Ultrasensitive Parity-Time-Symmetric Micro-Ring Laser Gyroscope

propose a new scheme for ultrasensitive micro-scale ri ng 1 aser g yroscopes based on the physics of exceptional points. I nj udiciouslyde signed non-Hermitian sy stems, the frequency s plitting becomes proportional t o t he s quare root of the gyration speed, thus enhancing the sensitivity to low rotation by orders of magnitudes