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- W2985939495 abstract "Standard exceptional points (EPs) are non-Hermitian degeneracies that occur in open systems. At an EP, the Taylor series expansion becomes singular and fails to converge---a feature that was exploited for several applications. Here, we theoretically introduce and experimentally demonstrate a new class of parity-time symmetric systems [implemented using radio frequency (rf) circuits] that combine EPs with another type of mathematical singularity associated with the poles of complex functions. These nearly divergent exceptional points can exhibit an unprecedentedly large eigenvalue bifurcation beyond those obtained by standard EPs. Our results pave the way for building a new generation of telemetering and sensing devices with superior performance." @default.
- W2985939495 created "2019-11-22" @default.
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- W2985939495 date "2019-11-07" @default.
- W2985939495 modified "2023-10-09" @default.
- W2985939495 title "Experimental Observation of <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>P</mml:mi><mml:mi>T</mml:mi></mml:math> Symmetry Breaking near Divergent Exceptional Points" @default.
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- W2985939495 doi "https://doi.org/10.1103/physrevlett.123.193901" @default.
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