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Observation of a chiral state in a microwave cavity
C Dembowski1, B Dietz, H-D Gräf
1Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
Physical Review Letters
|February 7, 2003
Abstract:
A microwave experiment has been realized to measure the phase difference of the oscillating electric field at two points inside the cavity. The technique has been applied to a dissipative resonator which exhibits a singularity-called exceptional point-in its eigenvalue and eigenvector spectrum. At the singularity, two modes coalesce with a phase difference of pi/2. We conclude that the state excited at the singularity has a definitive chirality.