83 citations · 395 across the 22 of their papers we have counts for
22 papers
Complexity of the Laughlin wave function from the Dyson-orbital perspective
J. M. Zhang, Y. Liu
The Fermi sea is a simple and common concept in physics. However, a related and equally simple concept -- the Dyson orbital -- is far less discussed in physics, especially in textb…
Hartree-Fock approximation for bosons with symmetry-adapted variational wave functions
B. R. Que, J. M. Zhang, H. F. Song +1
The Hartree-Fock approximation for bosons employs variational wave functions that are a combination of permanents. These are bosonic counterpart of the fermionic Slater determinant…
Pressure effect on the topologically nontrivial electronic state and transport of lutecium monobismuthide
H. Gu1, F. Tang, Y. -R. Ruan +9
Rare-earth monopnictides are predicted to be nontrivial semimetal candidates and show pressure-induced superconductivity. Here, we grow LuBi single crystal and study the magnetizat…
An exactly solvable toy model
X. G. Wang, J. M. Zhang
In an attempt to regularize a previously known exactly solvable model [Yang and Zhang, Eur. J. Phys. \textbf{40}, 035401 (2019)], we find yet another exactly solvable toy model. Th…
Inferring the smoothness of the autocorrelation function from that of the initial state
K. L. Yang, J. M. Zhang
We point out that by the ``smoothness means fast decay'' principle in Fourier analysis, it is possible to infer the smoothness (or nonsmoothness) of the autocorrelation function fr…
Dynamical Friedel oscillations of a Fermi sea
J. M. Zhang, Y. Liu
We study the scenario of quenching an interaction-free Fermi sea on a one-dimensional lattice ring by suddenly changing the potential of a site. From the point-of-view of the conve…
Witnessing a Poincaré recurrence with Mathematica
J. M. Zhang, Y. Liu
The often elusive Poincaré recurrence can be witnessed in a completely separable system. For such systems, the problem of recurrence reduces to the classic mathematical problem of…
Sudden jumps and plateaus in the quench dynamics of a Bloch state
J. M. Zhang, Hua-Tong Yang
We take a one-dimensional tight binding chain with periodic boundary condition and put a particle in an arbitrary Bloch state, then quench it by suddenly changing the potential of…
Fermi's golden rule: its derivation and breakdown by an ideal model
J. M. Zhang, Y. Liu
Fermi's golden rule is of great importance in quantum dynamics. However, in many textbooks on quantum mechanics, its contents and limitations are obscured by the approximations and…
Concise configuration interaction expansions for three fermions in six orbitals
Alex D. Gottlieb, Norbert J. Mauser, J. M. Zhang
The Hilbert space for three fermions in six orbitals, lately dubbed the "Borland-Dennis setting," is a proving ground for insights into electronic structure. Borland and Dennis dis…
Cusps in the quench dynamics of a Bloch state
J. M. Zhang, Hua-Tong Yang
We report some nonsmooth dynamics of a Bloch state in a one-dimensional tight binding model with the periodic boundary condition. After a sudden change of the potential of an arbit…
Optimal Slater-determinant approximation of fermionic wave functions
J. M. Zhang, Norbert J. Mauser
We study the optimal Slater-determinant approximation of an -fermion wave function analytically. That is, we seek the Slater-determinant (constructed out of orthonormal sing…
Nonsmooth and level-resolved dynamics illustrated with the tight binding model
J. M. Zhang, Masudul Haque
We point out that in the first order time-dependent perturbation theory, the transition probability may behave nonsmoothly in time and have kinks periodically. Moreover, the detail…
Integrability and weak diffraction in a two-particle Bose-Hubbard model
Daniel Braak, J. M. Zhang, Marcus Kollar
A recently introduced one-dimensional two-particle Bose-Hubbard model with a single impurity is studied on finite lattices. The model possesses a discrete reflection symmetry and w…
Optimal multi-configuration approximation of an N-fermion wave function
J. M. Zhang, Marcus Kollar
We propose a simple iterative algorithm to construct the optimal multi-configuration approximation of an -fermion wave function. That is, single-particle orbitals are…
Bound States in the Continuum Realized in the One-Dimensional Two-Particle Hubbard Model with an Impurity
J. M. Zhang, Daniel Braak, Marcus Kollar
We report a bound state of the one-dimensional two-particle (bosonic or fermionic) Hubbard model with an impurity potential. This state has the Bethe-ansatz form, although the mode…
Controlling phase separation of a two-component Bose-Einstein condensate by confinement
L. Wen, W. M. Liu, Yongyong Cai +2
We point out that the widely accepted condition g11g22<g122 for phase separation of a two-component Bose-Einstein condensate is insufficient if kinetic energy is taken into account…
The generalized Gibbs ensemble as a pseudo-initial state: its predictive power revealed in a second quench
J. M. Zhang, F. C. Cui, Jiangping Hu
The generalized Gibbs ensemble has been shown to be relevant in the relaxation of a completely integrable system subject to a quantum quench, in the sense that it accurately predic…
Directed coherent transport due to Bloch oscillation in two dimensions
J. M. Zhang, W. M. Liu
We point out that in higher dimensions, in contrast to the one dimensional case considered usually, Bloch oscillation driven by a static force can induce transport of the wave pack…
Strong thermalization of the two-component Bose-Hubbard model at finite temperatures
J. M. Zhang, C. Shen, W. M. Liu
We study thermalization of a two-component Bose-Hubbard model by exact diagonalization. Initially the two components do not interact and are each at equilibrium but with different…
Light scattering detection of quantum phases of ultracold atoms in optical lattices
Jinwu Ye, J. M. Zhang, W. M. Liu +3
Ultracold atoms loaded on optical lattices can provide unprecedented experimental systems for the quantum simulations and manipulations of many quantum phases. However, so far, how…
Probing the quantum ground state of a spin-1 Bose-Einstein condensate with cavity transmission spectra
J. M. Zhang, S. Cui, H. Jing +2
We propose to probe the quantum ground state of a spin-1 Bose-Einstein condensate with the transmission spectra of an optical cavity. By choosing a circularly polarized cavity mode…