6 papers
Complex-gauge control of anomalous Floquet corner responses in a non-Hermitian physical-synthetic photonic lattice
W. C. Ning, X. Z. Zhang
We propose a non-Hermitian Floquet photonic lattice formed by a physical resonator coordinate and a synthetic frequency coordinate. A two-step modulation protocol realizes a chiral…
Microscopic resonant-shell mechanism for slow Liouvillian sectors in an open correlated lattice
X. Z. Zhang
We develop a microscopic theory for how slow Liouvillian sectors are selected in an open correlated lattice. The starting point is not a postulated non-Hermitian band, but a local…
Natural-orbital locking reveals hidden steady-state skin order in Gaussian open fermion chains
Y. T. Wang, X. Z. Zhang
Nonreciprocal relaxation matrices can have skin-localized right eigenmodes, but their imprint on a mixed steady state is not fixed by the density profile alone. We develop an exact…
Graded hopping screens nonreciprocity and reorganizes Stark asymptotics in a non-Hermitian Stark chain
Y. S. Liu, X. Z. Zhang
We study a one-dimensional non-Hermitian Stark chain in which nonreciprocal hopping, a linear potential, and linearly graded hopping act simultaneously. The central question is how…
Single-site dissipation stabilizes a superconducting nonequilibrium steady state in a strongly correlated system
X. Z. Zhang
Can superconducting order be engineered as a robust attractor of open-system dynamics in strongly correlated systems? We demonstrate this possibility by proposing a minimal dissipa…
Emerging topological characterization in non-equilibrium states of quenched Kitaev chains
Y. B. Shi, X. Z. Zhang, Z. Song
Topological characteristics of quantum systems are typically determined by the closing of a gap, while the dynamical quantum phase transition (DQPT) during quantum real-time evolut…