| Autor: |
Olekhno NA; Department of Physics and Engineering, ITMO University, Saint Petersburg, 197101, Russia., Kretov EI; Department of Physics and Engineering, ITMO University, Saint Petersburg, 197101, Russia., Stepanenko AA; Department of Physics and Engineering, ITMO University, Saint Petersburg, 197101, Russia., Ivanova PA; Department of Physics and Engineering, ITMO University, Saint Petersburg, 197101, Russia., Yaroshenko VV; Department of Physics and Engineering, ITMO University, Saint Petersburg, 197101, Russia., Puhtina EM; Department of Physics and Engineering, ITMO University, Saint Petersburg, 197101, Russia., Filonov DS; Center for Photonics and 2D Materials, Moscow Institute of Physics and Technology, Dolgoprudny, 141700, Russia., Cappello B; Department of Electronics and Telecommunications, Politecnico di Torino, I-10129, Torino, Italy., Matekovits L; Department of Electronics and Telecommunications, Politecnico di Torino, I-10129, Torino, Italy., Gorlach MA; Department of Physics and Engineering, ITMO University, Saint Petersburg, 197101, Russia. m.gorlach@metalab.ifmo.ru. |
| Abstrakt: |
Topological physics opens up a plethora of exciting phenomena allowing to engineer disorder-robust unidirectional flows of light. Recent advances in topological protection of electromagnetic waves suggest that even richer functionalities can be achieved by realizing topological states of quantum light. This area, however, remains largely uncharted due to the number of experimental challenges. Here, we take an alternative route and design a classical structure based on topolectrical circuits which serves as a simulator of a quantum-optical one-dimensional system featuring the topological state of two photons induced by the effective photon-photon interaction. Employing the correspondence between the eigenstates of the original problem and circuit modes, we use the designed simulator to extract the frequencies of bulk and edge two-photon bound states and evaluate the topological invariant directly from the measurements. Furthermore, we perform a reconstruction of the two-photon probability distribution for the topological state associated with one of the circuit eigenmodes. |
