Back Cover: Universal Quantum Fisher Information and Simultaneous Occurrence of Landau-Class and Topological-Class Transitions in Non-Hermitian Jaynes-Cummings Models (Adv. Quantum Technol. 10/2024)

Abstract

Light–matter interaction can bridge critical phenomena, topological transitions, quantum metrology, and non-Hermitian physics, bringing novel implications. In non-Hermitian Jaynes–Cummings models with PT and anti-PT symmetries, the quantum Fisher information manifests criticality and super-universality around exceptional points (as shown in article number 2400288 by Zu-Jian Ying), providing a universally high sensitivity resource for quantum metrology. The simultaneous occurrence of conventionally incompatible critical Landau-class transition and topological transition is realized, with conceptional renovation and more potential in designing quantum sensors.