narip

摘要： Qubit rotation Using qubit rotation example to understand basic syntax of pennylane, gradient descent. See this link for more details. import pennylan 阅读全文

摘要： Werner state is all the quantum state commute with unitary group of form $U\otimes U$. We can write it with explicit matrix form by referring to Symme 阅读全文

摘要： 公式编号问题 参考 阅读全文

摘要： Refer to link. 阅读全文

摘要： See this link. 阅读全文

摘要： Classically mixed states. Refer to abstract of this paper. 阅读全文

摘要： May refer to this paper. Note that generally for an algebra we also know it should have representation and irrep. 阅读全文

摘要： Beam Splitter Useful links for beam splitter:https://en.wikipedia.org/wiki/Hong%E2%80%93Ou%E2%80%93Mandel_effect polarizing beam splitters(PBS) refer 阅读全文

摘要： We talk about attainability of classical FIM, in the asymptotic limit, FIM can always be attained:https://en.wikipedia.org/wiki/Maximum_likelihood_est 阅读全文

摘要： Also refer to wikipedia link, we have:${\displaystyle \mathbf {J} _{\mathbf {f} ^{-1}}={\mathbf {J} _{\mathbf {f} }}^{-1}.}$ 阅读全文