论文标题
一般FRW的旋转场的应力能量张量的波动
Fluctuations in the stress energy tensor of spinor fields evolving in general FRW spacetimes
论文作者
论文摘要
在这项工作中，我们研究了旋转磁场的应力能量张量中的量子波动，通常在FRW的空间中演变。我们通过旋转磁场的噪声核来量化这些波动。对于De Sitter时空的特殊情况，我们将旋转磁场放在所谓的费米子束戴维斯真空中，并研究噪声内核的变化。然后，我们利用无质量旋转型场的保形不变性，并采用了等效性，该等效性将无质体旋转器与任何给定的FRW时空中的无质体场与DE Sitter SpaceTime中的相应无质体旋转磁场联系起来。使用这种等效性，我们研究了一般的FRW空位中无质旋转场的噪声核的行为，同时将田地放在de Sitter SpaceTime的相应无质体旋转球场的束davies真空中。我们将此分析扩展到坐标的能量能量相关器的坐标数量。我们比较了在考虑的空间中对旋转场的这些结果与标量场的类似结果。这项研究有助于我们更好地了解自旋1/2效率物质是否在考虑的空间中是否保持密切相关，从而导致相当大的反应。
In this work, we study quantum fluctuations in the stress energy tensor of spinor fields evolving in general FRW spacetimes. We quantify these fluctuations by the noise kernel of spinor fields. For the particular case of de Sitter spacetime, we place the spinor field in what is called the fermionic Bunch Davies vacuum and study the variation of the noise kernel with the mass of the field. We then make use of the conformal invariance of massless spinor fields and employ an equivalence that relates a massless spinor field in any given FRW spacetime with a corresponding massless spinor field in de Sitter spacetime. Using this equivalence, we study the behaviour of the noise kernel of massless spinor fields in general FRW spacetimes while placing the fields in the Bunch Davies vacuum of the corresponding massless spinor field of the de Sitter spacetime. We extend this analysis to the coordinate invariant quantity of the energy energy correlator. We compare these results for spinor fields in considered spacetimes with the analogous results for scalar fields. This study helps us better understand whether the spin 1/2 fermionic matter remains strongly correlated in considered spacetimes leading to considerable backreaction or not.
