Related Experiment Video
Updated: Jan 24, 2026

Extended Time-lapse Intravital Imaging of Real-time Multicellular Dynamics in the Tumor Microenvironment
Published on: June 12, 2016
Observation of emergent momentum-time skyrmions in parity-time-symmetric non-unitary quench dynamics
Kunkun Wang1,2, Xingze Qiu3,4, Lei Xiao1,2
1Beijing Computational Science Research Center, 100084, Beijing, China.
Abstract:
Topology in quench dynamics gives rise to intriguing dynamic topological phenomena, which are intimately connected to the topology of static Hamiltonians yet challenging to probe experimentally. Here we theoretically characterize and experimentally detect momentum-time skyrmions in parity-time [Formula: see text]-symmetric non-unitary quench dynamics in single-photon discrete-time quantum walks. The emergent skyrmion structures are protected by dynamic Chern numbers defined for the emergent two-dimensional momentum-time submanifolds, and are revealed through our experimental scheme enabling the construction of time-dependent non-Hermitian density matrices via direct measurements in position space. Our work experimentally reveals the interplay of [Formula: see text] symmetry and quench dynamics in inducing emergent topological structures, and highlights the application of discrete-time quantum walks for the study of dynamic topological phenomena.
Related Concept Videos
Generation Time
Mixing Time
Mean free path and Mean free time
Time Course of Drug Effect
Setting Time of Cement
Timing and Consequences on Behavior
Humans, however, can respond to delayed reinforcers. We often make decisions between immediate small rewards and delayed larger rewards. This ability to delay gratification is a significant...

