arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1102.4894hep-thgr-qc
收藏

温度对厚膜和费米子(准)局域化的影响

Effects of temperature on thick branes and the fermion (quasi-)localization

Zhen-Hua Zhao, Yu-Xiao Liu, Yong-Qiang Wang, Hai-Tao Li

摘要:

继坎波斯的工作[物理。88,141602(2002)],我们研究了温度对平坦,de Sitter(dS)和反de的影响。\textbf{88},141602(2002)],我们研究了温度对5维(5D)弯曲时空中平坦、de Sitter(dS)和反de Sitter(AdS)厚膜以及费米子(准)局域化的影响。首先,在平坦膜的情况下,当临界温度达到时,背景标量场和翘曲因子的解不唯一。因此,在温度参数的临界值处,平坦厚膜的厚度是不确定的,该临界值被发现低于平坦5D时空中的临界值。费米子Kaluza-Klein(KK)模的质量谱是连续的,存在一系列费米子共振。共振态的数目和寿命都是有限的,并且随着温度参数的增加而增加,但共振态的质量随着温度参数的增加而减小。其次,在dS膜的情况下,我们没有找到这样的临界值的温度参数。费米子KK模的质量谱也是连续的,存在一系列费米子共振。温度对共振数、寿命和质量的影响与平膜的情况相同。最后,在AdS膜的情况下,{温度参数的临界值可以小于或大于平坦的5D时空中的温度参数的临界值。}费米子KK模的谱是离散的,费米子KK模的质量不随温度参数的增加而单调减小。

英文摘要:

Following Campos's work [Phys. Rev. Lett. 88, 141602 (2002)], we investigate the effects of temperature on flat, de Sitter (dS), and anti-de Following Campos's work [Phys. Rev. Lett. \textbf{88}, 141602 (2002)], we investigate the effects of temperature on flat, de Sitter (dS), and anti-de Sitter (AdS) thick branes in five-dimensional (5D) warped spacetime, and on the fermion (quasi-)localization. First, in the case of flat brane, when the critical temperature reaches, the solution of the background scalar field and the warp factor is not unique. So the thickness of the flat thick brane is uncertain at the critical value of the temperature parameter, which is found to be lower than the one in flat 5D spacetime. The mass spectra of the fermion Kaluza-Klein (KK) modes are continuous, and there is a series of fermion resonances. The number and lifetime of the resonances are finite and increase with the temperature parameter, but the mass of the resonances decreases with the temperature parameter. Second, in the case of dS brane, we do not find such a critical value of the temperature parameter. The mass spectra of the fermion KK modes are also continuous, and there is a series of fermion resonances. The effects of temperature on resonance number, lifetime, and mass are the same with the case of flat brane. Last, in the case of AdS brane, {the critical value of the temperature parameter can less or greater than the one in the flat 5D spacetime.} The spectra of fermion KK modes are discrete, and the mass of fermion KK modes does not decrease monotonically with increasing temperature parameter.

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。

↑