论文标题
驱动性KERR谐振器中损失和非线性的联合量子估计
Joint quantum estimation of loss and nonlinearity in driven-dissipative Kerr resonators
论文作者
论文摘要
我们解决了在损失存在下相干驱动的非线性KERR谐振器的多参数量子估计。特别是，我们考虑了感兴趣的参数是损耗率和非线性耦合的现实情况，而相干驾驶的幅度是已知的，并且可以外部调节。我们的结果表明，这种驱动的模型在渐近上是经典的，即Uhlmann曲率消失，并且可以共同估计这两个参数，而没有任何额外的量子噪声。我们还发现，由量子渔民信息（QFI）量化的最终与精度结合在一起，随着相互作用时间和两个参数的驱动幅度的增加。最后，我们研究了正交检测的性能，并表明，对于这两个参数，Fisher信息及时振荡，反复接近相应的QFI。
We address multiparameter quantum estimation for coherently driven nonlinear Kerr resonators in the presence of loss. In particular, we consider the realistic situation in which the parameters of interest are the loss rate and the nonlinear coupling, whereas the amplitude of the coherent driving is known and externally tunable. Our results show that this driven-dissipative model is asymptotically classical, i.e. the Uhlmann curvature vanishes, and the two parameters may be jointly estimated without any additional noise of quantum origin. We also find that the ultimate bound to precision, as quantified by the quantum Fisher information (QFI), increases with the interaction time and the driving amplitude for both parameters. Finally, we investigate the performance of quadrature detection, and show that for both parameters the Fisher information oscillates in time, repeatedly approaching the corresponding QFI.
