Degree of coherence
Abstract from wikipedia
In quantum optics, correlation functions are used to characterize the statistical and coherence properties of an electromagn
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The change of probability
Two photons income a 50:50 beam splitter from a and b respectly. There are four results. . If the two photons are identical in their physical propert
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Hong–Ou–Mandel effect
Abstract from wikipedia
The effect occurs when two identical single-photon waves enter a 1:1 beam splitter, one in each input port. When the photons
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Bell State and GHZ State
What is Bell states?The Bell states are four specific maximally entangled quantum states of two qubits.\begin{equation}\begin{aligned}\vert \Psi^\pm \
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Start of Quantum Communication
I decide to write this to record someting important or interesting in my experience about quantum communication.The followings are a list of some pape
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液体沸腾条件
$$(p_{v_0}+p_g)-p=\Delta p$$
$$p_g=\frac{\nu RT}{V}, \Delta p=\frac{2 \alpha}{r}$$
$$r=\left( \frac{3}{4 \pi}V \right)^\frac{1}{3}$$
$$A=2 \alpha \left(\frac{4 \pi}{3}\right)^\frac{1}{3},B=\nu RT$$
最终化为
$$p+\frac{A}{V^\frac{1}{3}}=p_0+\frac{B}{V}$$
梯度，散度，旋度
设$\vec{v},\vec{\omega}$散度和旋度均相等，问：在什么条件下，$\vec{v}=\vec{\omega}$问题等价于当$$\nabla\times\vec{v}=0,\nabla\cdot\vec{v}=0$$什么条件下$\vec{v}=0$?设$\Omega\subset\ma
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OpenFoam 模型的注释
incompressible 不可压缩流体pimpleFoamLES大涡模拟是对紊流脉动（或紊流涡）的一种空间平均，也就是通过某种滤波函数将大尺度的涡和小尺度的涡分离开，大尺度的涡直接模拟，小尺度的涡用模型来封闭。大涡模拟成立的理论基础是在高雷诺数紊流中存在惯性子尺度的涡，该尺度的涡具有统计意义上的
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Analysis quiz
1. 设$v(n)$ 是$n$ 维球体$\lbrace x^2_1 +\cdots +x_n^2\leqslant 1\rbrace$ 的体积，求$v(n)$ 的最大值$$B_n(a)=\lbrace (x_1,\cdots ,x_n):x^2_1 +\cdots +x_n^2\leqslant
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Note on Tobias Holzmann's Tesla's One-Way-Valve tutorial
Two weeks ago, I found Tobias Holzmann’s Tesla’s One-Way-Valve. It is great but there is no explaination. So, I write this page to record some trouble
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