来自laser细丝中“相视界”的霍金辐射？
Hawking radiation from "phase horizons" in laser filaments?
摘要：
Albertorno等人报道了旨在利用激光灯丝探测霍金辐射（类似物）的实验[F. Lett. 105，203901（2010）]。他们将强烈聚焦的贝塞尔脉冲发送到非线性电介质中，以便通过克尔效应改变其折射率，并看到与脉冲传播方向正交的光子的产生。由于脉冲中折射率的变化产生了一个“相视界”（这些光子的相速度等于脉冲速度），他们得出结论，他们观察到了霍金辐射的类似物。我们在一个相视界和相速度与他们的实验非常相似的模型中研究了这种情况，发现有效度规并不完全对应于黑洞。在这个模型中产生的光子不是由于黑洞蒸发的模拟，而是与宇宙粒子的产生有更多的相似之处。然而，即使是这种效应也不能解释观测结果--除非脉冲在纵向和横向维度上都有显著的小尺度结构。
英文摘要：
Belgiorno et al have reported on experiments aiming at the detection of (the analogue of) Hawking radiation using laser filaments [F. Belgiorno et al, Phys. Rev. Lett. 105, 203901 (2010)]. They sent intense focused Bessel pulses into a non-linear dielectric medium in order to change its refractive index via the Kerr effect and saw creation of photons orthogonal to the direction of travel of the pluses. Since the refractive index change in the pulse generated a "phase horizon" (where the phase velocity of these photons equals the pulse speed), they concluded that they observed the analogue of Hawking radiation. We study this scenario in a model with a phase horizon and a phase velocity very similar to that of their experiment and find that the effective metric does not quite correspond to a black hole. The photons created in this model are not due to the analogue of black hole evaporation but have more similarities to cosmological particle creation. Nevertheless, even this effect cannot explain the observations -- unless the pulse has significant small scale structure in both the longitudinal and transverse dimensions.
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。
