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Topologically protected bound states in photonic parity-time-symmetric crystals.
Parity-time (PT)-symmetric crystals are a class of non-Hermitian systems that allow, for example, the existence of modes with real propagation constants, for self-orthogonality of propagating modes,Expand
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Topological funneling of light
A topological light funnel Because most physical systems cannot be totally isolated from their environment, some degree of dissipation or loss is expected. The successful operation of such systemsExpand
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Baryon sum rules and chiral symmetry breaking
Abstract In an SVZ-type approach sum rules for baryonic currents have been investigated, without radiative QCD corrections but with the inclusion of non-perturbative terms due to the non-vanishingExpand
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Switching Light at the Interface Between Anomalous Floquet Topological Insulators
We study interface states at the boundary between two Anomalous Floquet Photonic Topological Insulators and show how their interactions with an edge mode can be used to switch it via the topologicalExpand
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Demonstration of a two-dimensional $${\cal P}{\cal T}$$PT-symmetric crystal
With the discovery of $${\cal P}{\cal T}$$PT-symmetric quantum mechanics, it was shown that even non-Hermitian systems may exhibit entirely real eigenvalue spectra. This finding did not only changeExpand
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Efficient Light Funneling based on the non-Hermitian Skin Effect
In the last two decades, the ubiquitous effect of dissipation has proven to entail astonishing non-Hermitian features, rather than just being an inescapable nuisance. As an alternative route toExpand
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A square-root topological insulator with non-quantized indices realized with photonic Aharonov-Bohm cages
Topological Insulators are a novel state of matter where spectral bands are characterized by quantized topological invariants. This unique quantized nonlocal property commonly manifests throughExpand
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Model independent determination of QCD quark masses
Abstract The method of approximate analytic continuation by duality (ACD), which permits to extrapolate a two-point function from its asymptotic QCD form down to Q2 = 0, is used to determine theExpand
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Experimental Realization of PT-Symmetric Flat Bands.
The capability to temporarily arrest the propagation of optical signals is one of the main challenges hampering the ever more widespread use of light in rapid long-distance transmission as well asExpand
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Non-quantized square-root topological insulators: a realization in photonic Aharonov-Bohm cages
Topological Insulators are a novel state of matter where spectral bands are characterized by quantized topological invariants. This unique quantized non-local property commonly manifests throughExpand
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