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Late-Time Evolution of the Phantom scalar Perturbation in the Background of a Spherically Symmetric Static Black Hole

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Chinese Physics Letters 2010年第6期27卷 9-12页

作者： PAN Qi-Yuan JING Ji-Liang Institute of Physics and Department of Physics Hunan Normal University Changsha 410081

The late-time evolution of the phantom scalar perturbation is investigated in the spacetime of a four-dimensionai spherically symmetric static black hole. It is revealed that the asymptotic tail of the phantom scalar field is dominated by the growth behavior t-（l＋3/2）eμt, which depends on the multipole moment l and the field moss but is independent of the mass M and charge Q of the black hole. This growth behavior is in strong contrast to the decaying tall of the usual massive scalar perturbation and shows that the external phantom scalar perturbation is unstable in the spherically symmetric static black hole spacetime.

关键词： PHANTOMS (Radiology) scalar field theory PERTURBATION (Quantum dynamics) COSMIC background radiation SYMMETRY (Physics) SUPERMASSIVE black holes

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The scalar Photon Light-Cone Distribution Amplitude in the Instanton Vacuum Model of QCD

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Chinese Physics Letters 2014年第4期31卷 22-25页

作者： MO Xin LIU Jue-Ping Department of PhysiCs School of Physics Science and Technology Wuhan University Wuhan 430072

Based on the principle of the Lorentz covariance, the transition matrix elements from an off-shell photon state to the vacuum are parameterized by the light-cone photon distribution amplitudes （DAs）. Both the scalar off-shell photon light-cone DA and the corresponding coupling are calculated in the instanton vacuum model of quantum chromodynamics （QCD）, and their explicit analytical expressions and the numerical results are given. The results for the other chiral-odd light-cone photon DAs and their couplings are presented as well.

关键词： scalar field theory LIGHT cones AMPLITUDE estimation INSTANTONS QUANTUM chromodynamics ENANTIOSELECTIVE catalysis

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Time-Dependent Action in φ~6 Potential

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Communications in Theoretical Physics 2012年第7期58卷 19-26页

作者： Hatem Widyan Mashhoor Al-Wardat Department of Physics Al al-Bayt University Physics Department Yarmouk University

The false vacuum decay in field theory from a coherently oscillating initial state is studied for φ6 potential. An oscillating bubble solution is obtained. The instantaneous bubble nucleation rate is calculated.

关键词： phase transition tunneling scalar field theory

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Hermitian vs PT-Symmetric scalar Yukawa Model

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Journal of Modern Physics 2016年第9期7卷 899-907页

作者： Vladimir E. Rochev State Research Center of the Russian Federation “Institute for High Energy Physics” of National Research Centre “Kurchatov Institute” Protvino Russia

A comparative analysis of a model of complex scalar field φ and real scalar field χ with interaction for the real and purely imaginary values of coupling g in perturbative and non-perturbative regions is provided. In contrast to the usual Hermitian version (real g), which is asymptotically free and energetically unstable, the non-Hermitian PT-symmetric theory (imaginary g) is energetically stable and not asymptotically free. The non-perturbative approach based on Schwinger-Dyson equations reveals new interesting feature of the non-Hermitian model. While in the Hermitian version of theory the phion propagator has the non-physical non-isolated singularity in the Euclidean region of momenta, the non-Hermitian theory substantially free of this drawback, as the singularity moves in the pseudo-Euclidean region.

关键词： scalar field theory Non-Hermitian Lagrangians Schwinger-Dyson Equations Asymptotic Behavior

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