Abstract

Continuous-variable quantum computation and communication is a promising alternative to qubits-based quantum information [1]. Many breakthrough experiments, such as cryptography, entanglement distillation or teleportation, have been performed using a single-mode of the field. In this context, several modes of the electromagnetic field can be considered as different channels or different variables and could be used to perform multiplexed protocols. Therefore, the production and characterization of multimode non-classical states is getting more and more attention in different regimes. One of them is dealing with copropagating transverse modes created by optical parametric oscillators (OPOs). This regime could be particularly fruitful since many imaging techniques can be use to deal with transverse modes and perform operations such as separating and combining them, or simply creating a transverse mode with an arbitrary transverse profile from any input mode, with techniques that would preserve non-classical light [2].

© 2011 IEEE