Critical Behavior of Plasmon Damping Rate in Thermal Scalar Field

ZHANG Han-Zhong; WANG En-Ke

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《中国物理C》（英文）编辑部

2024年10月30日

Chinese Physics C> 2002, Vol. 26> Issue(5) : 522-529

Critical Behavior of Plasmon Damping Rate in Thermal Scalar Field

ZHANG Han-Zhong ^, ,
WANG En-Ke

Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China

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Abstract：
Thermal Renormalization Group equations are derived in the framework of Closed-Time-Path formalism in real-time temperature field theory. The numerical solutions of the Thermal Renormalization Group equations show that the coupling constant runs with temperature. Applying Thermal Renormalization Group equations to φ⁴ theory with spontaneously breaking symmetry, we investigate the critical behavior of the damping rate of the plasmon with finite momentum at the phase transition temperature of restoring symmetry. As the critical point is approached, it turns out that for the plasmon with finite momentum the damping rate decrease to zero. The tendence is opposite to that obtained by taking the no-runing coupling constant. The result is consistent with critical slowing down law.

References

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ZHANG Han-Zhong and WANG En-Ke. Critical Behavior of Plasmon Damping Rate in Thermal Scalar Field[J]. Chinese Physics C, 2002, 26(5): 522-529.

ZHANG Han-Zhong and WANG En-Ke. Critical Behavior of Plasmon Damping Rate in Thermal Scalar Field[J]. Chinese Physics C, 2002, 26(5): 522-529. shu

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Received: 2001-06-17
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Critical Behavior of Plasmon Damping Rate in Thermal Scalar Field

ZHANG Han-Zhong ^,
WANG En-Ke

Corresponding author: ZHANG Han-Zhong,

Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China

Received Date: 2001-06-17
Accepted Date: 1900-01-01
Available Online: 2002-05-05

Abstract: Thermal Renormalization Group equations are derived in the framework of Closed-Time-Path formalism in real-time temperature field theory. The numerical solutions of the Thermal Renormalization Group equations show that the coupling constant runs with temperature. Applying Thermal Renormalization Group equations to φ⁴ theory with spontaneously breaking symmetry, we investigate the critical behavior of the damping rate of the plasmon with finite momentum at the phase transition temperature of restoring symmetry. As the critical point is approached, it turns out that for the plasmon with finite momentum the damping rate decrease to zero. The tendence is opposite to that obtained by taking the no-runing coupling constant. The result is consistent with critical slowing down law.