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Charged Quantum Dot based Spin-Photon Interfaces

Grant number: 19/05888-6
Support type:Scholarships abroad - Research
Effective date (Start): August 12, 2019
Effective date (End): February 26, 2020
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal researcher:Marcio Daldin Teodoro
Grantee:Marcio Daldin Teodoro
Host: Loic Lanco
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Research place: Université Paris Diderot - Paris 7, France  

Abstract

This project aims at developing efficient spin-photon interfaces for short-term to long-term quantum applications. To engineer a controlled interaction between a stationary spin qubit and optical photons, we will use semiconductor quantum dot-cavity systems with a unique geometry based on micropillar cavities, deterministically coupled to InAs quantum dots, to exploit the giant polarization rotation induced by a single spin. Specifically, this project will be dedicated to the following research: (1) experiments on quantum foundations, using the spin-photon interaction to control the measurement process in various regimes (from spin-noise measurements to the study of photon-induced decoherence, from free coherent evolution to the quantum Zeno effect). (2) Demonstrating spin-photon entanglement, with the long-term goal of entangling several photons for quantum communication network applications. An additional impact is expected in the development of high-brightness single photon sources, an application which has recently reached the market.