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arXiv 1108.4428hep-phcond-mat.supr-conhep-thnucl-th
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有限温度和外磁场中带电标量场的优化微扰理论

Optimized perturbation theory for charged scalar fields at finite temperature and in an external magnetic field

D. C. Duarte, R. L. S. Farias, Rudnei O. Ramos

摘要:

研究了在有限温度和外加磁场存在下,自相互作用带电标量场理论中的对称性恢复问题。的有效潜力进行评估非微扰优化微扰理论方法的背景下。它明确地表明,在所有范围内的磁场,从弱到大的领域,相变是二阶和临界温度的增加与磁场。此外,我们提出了一种有效的方法来处理的总和超过朗道能级,这是感兴趣的,特别是在工作的情况下,与弱磁场。

英文摘要:

Symmetry restoration in a theory of a self-interacting charged scalar field at finite temperature and in the presence of an external magnetic field is examined. The effective potential is evaluated nonperturbatively in the context of the optimized perturbation theory method. It is explicitly shown that in all ranges of the magnetic field, from weak to large fields, the phase transition is second order and that the critical temperature increases with the magnetic field. In addition, we present an efficient way to deal with the sum over the Landau levels, which is of interest especially in the case of working with weak magnetic fields.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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