Jinbin Li

Nanjing University of Aeronautics and Astronautics

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Hongchuan Du

Lanzhou University

Xiao Zhang

TU Dresden

Bitao Hu

Lanzhou University

Jize Zhao

Lanzhou University

Yongkang Feng

China University of Petroleum, East China

Silin Fu

Laboratoire d'Optique Appliquée

Xue‐Hui Dong

South China University of Technology

Ming Xue

Nanjing University of Aeronautics and Astronautics

Shengjun Yue

Lanzhou University

Daning Shi

Nanjing University of Aeronautics and Astronautics

Cooperative Institutions

Nanjing University of Aeronautics and Astronautics

Chinese Academy of Sciences

Lanzhou University

South China University of Technology

Ministry of Industry and Information Technology

Peking University

Tsinghua University

National University of Defense Technology

Zhejiang University

Institute of Theoretical Physics

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Commutator Representation of Heisenberg equation hierarchy

Journal of Shanxi University (1999)

Jinbin Li

In this paper,by making use of spectral gradient mdthod, the operator pairs of Heisenberg equation is given and Heisenberg equation hierarchy is obtained. Then through resolving a key equation, the commutator representation of this hierachy of the Heisenberg equation is obtained.

Heisenberg group

Commutator

Operator (biology)

Heisenberg picture

Representation

Heisenberg model

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Citations (0)

Quantitatively unravel the effect of chain length heterogeneity on polymer crystallization using discrete oligo l-lactide

Polymer (2021)

Dongdong Zhou Miao Xu Rui Tan Yanxiao Sun Zhuang Ma

Supercooling

Metastability

Molar mass distribution

Chain (unit)

10.1016/j.polymer.2021.123746

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Citations (4)

Slave-particle approach to the finite-temperature properties of ultracold Bose gases in optical lattices

Physical Review A (2006)

Xiancong Lu Jinbin Li Yue Yu

By using slave particle (slave boson and slave fermion) techniques on the Bose-Hubbard model, we study the finite temperature properties of ultracold Bose gases in optical lattices. The phase diagrams at finite temperature are depicted by including different types of slave particles and the effect of the finite types of slave particles is estimated. The superfluid density is evaluated using the Landau second order phase transition theory. The atom density, excitation spectrum, and dispersion curve are also computed at various temperatures, and how the Mott-insulator evolves as the temperature increases is demonstrated. For most quantities to be calculated, we find that there are no qualitative differences in using the slave boson or the slave fermion approaches. However, when studying the stability of the mean field state, we find that in contrast to the slave fermion approach, the slave boson mean field state is not stable. Although the slave boson mean field theory gives a qualitatively correct phase boundary, it corresponds to a local maximum of Landau free energy and cannot describe the second order phase transition because the coefficient ${a}_{4}$ of the fourth order term is always negative in the free energy expansion.

Mean field theory

Optical lattice

Phase boundary

Bose–Hubbard model

10.1103/physreva.73.043607

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Citations (13)

Phase separation of a two-component dipolar Bose-Einstein condensate in the quasi-one-dimensional and quasi-two-dimensional regime

Physical Review A (2011)

Kui-Tian Xi Jinbin Li Daning Shi

We consider a two-component Bose-Einstein condensate, which contains atoms with magnetic dipole moments aligned along the $z$ direction (labeled as component 1) and nonmagnetic atoms (labeled as component 2). The problem is studied by means of exact numerical simulations. The effects of dipole-dipole interaction on phase separations are investigated. It is shown that, in the quasi-one-dimensional regime, the atoms in component 2 are squeezed out when the dimensionless dipolar strength parameter is small, whereas the atoms in component 1 are pushed out instead when the parameter is large. This is in contrast to the phenomena in the quasi-two-dimensional regime. These two components are each kicked out by the other in the quasi-one-dimensional regime and this phenomenon is discussed as well.

Dimensionless quantity

Component (thermodynamics)

10.1103/physreva.84.013619

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Citations (20)

Effect of Molecular Architecture and Symmetry on Self-Assembly: A Quantitative Revisit Using Discrete ABA Triblock Copolymers

ACS Macro Letters (2022)

Dong Cai Jinbin Li Zhuang Ma Zhanhui Gan Yu Shao

The inherent statistical heterogeneities associated with chain length, composition, and architecture of synthetic block copolymers compromise the quantitative interpretation of their self-assembly process. This study scrutinizes the contribution of molecular architecture on phase behaviors using discrete ABA triblock copolymers with precise chemical structure and uniform chain length. A group of discrete triblock copolymers with varying composition and symmetry were modularly synthesized through a combination of iterative growth methods and efficient coupling reactions. The symmetric ABA triblock copolymers self-assemble into long-range ordered structures with expanded domain spacings and enhanced phase stability, compared with the diblock counterparts snipped at the middle point. By tuning the relative chain length of two end blocks, the molecular asymmetry reduces the packing frustration, and thus increases the order-to-disorder transition temperature and enlarges the domain sizes. This study would serve as a quantitative model system to correlate the experimental observations with the theoretical assessments and to provide quantitative understandings for the relationship between molecular architecture and self-assembly.

Chain (unit)

10.1021/acsmacrolett.1c00788

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Citations (25)

Electron interaction effects on spin injection into semiconductors

arXiv (Cornell University) (2002)

Yue Yu Jinbin Li S. T. Chui

We consider spin polarized transport in a ferromagnet-insulator/semiconductor/insulator-ferromagnet (F1-I-S-I-F2) junction. We find that the spin current is strongly dependent on the spin configurations, the doping and space charge distribution in the semiconductor. When the ferromagnet-semiconductor interface resistance is comparable to the semiconductor resistance, the magnetoresistance ratio of this junction can be greatly enhanced under appropriate doping when the space charge effect in the nonequilibrium transport processes is taken into consideration.

Magnetic semiconductor

Spin Current

Intrinsic semiconductor

Source

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Localization of a two-component Bose–Einstein condensate in a two-dimensional bichromatic optical lattice

Physica B Condensed Matter (2013)

Kui-Tian Xi Jinbin Li Daning Shi

Component (thermodynamics)

Sine

Optical lattice

Lattice (music)

10.1016/j.physb.2013.12.010

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Citations (8)

Successive topological phase transitions in two distinct spin-flop phases on the honeycomb lattice

Physical review. B./Physical review. B (2025)

Xudong Li Jize Zhao Jinbin Li Qiang Luo

Lattice (music)

Honeycomb

10.1103/physrevb.111.064416

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Quantum Monte Carlo simulation of tow-dimensional antiferromagnetic Heisenberg model

Journal of Guangxi University (2011)

Jinbin Li

The Antiferromagnetic Heisenberg Model with spin 1/2 on a square lattice was simulated by using the Stochastic Series Expansion(SSE) Quantum Monte Carlo Method.The temperature dependence of the internal energy,specific heat and uniform susceptibility was observed.The results showed that specific heat has a maximum at kT/J=0.6 and uniform susceptibility saturates at kT/J=1 for the isotropy case.And the size of lattice also affects the temperature dependence of these thermodynamic quantities.For the anisotropy case,energy decreases with anisotropic parameter g increasing.Susceptibility changes slowly with temperature for g1 and exponentially decay for g1 in the low temperature region and its behaviors approach consistent for different g in the high temperature region.

Heisenberg model

Internal energy

Square lattice

Lattice (music)

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Ellipticity dependence transition induced by dynamical Bloch oscillations

Physical review. B./Physical review. B (2019)

Xiao Zhang Jinbin Li Zongsheng Zhou Shengjun Yue Hongchuan Du

The dependence of high-harmonic generation (HHG) on laser ellipticity is investigated using a modified ZnO model. In the driving of relatively weak field, we reproduce qualitatively the ellipticity dependence as observed in the HHG experiment of wurtzite ZnO. When increasing the field strength, the HHG shows an anomalous ellipticity dependence, similar to that observed experimentally in the single-crystal MgO. With the help of a semiclassical analysis, it is found that the key mechanism inducing the change of ellipticity dependence is the interplay between the dynamical Bloch oscillation and the anisotropic band structure. The dynamical Bloch oscillation contributes additional quantum paths, which are less sensitive to ellipticity. The anisotropic band-structure make the driving pulse with finite ellipticity be able to drive the pairs to the band positions with larger gap, which extends the harmonic cutoff. The combination of these two effects leads to the anomalous ellipticity dependence. The result reveals the importance of dynamical Bloch oscillations for the ellipticity dependence of HHG from bulk ZnO.

Bloch oscillations

Semiclassical physics

Oscillation (cell signaling)

Bloch wave

Cut-off

Wurtzite crystal structure

10.1103/physrevb.99.014304

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Citations (46)