Correlation measurement of squeezed light

Correlation measurement of squeezed light

Improved measurement of multimode squeezed light via an eigenmode approach

We analyze the output of a degenerate optical parametric amplifier using a different approach to understanding and characterizing multimode squeezed light. This approach is based on the concept of eigenmodes of the squeezing and predicts the mode structure of the local oscillator that should be used in order to measure the smallest quadrature noise. Although the importance of mode matching is w...

Squeezed Sates of Light

Over the past centuries, the physics community has seen much disagreement about the true nature of light. One camp of physicists, pointing to interference experiments, insisted on a wave nature; the other, citing experiments involving the interaction between light and matter, believed in a particle nature. Today, we know that both parties were right; light is an entity that exhibits both partic...

Squeezed light from spin-squeezed atoms.

We propose to transfer quantum correlations from atoms to light by Raman scattering of a strong laser pulse on a spin-squeezed atomic sample. We prove that the emission is restricted to a single field mode which perfectly inherits the quantum correlations of the atomic system.

Squeezed-light optical magnetometry.

We demonstrate a light-shot-noise-limited magnetometer based on the Faraday effect in a hot unpolarized ensemble of rubidium atoms. By using off-resonant, polarization-squeezed probe light, we improve the sensitivity of the magnetometer by 3.2 dB. The technique could improve the sensitivity of the most advanced magnetometers and quantum nondemolition measurements of atomic spin ensembles.