Quantum Optics: Squeezed States and Quadrature Representation

This lecture covers the concept of squeezed states in quantum optics, presenting the mathematical expressions for squeezed states and their relation to two-photon coherent states. It also discusses the quadrature representation in optical systems, including the measurement using homodyne detection and the fluctuations of quadrature X. The lecture delves into the P-function, its properties, and its application in computing the expectations of normally ordered functions. Additionally, it explores the Wigner function and its role in defining the state in phase space, along with its experimental measurement via quadrature histograms.