Topical Seminar: Metrological applications of non-Gaussian quantum states

por Jiajie Guo (Peking University)

martes 23 sept. 2025 11:30 → 12:30 Europe/Madrid

4-4-4426 - Seminari Física Teòrica (Campus Burjassot)

Compared to well-studied Gaussian states (e.g. coherent states, squeezed states), non-Gaussian quantum states have been greatly developed in recent years and emerged as valuable entanglement resources with promising applications. This talk explores their roles in quantum metrology. First, we introduce an assisted metrological protocol to generate highly sensitive macroscopic superposition states within limited state preparation time. Then, to overcome the challenge that higher-order correlations of non-Gaussian states are difficult to capture, we develop the use of a measurement-after-interaction protocol for single- and multi-parameters estimation tasks. These theoretical tools can be used to investigate rich quantum properties and expand applications for non-Gaussian states.

 

Jiajie Guo is currently a postdoctoral researcher in Physics at Peking University. Her research focuses on quantum entanglement and quantum metrology applications in atomic ensembles and continuous-variable systems. She earned her Ph.D. in 2024 under the supervision of Prof. Qiongyi He, in a research group specializing in the quantum information and quantum optics.