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How to spawn an “exceptional ring”

A schematic drawing of how a ring of exceptional points (shown in white) can be spawned from a Dirac point (a dot), and thus change the dispersion from the normal, widely known conical shape into an exotic lantern-like shape Courtesy of the researchers

Researchers create exotic states that could lead to new kinds of sensors and optical devices. << more >>

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How to spawn an “exceptional ring” (MIT News)

Prof. Marin Soljačić