Quantum teleportation between light of different colors

• Grant number: 13/00958-0
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Effective date (Start): July 01, 2013
• Effective date (End): June 30, 2014
• Field of knowledge: Physical Sciences and Mathematics - Physics
• Principal Investigator: Marcelo Martinelli
• Grantee: Felippe Alexandre Silva Barbosa
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 10/08448-2 - Quantum information with continuous variables of atoms and light, AP.TEM

Abstract

With the recent successful results obtained using optical parametric oscillators (OPOs) to generate intense entangledlight fields, we propose to use this entanglement in quantum communication protocols with continuous-variablesystems. At first, we will use two strongly correlated beams to teleport a coherent state between differentwavelengths of the electromagnetic spectrum. In order to do so, we will use the tuning properties of the OPO togenerate bright signal and idler beams, entangled and non-degenerate.Following this experiment, we will swap entanglement between light fields of different colors using two OPOs. Such demonstrations will serve as a basis for new teleportation protocols, a very important intermediate step in the implementation of quantum networks, connecting nodes that operate in different frequency bands.