Topological edge states of interacting photon pairs emulated in a topolectrical circuit
| Autor: | Ladislau Matekovits, Ekaterina M. Puhtina, Egor I. Kretov, Barbara Cappello, Andrei A. Stepanenko, Vitaly Yaroshenko, Maxim A. Gorlach, N. A. Olekhno, Dmitry Filonov, Polina A. Ivanova |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Photon
Science FOS: Physical sciences General Physics and Astronomy edge states 02 engineering and technology Topology 01 natural sciences Electromagnetic radiation Article General Biochemistry Genetics and Molecular Biology law.invention law Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Bound state Topological insulators photon pair Single photons and quantum effects lcsh:Science 010306 general physics Quantum Eigenvalues and eigenvectors Electronic circuit Physics Quantum Physics Multidisciplinary Condensed Matter - Mesoscale and Nanoscale Physics General Chemistry Invariant (physics) 021001 nanoscience & nanotechnology Electrical and electronic engineering Topology edge states photon pair Electrical network lcsh:Q Quantum Physics (quant-ph) 0210 nano-technology Physics - Optics Optics (physics.optics) |
| Zdroj: | Nature Communications, Vol 11, Iss 1, Pp 1-8 (2020) Nature Communications |
| Popis: | 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. Experimental studies of topological phenomena for interacting quantum systems are challenging. Here, the authors exploit the analogy between a quantum two-body problem in one dimension and a classical two-dimensional problem, emulating two-photon topological bound states in 1D using a 2D electrical circuit. |
| Databáze: | OpenAIRE |
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