摘要：$$\left( U\otimes \bar{U} \right) |\omega \rangle =\left( U\otimes \bar{U} \right) \frac{1}{\sqrt{2}}\left( |00\rangle +|11\rangle \right) \ \langle 0 阅读全文

摘要：I will give an extended explanation of Nielsen's proof, i.e. your first ref link. The idea is that, $\rho=\sum_ip_i|i\rangle\langle i|$, we can prove 阅读全文