Hefei Research Institute made progress in the study of 3D quantum electrodynamics

Three-dimensional quantum electrodynamics (QED3) is an effective model for a variety of strongly correlated systems in condensed matter physics, such as under-doped copper oxide high-temperature superconductors, and spins of 1/2 Kagome spin liquids. Theoretical studies based on the QED3 model show that at zero temperature, Dirac fermions will spontaneously gain mass under the action of the gauge field. This self-generated Dirac fermion mass corresponds to antiferromagnetic sequences in copper oxide superconductors. Formation. However, at finite temperatures, the self-generated mass cannot be restored to zero temperatures. Therefore, the generation of fermion masses at finite temperatures is a difficult problem in the current theoretical research of related electronic systems.

Dr. Wang Jingrong of Zhang Changjin Research Group of the Strong Magnetic Field Science Center of the Chinese Academy of Sciences and the team of Liu Guozhu of the University of Science and Technology of China, proposed a new approximate scheme to study the Fermions in the QED3 model at finite temperature using the Dyson-Schwinger equation. The spontaneous production of quality. Under this approximate scheme, the lateral component of the gauge field propagator is included. To a certain extent, the dependency of the gauge field propagator on energy is considered, and the infrared divergence is also removed. At the same time, the numerical calculation difficulty is not increased by an order of magnitude. . The self-generated mass obtained under this approximation scheme can qualitatively restore the characteristics of the results at zero temperature and quantitatively approach results at zero temperatures.

This work was published in Physical Review D. Reviewers believe that the object of this work study is a challenging and extremely important system in the field of particle physics and condensed matter physics. This paper has made outstanding contributions in related fields.

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