190 citations · 663 across the 34 of their papers we have counts for
34 papers
Physical Angular Momentum Separation for QED
Weimin Sun
We study the non-uniqueness problem of the gauge-invariant angular momentum separation for the case of QED, which stems from the recent controversy concerning the proper definition…
Gauge invariance, Lorentz covariance and canonical quantization in nucleon structure studies
Fan Wang, X. S. Chen, W. M. Sun +2
There are different operators of quark and gluon momenta, orbital angular momenta, and gluon spin in the nucleon structure study. The precise meaning of these operators are studied…
Physical Decomposition of Photon Angular Momentum
Wei-Min Sun
We address the problem of angular momentum decomposition of a free photon. We propose a natural and physical scheme for separating the total angular momentum operator for a free ph…
A model study of the chiral phase diagram of QCD
Bin Wang, Zhu-Fang Cui, Wei-Min Sun +1
In this paper we study the chiral phase transition of QCD at finite temperature and density by using the rank-2 confining separable gluon propagator model in the framework of Dyson…
A thermodynamically consistent quasi-particle model without density-dependent infinity of the vacuum zero point energy
Liu-jun Luo, Jing Cao, Yan Yan +2
In this paper, we generalize the improved quasi-particle model proposed in J. Cao et al., [ Phys. Lett. B {\bf711}, 65 (2012)] from finite temperature and zero chemical potential t…
The Wigner Solution and QCD Phase Transitions in a Modified PNJL Model
Zhu-fang Cui, Chao Shi, Wei-min Sun +2
By employing some modification to the widely used two-flavor Polyakov-loop extended Nambu-Jona-Lasinio (PNJL) model, we discuss the Wigner solution of the quark gap equation at fin…
Discussion for the Solutions of Dyson-Schwinger Equations at m>0 in QED3
Hui-xia Zhu, Hong-tao Feng, Wei-min Sun +1
In the case of nonzero fermion mass, within a range of Ansatze for the full fermion-boson vertex, we show that Dyson-Schwinger equation for the fermion propagator in QED3 has two q…
Calculation of the staggered spin correlation in the framework of the Dyson-Schwinger approach
Jian-Feng Li, Hong-Tao Feng, Yu Jiang +2
Based on the linear response of the fermion propagator with respect to an external field, we first derive a model-independent expression for the staggered spin susceptibility in wh…
Connecting neutron star observations to the high density equation of state of quasi-particle model
Yan Yan, Jing Cao, Xin-Lian Luo +2
The observation of solar-mass neutron-like star gives constraint on the equation of state (EOS) of cold, condensed matter. In this paper, the EOS for both pure quark…
A thermodynamically consistent quasi-particle model without temperature-dependent infinity of the vacuum zero point energy
Jing Cao, Yu Jiang, Wei-min Sun +1
In this paper, an improved quasi-particle model is presented. Unlike the previous approach of establishing quasi-particle model, we introduce a classical background field (it is al…
Influence of a uniform magnetic field on dynamical chiral symmetry breaking in QED
Jian-Feng Li, Hong-Tao Feng, Yu Jiang +2
We study dynamical chiral symmetry breaking (DCSB) in an effective QED theory of d-wave high temperature cuprate superconductors under a uniform magnetic field. At zero tempe…
New application of decomposition of U(1) gauge potential:Aharonov-Bohm effect and Anderson-Higgs mechanism
Jian-Feng Li, Yu Jiang, Wei-Min Sun +2
In this paper we study the Aharonov-Bohm (A-B) effect and Anderson-Higgs mechanism in Ginzburg-Landau model of superconductors from the perspective of the decomposition of U(1) gau…
Calculation of bulk viscosity of QCD at zero temperature and finite chemical potential
Ming-Min Wang, Yu Jiang, Bin Wang +2
In this letter, based on Kubo's formula and the QCD low energy theorem, we propose a direct formula for calculating the bulk viscosity of QCD at finite chemical potential and z…
The Wigner solution of quark gap equation at nonzero current quark mass and partial restoration of chiral symmetry at finite chemical potential
Yu Jiang, Hao Gong, Wei-min Sun +1
According to the generally accepted phase diagram of QCD, at low temperature and high baryon number density the chiral phase transition of QCD is of first order and the co-existenc…
Supercurrent in p-wave Holographic Superconductor
Hua-Bi Zeng, Wei-Min Sun, Hong-Shi Zong
The p-wave and -wave holographic superconductors with fixed DC supercurrent are studied by introducing a non-vanishing vector potential. We find that close to the critical te…
Effect of gauge boson mass on the phase structure of QED
Jian-Feng Li, Yu-Qing Zhou, Hong-Tao Feng +2
Dynamical chiral symmetry breaking (DCSB) in QED with finite gauge boson mass is studied in the framework of the rainbow approximation of Dyson-Schwinger equations. By adopti…
The Equation of State and Quark Number Susceptibility in Hard-Dense-Loop Approximation
Yu Jiang, Hua Li, Shi-song Huang +2
Based on the method proposed in [ H. S. Zong, W. M. Sun, Phys. Rev. \textbf{D 78}, 054001 (2008)], we calculate the equation of state (EOS) of QCD at zero temperature and finite qu…
Calculation of tensor susceptibility beyond rainbow-ladder approximation of Dyson-Schwinger equations approach
Yuan-mei Shi, Hui-xia Zhu, Wei-min Sun +1
In this paper, we extend the calculation of tensor vacuum susceptibility in the rainbow-ladder approximation of the Dyson-Schwinger (DS) approach in [Y.M.Shi, K.P.Wu, W.M.Sun, H.S.…
The Quark Number Susceptibility in Hard-Thermal-Loop Approximation
Yu Jiang, Hui-xia Zhu, Wei-min Sun +1
With the aid of the vector Ward-Takahashi identity we derive a general formula for the quark number susceptibility (QNS) which expresses the QNS as an integral expression only invo…
Gauge invariant hydrogen atom Hamiltonian
Wei-Min Sun, Xiang-Song Chen, Xiao-Fu Lu +1
For quantum mechanics of a charged particle in a classical external electromagnetic field, there is an apparent puzzle that the matrix element of the canonical momentum and Hamilto…
Vacuum pseudoscalar susceptibility
Lei Chang, Yu-Xin Liu, Craig D. Roberts +3
We derive a novel model-independent result for the pion susceptibility in QCD via the isovector-pseudoscalar vacuum polarisation. In the neighbourhood of the chiral-limit, the pion…
Crossover from a continuum study of chiral susceptibility
Min He, Fei Hu, Wei-Min Sun +1
We derive a model-independent integral formula for chiral susceptibility and attempt to present a continuum model study of it within the framework of Dyson-Schwinger Equations. An…
Chiral susceptibility and the scalar Ward identity
Lei Chang, Yu-xin Liu, Craig D. Roberts +3
The chiral susceptibility is given by the scalar vacuum polarisation at zero total momentum. This follows directly from the expression for the vacuum quark condensate so long as a…
Quark number susceptibility around the critical end point
Min He, Jian-Feng Li, Wei-Min Sun +1
The quark number susceptibility is expressed as an integral in terms of dressed quark propagator and dressed vector vertex. It is then investigated with the latter two- and three-p…