Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series LPENS-MDQ
Subjects cond-mat
Date Monday 11 October 2021
Time 13:30
Institute LPENS
Seminar Room Salle Djebar - 29 rue d'Ulm
Speaker's Last Name Lanco
Speaker's First Name Loïc
Speaker's Email Address
Speaker's Institution Centre de Nanosciences et de Nanotechnologies, C2N
Title Controlling the interaction between (single) spins and (single) photons
Abstract The quest for efficient spin-photon interfaces is at the core of many proposals in quantum optics. On the one hand, it would allow developping deterministic spin-photon and photon-photon gates for quantum computing, as well as multi-photon « cluster states » for quantum communications. On the other hand, it would allow implementing interesting fundamental studies on quantum measurement, whereby each photon can be used as a « meter » of the spin system. In this seminar, I will briefly review some systems used for spin-photon coupling, and then focus on the recent progress made in C2N, using charged quantum dots in pillar-based cavities. I will show how a confined electron spin can reverse the polarization state of reflected photons in the Poincaré sphere, and how single detected photons can be used for the Quantum Non-Demolition Measurement of a single spin. I will discuss how the spin dynamics can be influenced by a number of solid-state fluctuations, including the hyperfine interaction between the confined carriers and their nuclear spin environment. Finally, I will discuss some perspectives of our work, for the realization of optimized spin-photon interfaces and their use in various applications.
arXiv Preprint Number

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