摘要：The Paradox is based on two things, first is locality, second is reality. The scenario is as follows. Suppose Alice and Bob have a pair of entangled s 阅读全文

摘要：从Pauli算符看SU(2)与SO(3) 如果$U\in SU\left( 2 \right) $,对于任意一个$2x2$零迹厄密矩阵$\sigma=\left( \begin{matrix} z& x-iy\ x+iy& -z\ \end{matrix} \right)$，都有$U\sigma U 阅读全文

摘要：Hamiltonian in the interaction picture $$ i\partial |\psi \rangle =H|\psi \rangle ,e^{iH_0t}|\psi \rangle =|\phi \rangle \ i\partial \left( e^{-iH_0t} 阅读全文

摘要：Quoted from StackExchange. Suppose we have two events \((x_1,y_1,z_1,t_1)\) and \((x_2,y_2,z_2,t_2)\). Then we can define \(\Delta s^2 = -(c\Delta t)^ 阅读全文