Estimating the concentration of chiral media with bright squeezed light

The concentration of a chiral solution is key parameter in many scientific fields and industrial processes. This can be estimated to high precision by exploiting circular birefringence or dichroism present optically active media. Using the quantum Fisher information formalism, we quantify performance Gaussian probes estimating analytes. We find that bright-polarization squeezed state provide advantage over equally bright classical strategies scales exponentially with squeezing factor for circularly birefringent sample. Four-fold enhancement achievable using state-of-the-art levels intensity measurements.