11 citations · 22 across the 18 of their papers we have counts for
19 papers
Emergent one-dimensional Bloch oscillations in coupled Ising layers
E. S. Ma, Z. Song
Bloch oscillations typically arise in periodic systems subjected to a constant force generated by a potential gradient. Here, we study domain-wall dynamics in coupled Ising layers…
Pair Filters in an Extended Hubbard Model at Resonance
Ensuo Ma, Zhi Song
We investigate the dynamics of bound pairs in an extended Hubbard model at resonance. We show that a single fermion and a singlet bound pair possess identical dispersion relations…
Pairing-induced Bloch oscillations in an interacting Kitaev chain
E. S. Ma, Z. Song
We study the peculiar dynamics of the Kitaev chain induced by nearest-neighbor (NN) interaction. We show that a strong NN interaction suppresses single-particle hopping but enhance…
Boundary-dependent topological degeneracy in an Ising chain
E. S. Ma, Z. Song
The influence of boundary conditions on bulk properties is generally expected to vanish in the thermodynamic limit. Here we show that this expectation can fail in an open transvers…
Condensate states in Fermi and Bose-Hubbard ladders
F. X. Liu, E. S. Ma, Z. Song
Although neither hardcore bosons nor fermions can occupy the same single-site state, they still obey different statistics, resulting in distinct many-particle quantum states, such…
Hilbert space fragmentation in quantum Ising systems induced by side coupling
E. S. Ma, Z. Song
We study Hilbert space fragmentation and quantum scars in quantum spin systems with Ising interactions. The system consists of two sets of quantum spins, A and B. As the parent sys…
Exceptional nodal rings emerging in spinful Rice-Mele chains
E. S. Ma, Z. Song
The Weyl exceptional nodal lines usually occur in 3D topological semimetals, but also emerge in the parameter space of 1D systems. In this work, we study the impact of dissipation…
Dynamic destruction of magnetic order in a quantum Ising chain with oscillating transverse field
E. S. Ma, Z. Song
We study the dynamic response of magnetic domain walls in low-lying excited states of an Ising chain to an oscillating transverse field. Based on the exact instantaneous eigenstate…
Dynamically stable topological edge states in an extended Su-Schrieffer-Heeger ladder with balanced perturbation
E. S. Ma, K. L. Zhang, Z. Song
The on-site potentials may break the symmetry of a system, resulting in the loss of its original topology protected by the symmetry. In this work, we study the counteracting effect…
Condensate ground states of hardcore bosons induced by an array of impurities
J. Y. Liu-Sun, E. S. Ma, Z. Song
Neither hardcore bosons nor fermions can occupy the same lattice site-state. However, a nearest neighbour interaction may counteract the hardcore effect, resulting in condensate st…
Topological quantized edge-pumping-spin flip in Rice-Mele model with spin-orbit coupling
E. S. Ma, Z. Song
The quantized Thouless pumping charge in a spinless Rice-Mele (RM) model originates from a degeneracy point in the parameter space and cannot be detected when open boundary conditi…
Non-Hermitian dynamics of Cooper pair splitter
E. S. Ma, Z. Song
We propose a non-Hermitian model for Cooper pair splitters, in which the process of electron tunneling into electrodes is characterized by non-Hermitian terms. We find that across…
Topological charge pumping in dimerized Kitaev chains
E. S. Ma, Z. Song
We investigated the topological pumping charge of a dimerized Kitaev chain with spatially modulated chemical potential, which hosts nodal loops in parameter space and violates part…
Real-space decomposition of -wave Kitaev chain
D. K. He, E. S. Ma, Z. Song
We propose an extended Bogoliubov transformation in real space for spinless fermions, based on which a class of Kitaev chains of length with zero chemical potential can be map…
Topological bulk and edge correlations of BCS condensate in a two-dimensional singlet-triplet spin pairing model
E. S. Ma, K. L. Zhang, Z. Song
The condensate of the Bardeen-Cooper-Schrieffer (BCS) pair in the ground state, which may contain information on both topology and spin pairing, promises the superconductivity of t…
Polarity of the fermionic condensation in the -wave Kitaev model on a square lattice
E. S. Ma, Z. Song
In a -wave Kitaev model, the nearest neighbor pairing term results in the formation of the Bardeen-Cooper-Schrieffer (BCS) pair in the ground state. In this work, we study the f…
Superconducting state generated dynamically from distant pair source and drain
E. S. Ma, Z. Song
It has been well established that the origin of p-wave superconductivity is the balance between pair creation and annihilation, described by the spin-less fermionic Kitaev model. I…
Off-diagonal long-range order in the ground state of the Kitaev chain
E. S. Ma, Z. Song
We study a one-dimensional Kitaev model with uniform phase gradient pairing term. We show that the gradient constant dramatically affects the phase diagram, which consists of topol…
Steady helix states in a resonant XXZ Heisenberg model with Dzyaloshinskii-Moriya interaction
E. S. Ma, K. L. Zhang, Z. Song
We systematically investigate possible helix states in XXZ Heisenberg model with Dzyaloshinskii-Moriya (DM) interaction. Exact solutions show that a set of precession helix states…