of light decimates the atomic state distribution and we discuss the conditions under which the resulting reduced quantum fluctuations are metrologically relevant. In particular, we consider a dual probe scheme which benefits from a cancelation of classical common mode noise sources such that quantum fluctuations from light and atoms are the main contributions to the detected signal.

Submitted to Journal of Modern Optics

References in corpus (4)

• Spin squeezing of atomic ensembles via nuclear-electronic spin entanglement
• Spin squeezing of a cold atomic ensemble with the nuclear spin of one-half
• Spin squeezing of atomic ensembles by multi-colour quantum non-demolition measurements
• Backaction noise produced via cavity-aided nondemolition measurement of an atomic clock state

Cited by in corpus (4)

• Quantum spin squeezing
• Squeezed-Light Optical Magnetometry
• Entanglement-assisted atomic clock beyond the projection noise limit
• Dispersive detection of atomic ensembles in the presence of strong lensing