{"department":[{"_id":"15"}],"type":"preprint","citation":{"apa":"Wingenbach, J., Schumacher, S., &#38; Ma, X. (2023). Tweaking Spectral Topology and Exceptional Points by Nonlinearity in   Non-Hermitian Polariton Systems. In <i>arXiv:2305.04855</i>.","mla":"Wingenbach, Jan, et al. “Tweaking Spectral Topology and Exceptional Points by Nonlinearity in   Non-Hermitian Polariton Systems.” <i>ArXiv:2305.04855</i>, 2023.","chicago":"Wingenbach, Jan, Stefan Schumacher, and Xuekai Ma. “Tweaking Spectral Topology and Exceptional Points by Nonlinearity in   Non-Hermitian Polariton Systems.” <i>ArXiv:2305.04855</i>, 2023.","ama":"Wingenbach J, Schumacher S, Ma X. Tweaking Spectral Topology and Exceptional Points by Nonlinearity in   Non-Hermitian Polariton Systems. <i>arXiv:230504855</i>. Published online 2023.","bibtex":"@article{Wingenbach_Schumacher_Ma_2023, title={Tweaking Spectral Topology and Exceptional Points by Nonlinearity in   Non-Hermitian Polariton Systems}, journal={arXiv:2305.04855}, author={Wingenbach, Jan and Schumacher, Stefan and Ma, Xuekai}, year={2023} }","ieee":"J. Wingenbach, S. Schumacher, and X. Ma, “Tweaking Spectral Topology and Exceptional Points by Nonlinearity in   Non-Hermitian Polariton Systems,” <i>arXiv:2305.04855</i>. 2023.","short":"J. Wingenbach, S. Schumacher, X. Ma, ArXiv:2305.04855 (2023)."},"year":"2023","author":[{"first_name":"Jan","last_name":"Wingenbach","full_name":"Wingenbach, Jan"},{"first_name":"Stefan","full_name":"Schumacher, Stefan","last_name":"Schumacher"},{"last_name":"Ma","full_name":"Ma, Xuekai","first_name":"Xuekai"}],"user_id":"59416","date_created":"2023-09-29T09:18:52Z","external_id":{"arxiv":["2305.04855"]},"_id":"47529","status":"public","publication":"arXiv:2305.04855","abstract":[{"text":"Exceptional points (EPs) with their intriguing spectral topology have\nattracted considerable attention in a broad range of physical systems, with\npotential sensing applications driving much of the present research in this\nfield. Here we theoretically demonstrate the realization of EPs in a system\nwith significant nonlinearity, a non-equilibrium exciton-polariton condensate.\nWith the possibility to control loss and gain and nonlinearity by optical\nmeans, this system allows for a comprehensive analysis of the interplay of\nnonlinearities (Kerr-type and saturable gain) and non-Hermiticity. Not only do\nwe find that EPs can be intentionally shifted in parameter space by the\nsaturable gain, we also observe intriguing rotations and intersections of\nRiemann surfaces, and find nonlinearity-enhanced sensing capabilities. Our\nresults are quite general in nature and illustrate the potential of tailoring\nspectral topology and related phenomena in non-Hermitian systems by\nnonlinearity.","lang":"eng"}],"title":"Tweaking Spectral Topology and Exceptional Points by Nonlinearity in\n  Non-Hermitian Polariton Systems","date_updated":"2023-09-29T11:28:01Z"}