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 . We conclude that the state excited at the singularity has a definitive chirality.
- Received 19 July 2002
DOI:https://doi.org/10.1103/PhysRevLett.90.034101
©2003 American Physical Society