Subpicosecond coincidence timing from nonlocal intensity interference of entangled photons allows quantum interferometry for plasmas. Using a warm plasma dispersion relation, we correlate phase measurement sensitivity with different plasma properties or physics mechanisms over six orders of magnitude. Due to $N^{\alpha }$ ($\alpha \le -1/2$) scaling with the photon number N, quantum interferometry using entangled light can probe small signals in plasmas not previously accessible. As an example, it is predicted that plasmas will induce shifts to a Gaussian dip, a well-known quantum optics phenomenon that is yet to be demonstrated for plasmas.

中文翻译：

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等离子体的纠缠光子干涉测量法

来自纠缠光子的非局域强度干涉的亚皮秒重合时间允许等离子体的量子干涉测量。使用暖等离子体色散关系，我们将相位测量灵敏度与超过六个数量级的不同等离子体特性或物理机制相关联。由于$N^{\alpha }$ ($\alpha \le -1/2$) 与光子数N 成比例，使用纠缠光的量子干涉测量可以探测以前无法获得的等离子体中的小信号。例如，据预测，等离子体将引起向高斯倾角的转变，这是一种众所周知的量子光学现象，尚未在等离子体中得到证明。