论文标题
量子计量学具有非线性踢马赫德尔干涉仪
Quantum metrology with a non-linear kicked Mach-Zehnder interferometer
论文作者
论文摘要
我们研究了除相位变速杆非线性元件外，还包含手学的干涉仪的灵敏度。通过将两个元素包括在一个腔或循环中多次横断的循环中，就会出现非线性踢式版本。我们研究了它的敏感性，作为相移的功能，踢脚强度，最大达到平均光子数量以及由于初始相干状态的光子损失而导致的阻尼。我们发现，如果挤压占主导地位的总光子数，则会出现敏感性的Heisenberg限制缩放。对于小到适中的阻尼率，非线性踢球可以大大提高通过单位时间量子渔民信息来衡量的灵敏度。
We study the sensitivity of a Mach-Zehnder interferometer that contains in addition to the phase shifter a non-linear element. By including both elements in a cavity or a loop that the light transverses many times, a non-linear kicked version of the interferometer arises. We study its sensitivity as function of the phase shift, the kicking strength, the maximally reached average number of photons, and damping due to photon loss for an initial coherent state. We find that for vanishing damping Heisenberg-limited scaling of the sensitivity arises if squeezing dominates the total photon number. For small to moderate damping rates the non-linear kicks can considerably increase the sensitivity as measured by the quantum Fisher information per unit time.
