15 papers
Mixed-State Topology in Non-Hermitian Systems
Shou-Bang Yang, Pei-Rong Han, Wen Ning +3
Non-Hermitian (NH) systems, owing to the existence of exceptional point (or ring and surface), exhibit exotic topological features which are inaccessible in Hermitian systems. Whil…
Geometric criticality in the driven Jaynes-Cummings model
Ken Chen, Jia-Hao Lv, Hao-Long Zhang +4
When the photonic mode in the Jaynes-Cummings model is driven by an external classical field, the system can undergo the photon-blockade breakdown phase transition at a critical po…
Experimental observation of non-Markovian quantum exceptional points
Hao-Long Zhang, Pei-Rong Han, Fan Wu +3
One of the most remarkable features that distinguish open systems from closed ones is the presence of exceptional points (EPs), where two or more eigenvectors of a non-Hermitian op…
Nonadiabatic transitions in non-Hermitian -symmetric two-level systems
Jian-Song Pan, Fan Wu
We systematically characterize the dynamical evolution of time-parity (PT )-symmetric two-level systems with spin-dependent dissipations. If the control parameters of the gap are l…
High-efficiency loading of 2,400 Ytterbium atoms in optical tweezer arrays
Jiawen Zhu, Changfeng Chen, Li Zhou +10
Neutral atom arrays have emerged as a powerful platform for quantum computation, simulation, and metrology.Among them, alkaline-earth-like atoms exhibit distinct advantages, includ…
Critical quantum metrology robust against dissipation and non-adiabaticity
Jia-Hao Lü, Wen Ning, Fan Wu +6
Critical systems near quantum phase transitions were predicted to be useful for improvement of metrological precision, thanks to their ultra-sensitive response to a tiny variation…