An algorithm for quantum-state estimation based on the maximum-likelihood estimation is proposed. Existing techniques for state reconstruction based on the inversion of measured data are shown to be overestimated since they do not guarantee the positive definiteness of the reconstructed density matrix.关...
We study informationally overcomplete measurements for quantum state estimation so as to clarify their tomographic significance as compared with minimal informationally complete measurements. We show that informationally overcomplete measurements can improve the tomographic efficiency significantly over minimal measure...
The physical origin for the FDP state estimation approach, encapsulated in the functional of equation (3), can be understood by examining the Born rule, equation (1), applied to the probe states and estimated state. Minimization of the functional in equation (3) aims to reduce the difference...
一个有趣的例子是distributed sensing， 直观的理解是将squeezed state用beamsplitter 分发到各测量样本上...
当当书之源外文图书在线销售正版《预订 高被引Introduction to Quantum-State Estimation [ISBN:9789814678834]》。最新《预订 高被引Introduction to Quantum-State Estimation [ISBN:9789814678834]》简介、书评、试读、价格、图片等相关信息,尽在DangDang.com,网购《预
具体实现的系统大部分还是依靠near Gaussian state来做的，比如说squeezing及其变种（比如用time reversal来...
The determination of ground state energy of complex physical systems25 and the post-processing of quantum tomographic data via maximum-likelihood estimation26,27,28 are difficult optimization problems due the large number of variables involved. Since CSPSA requires two evaluations of the target function...
An efficient state estimation model, neural network estimation (NNE), empowered by machine learning techniques, is presented for full quantum state tomography (FQST). A parameterized function based on neural network is applied to map the measurement outcomes to the estimated quantum states. Parameters...
统计学上对付参数估计问题最常用的方法就是极大似然估计(Maximum Likelihood Estimation,MLE)。它的思想很简单,就是在众多参数中找到这样一个参数,使得在该参数的前提下,测量到已有结果的概率是最大的。 具体步骤也很简单: 极大似然估计:设似然函数(likelihood function) f(\theta; \mathbf{x}) = p(\mathbf{x...
J. Entanglement-free Heisenberg-limited phase estimation. Nature 450, 393–396 (2007). Article ADS Google Scholar Gao, W.-B. et al. Experimental demonstration of a hyper-entangled ten-qubit Schrödinger cat state. Nat. Phys. 6, 331–335 (2010). Article Google Scholar Bell, B. et ...