narip

摘要： If we use sample mean: \(\frac{\sum_i{\left( X_i-\bar{X} \right)}^2}{n}\), then we should use sample variance:\(\frac{\sum_i{\left( X_i-\bar{X} \right 阅读全文

摘要： Refer links 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： 实现简单的VQE。 导入包。 from random import random import numpy as np import qiskit from numpy import pi # importing Qiskit from qiskit import QuantumCircuit, e 阅读全文

摘要： Most easy reading material!!! 转载 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： Suppose \(p(x)\) is a polynomial of degree \(\leq n\) which is bounded in \([-1,+1]\) for \(x \in[-1,+1]\). What is the largest \(p^{\prime}(0)\) can 阅读全文

摘要： DOI: 10.1103/PhysRevA.105.023718 Eq.(48): \[ \left< \left( n_a-n_b \right) ^2 \right> -\left< \left( n_a-n_b \right) \right> ^2 \\ c\left( |\phi 0\ran 阅读全文

摘要： DOI: 10.1103/PhysRevLett.111.173601 Eq(17): \[ a_2=\frac{x+ip}{\sqrt{2}} \\ 2\bar{N}+1=2\left< {a_2}^{\dagger}a_2 \right> +1=2\left< \frac{x-ip}{\sqrt 阅读全文

摘要： State after Beam Splitter Refer to page 9 of [^1] $$ |1\rangle |0\rangle \ \left( \begin{matrix} \cos \frac{\phi}{2}& -\sin \frac{\phi}{2}\ \sin \frac 阅读全文