论文标题
飞行等离子体镜的轨迹横穿密度梯度的目标
Trajectory of a flying plasma mirror traversing a target with density gradient
论文作者
论文摘要
已经提出，如果血浆具有适当的量身定制的密度剖面，激光引起的相对论等离子体镜可以加速。这种加速的等离子体镜可以用作模拟黑洞，以研究霍金蒸发和相关的信息损失悖论。在这里，我们在分级密度等离子体中重新检查镜像运动的基本动力学，以提供显式轨迹作为等离子体密度及其梯度的函数。具体而言，沿激光传播方向的血浆密度曲线（下升压）通常会加速镜子。特别是，恒定指数的密度曲线将产生戴维斯的满足轨迹，并具有明确定义的模拟鹰温度，该温度对等离子体密度梯度敏感，但对密度本身不敏感。我们表明，如果不调用纳米制造的薄膜，一个较低的密度气体目标，例如，$ \ sim 1 \ times 10^{17} {\ rm cm cm}^{ - 3} $，将能够诱导一个模拟霍金温度10^{ - 2} {\ rm ev} $，在远红外区域。我们希望这将有助于更好地实现Chen和Mourou提出的实验。
It has been proposed that laser-induced relativistic plasma mirror can accelerate if the plasma has a properly tailored density profile. Such accelerating plasma mirrors can serve as analog black holes to investigate Hawking evaporation and the associated information loss paradox. Here we reexamine the underlying dynamics of mirror motion in a graded-density plasma to provide an explicit trajectory as a function of the plasma density and its gradient. Specifically, a decreasing plasma density profile (down-ramp) along the direction of laser propagation would in general accelerate the mirror. In particular, a constant-plus-exponential density profile would generate the Davies-Fulling trajectory with a well-defined analog Hawking temperature, which is sensitive to the plasma density gradient but not to the density itself. We show that without invoking nano-fabricated thin-films, a much lower density gas target at, for example, $\sim 1\times 10^{17}{\rm cm}^{-3}$, would be able to induce an analog Hawking temperature, $k_{_B}T_{_H}\sim 6.6 \times 10^{-2}{\rm eV}$, in the far-infrared region. We hope that this would help to better realize the experiment proposed by Chen and Mourou.
