8 papers
Observation of Non-Hermitian Skin Dynamics in the Liouvillian Regime
Shu Yang, Yeyang Sun, Lingrui Hong +1
Open quantum systems generally do not perfectly preserve phase coherence: coupling to uncontrolled environments requires a density-matrix description based on the Liouvillian frame…
Observation of Floquet erratic non-Hermitian skin effect in photonic mesh lattice
Yeyang Sun, Shu Yang, Yi Yang
In ordered, translationally invariant non-Hermitian systems, the skin effect is understood as a boundary phenomenon: nonreciprocal hopping drives an extensive accumulation of eigen…
Non-Resonant Boundary Time Crystals from Quantum Synchronization Breakdown
Jun Wang, Shu Yang, Zeqing Wang +4
Quantum synchronization (QS) in dissipative systems is often inferred from smooth phase locking, leaving open whether its breakdown constitutes a genuine nonequilibrium transition.…
Non-Abelian Electric Field and Zitterbewegung on a Photonic Frequency Chain
Shu Yang, Bengy Tsz Tsun Wong, Yi Yang
The synthetic frequency dimension, which realizes fictitious spatial dimensions from the spectral degree of freedom, has emerged as a promising platform for engineering artificial…
Parity-time symmetry phase transition in photonic time-modulated media
Rui-Chuan Zhang, Shu Yang, Yixin Sha +2
Time modulation can cause gain and loss in photonic media, leading to complex modal behaviors and enhanced wave controllability in the non-Hermitian regime. Conversely, we reveal t…
Emergent Continuous Time Crystal in Dissipative Quantum Spin System without Driving
Shu Yang, Zeqing Wang, Libin Fu +1
Time crystals are a nonequilibrium phase of matter that extend fundamental spontaneous symmetry breaking into the temporal dimension, typically requiring external driving for their…