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Heralded single photon states preparation

Grant number: 20/10495-0
Support type:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): September 01, 2020
Effective date (End): May 31, 2023
Field of knowledge:Physical Sciences and Mathematics - Physics - General Physics
Principal Investigator:Felippe Alexandre Silva Barbosa
Grantee:Gregory Alexandre Ferreira
Home Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:18/03474-7 - Nonclassical states of light on chip, AP.JP

Abstract

We will use integrated optical resonators made with lithium niobate (LiNbO3) and silicon nitride (Si3N4) to prepare heralded single photon states. The non-linearity of the materials allows for the creation of correlated photon pairs due toto the process of Parametric Downward Conversion (PDC) or mixture of four waves (4WM). When the material is placed inside an optical cavity, the feedback provided by the resonator enhances this process. When one of the photons of these correlated pairs correlated is detected by a single photon detector, the state of the other photon collapses to a single photon state. These states will be characterized by using Superconducting Single Photon Detectors (SSPD) and homodyne detection. (AU)