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arXiv 0907.4139hep-thgr-qc
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高维宇宙弦时空中磁通量诱导的费米子电流密度

Induced fermionic current densities by magnetic flux in higher dimensional cosmic string spacetime

E. R. Bezerra de Mello

摘要:

本文分析了$2\leq d\leq 5$在$(1+d)-$维体中,由宇宙弦产生的沿锥形空间核运行的磁通量引起的量子费米子电流密度$<j^A(x)>$的真空涨落。为了发展这项研究,我们构造了一个表达式的费米传播子,它可以适用于这些不同的时空维度。两个具体的分析感应电流密度:$(i)$的无质量的领域在三维和四维,和$(ii)$的大规模的领域在所有维度考虑。在后者中,考虑了将宇宙弦的存在和磁通量与量子之比的分数部分编入法典的参数的具体值。虽然这是一种非常特殊的情况,有些不自然,但在这种情况下对感生费米子电流密度的相应分析可能会揭示这些量在更一般情况下的定性行为。

英文摘要:

In this paper we analyse the vacuum fluctuations of quantum fermionic current densities, $<j^A(x)>$, induced by a magnetic flux running along the core of the conical space produced by the presence of cosmic string, in a $(1+d)-$dimensional bulk, for $2\leq d\leq 5$. In order to develop this investigation we construct an expression for the fermionic propagator, which can be applied for those different dimensions of the spacetime. Two specific analysis for the induced current densities are presented: $(i)$ for massless fields in three and four dimensions, and $(ii)$ for massive fields in all dimensions considered. In the latter specific values for the parameters which codify the presence of the cosmic string and the fractional part of the ratio of the magnetic flux by the quantum one are considered. Although being a very special situation and somewhat unnatural, the corresponding analysis of induced fermionic current densities under this circumstance may shed light on the qualitative behavior of these quantities in a more general situation.

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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