193 citations · 1k across the 34 of their papers we have counts for
21 papers · 1 filter
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…
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…
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…
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…
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…
Momentum-independent reflectionless transmission in the non-Hermitian time-reversal symmetric system
X. Z. Zhang, Z. Song
We theoretically study the non-Hermitian systems, the non-Hermiticity of which arises from the unequal hopping amplitude (UHA) dimers. The distinguishing features of these models a…
Self-sustained emission in semi-infinite non-Hermitian systems at the exceptional point
X. Z. Zhang, L. Jin, Z. Song
Complex potential and non-Hermitian hopping amplitude are building blocks of a non-Hermitian quantum network. Appropriate configuration, such as PT-symmetric distribution, can lead…
Non-Hermitian anisotropic XY model with intrinsic rotation-time reversal symmetry
X. Z. Zhang, Z. Song
We systematically study the non-Hermitian version of the one-dimensional anisotropic XY model, which in its original form, is a unique exactly solvable quantum spin model for under…
Perfect State Transfer in PT-symmetric Non-Hermitian Networks
X. Z. Zhang, L. Jin, Z. Song
We systematically study the parity- and time-reversal (PT) symmetric non-Hermitian version of a quantum network proposed in the paper of Christandl et al. [Phys. Rev. Lett. 92, 187…