67 citations · 76 across the 12 of their papers we have counts for
12 papers
Josephson-Phase Reversal of Non-Bloch Andreev Propagation
X. Z. Zhang, Hechen Ren
Non-Hermitian control is difficult in solid-state systems due to fixed dissipation. Here, we show that in a spin-orbit-coupled planar Josephson junction, changing only the Josephso…
Interior skin focusing and directional mirror transfer in a graded non-Hermitian Krawtchouk network
Y. S. Liu, X. Z. Zhang
Spatially graded nonreciprocity can move skin weight away from a boundary, but it does not generally preserve a real commensurate spectrum or analytically controlled dynamics. We s…
From local weight selection to Zeno slowdown in an open Su-Schrieffer-Heeger chain with a single local loss
Y. T. Wang, X. Z. Zhang
We study a quadratic open SSH chain with a single-site loss and show that the many-body fermionic Lindblad problem admits an exact reduction to a finite non-Hermitian one-body matr…
Floquet-Sambe Bottleneck and Frequency-Selective Localization in a Driven Synthetic Spin Chain
J. Cao, K. L. Zhang, R. Wang +1
We study a finite Floquet chain in which a uniform nearest-neighbor hopping coexists with a periodically rotating, \textrm{SU(2)}-dictated spin-assisted hopping profile. The result…
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…
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…
Dynamic manifestation of exception points in a non-Hermitian continuous model with an imaginary periodic potential
Y. T. Wang, R. Wang, X. Z. Zhang
Exceptional points (EPs) are distinct characteristics of non-Hermitian Hamiltonians that have no counterparts in Hermitian systems. In this study, we focus on EPs in continuous sys…
High-order exceptional points in supersymmetric arrays
S. M. Zhang, X. Z. Zhang, L. Jin +1
We employ the intertwining operator technique to synthesize a supersymmetric (SUSY) array of arbitrary size . The synthesized SUSY system is equivalent to a spin- under…
Spectral singularity in composite systems and simulation of a resonant lasing cavity
X. Z. Zhang, G. R. Li, Z. Song
We investigate herein the existence of spectral singularities (SSs) in composite systems that consist of two separate scattering centers A and B embedded in one-dimensional free sp…
Non-Hermitian description of the dynamics of inter-chain pair tunnelling
X. Z. Zhang, L. Jin, Z. Song
We study inter-chain pair tunnelling dynamics based on an exact two-particle solution for a two-leg ladder. We show that the Hermitian Hamiltonian shares a common two-particle eige…