193 citations · 1k across the 34 of their papers we have counts for
34 papers
Remote Flux Refocuses Nonadiabatic Excursions in Compact-State Quantum Transfer
X. S. Meng, Y. S. Liu, X. Z. Zhang
Compact states embedded in a propagating band can carry quantum information, but finite-time transfer can populate modes outside their subspace. We show that a remote flux can refo…
Coherence-Mediated Boundary Control of the Liouvillian Gap in Nonreciprocal Open Quantum Systems
K. L. Li, M. H. Yu, X. Z. Zhang
We study a single-particle Lindblad lattice in which nonreciprocal incoherent hopping is combined with a tunable coherent boundary link. The link changes the Hamiltonian boundary c…
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…
Wave-packet revival in a Floquet engineering quadratic potential system
J. Cao, H. Shen, R. Wang +1
We investigate the quantum dynamics of a one-dimensional tight-binding lattice driven by a spatially quadratic and time-periodic potential. Both Hermitian () and non-Her…
Demonstration of High-Efficiency Microwave Heating Producing Record Highly Charged Xenon Ion Beams with Superconducting ECR Ion Sources
X. Wang, J. B. Li, V. Mironov +11
Intense highly charged ion beam production is essential for high-power heavy ion accelerators. A novel movable Vlasov launcher for superconducting high charge state Electron Cyclot…
Magnetization in a non-equilibrium quantum spin system
X. Z. Zhang
The dynamics described by the non-Hermitian Hamiltonian typically capture the short-term behavior of open quantum systems before quantum jumps occur. In contrast, the long-term dyn…
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…
Steady off-diagonal long-range order state in a half-filled dimerized Hubbard chain induced by a resonant pulsed field
X. Z. Zhang, Z. Song
We show that a resonant pulsed field can induce a steady superconducting state even in the deep Mott insulating phase of the dimerized Hubbard model. The superconductivity found he…
Insulating-to-conducting state transition in the bilayer Hubbard model induced by a perpendicular quench field
X. Z. Zhang, Z. Song
A many-body quantum system with varying parameters can exhibit two distinct quantum states within the same energy shell. This allows for a dynamic transition from the ground state…
Field induced conducting state in Mott insulator
X. Z. Zhang, Z. Song
Electron--electron repulsion, on the one hand, can result in bound pair, which has heavy effective mass. On the other hand, it is also the cause of Mott insulator. We study the eff…
Optomechanical transistor with mechanical gain
X. Z. Zhang, Lin Tian, Yong Li
We study an optomechanical transistor, where an input field can be transferred and amplified unidirectionally in a cyclic three-mode optomechanical system. In this system, the mech…
Topological phases in Kitaev chain with imbalanced pairing
C. Li, X. Z. Zhang, G. Zhang +1
We systematically study a Kitaev chain with imbalanced pair creation and annihilation, which is introduced by non-Hermitian pairing terms. Exact phase diagram shows that the topolo…
Optical unidirectional amplification in a three-mode optomechanical system
Yong Li, Y. Y. Huang, X. Z. Zhang +1
We study the directional amplification of an optical probe field in a three-mode optomechanical system, where the mechanical resonator interacts with two linearly-coupled optical c…
Existence problem of proton semi-bubble structure in the state of Si
Feng Wu, C. L. Bai, J. M. Yao +2
The fully self-consistent Hartree-Fock (HF) plus random phase approximation (RPA) based on Skyrme-type interaction is used to study the existence problem of proton semi-bubble stru…
Long-range entangled zero-mode state in a non-Hermitian lattice
S. Lin, X. Z. Zhang, C. Li +1
In contrast to a Hermitian system, in which zero modes are usually degenerate and localized edge state in the thermodynamic limit, the zero mode of a finite non-Hermitian system ca…
EPR pairing dynamics in Hubbard model with resonant
X. Z. Zhang, Z. Song
We study the dynamics of the collision between two fermions in Hubbard model with on-site interaction strength . The exact solution shows that the scattering matrix for two-wave…
Quench field sensitivity of two-particle correlation in a Hubbard model
X. Z. Zhang, S. Lin, Z. Song
Short-range interaction can give rise to particle pairing with a short-range correlation, which may be destroyed in the presence of an external field. We study the transition betwe…
Sudden death of particle-pair Bloch oscillation and unidirectional propagation in a one-dimensional driven optical lattice
S. Lin, X. Z. Zhang, Z. Song
We study the dynamics of bound pairs in the extended Hubbard model driven by a linear external field. It is shown that two interacting bosons or singlet fermions with nonzero on-si…
Amplitude control of a quantum state in a non-Hermitian Rice-Mele model driven by an external field
S. Lin, X. Z. Zhang, Z. Song
In the Hermitian regime, a Berry phase is always the real number. It may be imaginary for a non-Hermitian system, which leads to amplitude amplification or attenuation of an evolve…
Transmission phase lapse in the non-Hermitian Aharonov-Bohm interferometer near the spectral singularity
G. Zhang, X. Q. Li, X. Z. Zhang +1
We study the effect of PT-symmetric imaginary potentials embedded in the two arms of an Aharonov-Bohm interferometer on the transmission phase by finding an exact solution for a co…
Asymmetric transmission through a flux-controlled non-Hermitian scattering center
X. Q. Li, X. Z. Zhang, G. Zhang +1
We study the possibility of asymmetric transmission induced by a non-Hermitian scattering center embedded in a one-dimensional waveguide, motivated by the aim of realizing quantum…
Conventional quantum phase transition driven by complex parameter in non-Hermitian PT-symmetric Ising model
C. Li, G. Zhang, X. Z. Zhang +1
A conventional quantum phase transition (QPT) can be accessed by varying a real parameter at absolute zero temperature. Motivated by the discovery of the pseudo-Hermiticity of non-…
Complete particle-pair annihilation as a dynamical signature of the spectral singularity
G. R. Li, X. Z. Zhang, Z. Song
Motivated by the physical relevance of a spectral singularity of interacting many-particle system, we explore the dynamics of two bosons as well as fermions in one-dimensional syst…
Geometric phase and phase diagram for non-Hermitian quantum XY model
X. Z. Zhang, Z. Song
We study the geometric phase for the ground state of a generalized one-dimensional non-Hermitian quantum XY model, which has transverse-field-dependent intrinsic rotation-time reve…