论文标题
通过超导宇宙弦的引力波排放
Emission of gravitational waves by superconducting cosmic strings
论文作者
论文摘要
我们研究超导宇宙字符串的重力辐射发射效率$γ$。我们通过使用可解决的跨音符字符串模型来证明，电流的存在会导致抑制尖端，扭结和不同类型的环路的重力发射。我们还表明，当存在电流时，随着谐波模式的增加，用尖齿的环的发射光谱被指数抑制，因此与当前无回路的功率法谱显着不同。此外，我们在$γ$和电流对宇宙字符串的价值之间建立了现象学关系。我们猜想这种关系对于任意类型的电流携带字符串应该有效。我们使用此结果来研究电流对具有额外自由度的宇宙弦产生的随机引力波背景的潜在影响，并表明光谱的幅度和形状都可能受到显着影响。
We study the gravitational radiation emission efficiency $Γ$ of superconducting cosmic strings. We demonstrate, by using a solvable model of transonic strings, that the presence of a current leads to a suppression of the gravitational emission of cusps, kinks and different types of loops. We also show that, when a current is present, the spectrum of emission of loops with cusps is exponentially suppressed as the harmonic mode increases, thus being significantly different from the power law spectrum of currentless loops. Furthermore, we establish a phenomenological relationship between $Γ$ and the value of the current on cosmic strings. We conjecture that this relation should be valid for an arbitrary type of current-carrying string. We use this result to study the potential impact of current on the stochastic gravitational wave background generated by cosmic strings with additional degrees of freedom and show that both the amplitude and shape of the spectrum may be significantly affected.
