VU FF Lazerinių tyrimų centras kviečia į atvirą kviestinio lektoriaus prof. Georg von Freymann paskaitą. Joje bus analizuojami kvantiniai procesai bei keliami klausimai apie lazerinių technologijų taikymo galimybes kvantinėse.
Kada? Rugsėjo 24 13:00
Kur? 306 aud. Lazerinių tyrimų centre, Saulėtekio al. 10
"Photonic quantum simulation: Limits and switching of topological protection and the influence of higher orbitals in coupled waveguide systems"
Apie paskaitą (šaltinius rasite čia):
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].
