You are warmly invited to attend seminar #5 of the QST Seminar Series 2022/2023 in Naples.

Speaker: Dr. Bereneice Sephton  (University of Naples Federico II)

Title: "Towards teleporting quantum images"

Time/Location: Tue. Jan. 24, 2023 at 11:30 in Aula 0M01 - Department of Physics - Federico II

Online: Online participation via MS Teams: link IMPORTANT: In case your access is denied, log out from your institutional account and open MS Teams in your web browser.

Abstract

Quantum teleportation allows the disembodied transferral of information between two destinations. A general teleportation approach exploits entanglement between two photons to convey information between two destinations without the information physically existing in the path between them. Indirect (Bell) measurements, between one of the entangled photons and a state one desires to transmit, then allows the disembodied information to be conveyed elsewhere, moderated by classical communication. Physically developing such a protocol is of interest across a variety of quantum information tasks as it forms a salient toolbox from quantum computing to security and quantum networks, sparking much research into the practical implementation thereof. This has been demonstrated with a variety of approaches ranging from NMR to solid state systems, but the highest dimension teleported is limited to three and requires an extra (ancillary) photon pair for every dimensional increase. A trade-off for higher dimensions has been setups that are difficult to scale and resource intensive if further dimensions are desired. 

In an effort towards practically feasible teleportation of systems such as images, multi-level atoms or molecules, we consider side-stepping the scalability issue with and explore a non-linear approach in place of the traditional linear implementation for the entangling Bell step. With this, we experimentally show high-dimensional teleportation exceeding 10 dimensions for twisted light as well as other spatial states with fidelities beyond the classical limit. The results open the way towards implementing teleportation in a practically useful way with an encouraging paradigm allowing versatile and high-capacity optical quantum communication protocols for on-demand states. 

QST Seminars are organized by Procolo Lucignano, Domenico Montemurro, Davide Massarotti, Vincenzo D'Ambrosio, Filippo Cardano and Martina Esposito. https://www.qst.unina.it