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arXiv 1811.00575hep-th
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膨胀时空中的相互作用费米子

Interacting fermions in an expanding spacetime

L. N. Machado, H. A. S. Costa, I. G. da Paz, M. Sampaio, Jonas B. Araujo

摘要:

我们评估了量子电动力学对狄拉克场模式之间的相关性的影响,相应的电子-正电子对的相反的动量产生的渐近平坦的Friedmann-Robertson-Walker(FRW)宇宙的膨胀。计算了出射电子-正电子对的互信息在耦合强度上的领先级,并与自由情况进行了比较。结果表明,电子和正电子之间的互信息减少。此外,还发现正负电子互信息的变化取决于动量在正电子模和光子模之间的分布。

英文摘要:

We evaluate the effect of quantum electrodynamics on the correlations between Dirac field modes corresponding electron-positron pairs of opposite momenta generated by expansion of an asymptotically flat Friedmann-Robertson-Walker (FRW) universe. The mutual information of out-going electron-positron pairs is evaluated to leading order in the coupling strength and compared with the free case. It is shown a decrease in the mutual information between the electron and positron. In addition, it is found that the change in the electron-positron mutual information depends on how the momentum is distributed between the positron and photon modes.

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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