Faculty's Laser Research Center invites you to an open lecture by guest lecturer prof. Georg von Freymann. This lecture will analyse quantum processes and raise questions about using laser technologies in quantum technologies.
When? 24 September 13:00
Where? 306 aud. at Laser Research Center (Saulėtekio av. 10)
"Photonic quantum simulation: Limits and switching of topological protection and the influence of higher orbitals in coupled waveguide systems"
Abstract (find references here):
Applications of quantum technology are highly sought-after and thus supported by public funding agencies. However, the meaning of application varies depending on who you talk to: In the physics community application often means a useful laboratory implementation, while from an industrial perspective, application means solving a measurement problem in production or even creating a saleable product.
To address the physics perspective, I will discuss 3D µ-printed photonic quantum simulators based on coupled waveguide system, focusing on topological protection and Floquet (time-periodic) driving. Such experimental model systems allow for studying these phenomena under very well controlled conditions. Examples are periodic driving of topologically protected edge modes in the one-dimensional Su-Schrieffer-Heeger-chain leading to depopulation of the edge mode despite topological protection [1], periodic driving of two-dimensional honey-comb-lattices establishes topological protection in an otherwise topologically trivial model system [2], switching of topological protection via excitation with and without orbital angular momentum of light [3], and establishing higher-order topological insulators using p-orbitals of the waveguides [4].
From the industry perspective I will discuss recent results for a orbital-angular-momentum mode multiplexer/demultiplexer [5].
