Generation of High-Order Vortex States from Two-Mode Squeezed States

GRACIANA PUENTES; ANINDYA BANERJI

Non-Linear Optics with Structured Light

FRONTIERS MEDIA

Año: 2021; p. 4 - 11

We report a scheme for generation of high-order quadrature vortex states using two-modephoton-number squeezed states, generated via the non-linear process of SpontaneousParametric Down Conversion. By applying a parametric rotation in the quadratures,using a ϕ converter, the Gaussian profile of the photon-number squeezed input state canbe mapped into a superposition of Laguerre-Gauss modes in the quadratures with Nvortices or singularities, for an input state containing 2N photons, thus mapping photonnumberfluctuations to interference effects in the quadratures. Our scheme has thepotential to improve measurement sensitivity beyond the Standard Quantum Limit (SQL), by exploiting the advantages of optical vortices, such as high dimensionality ortopological properties, for applications requiring reduced uncertainty, such as quantumcryptography, quantum metrology and sensing.