Finished the introduction.
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@@ -6,7 +6,13 @@
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% Add something that takes Planck to Schrödinger
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% In classical mechanics, we have Newton laws and conservation of energy. In quantum
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% mechanics, we have Schrödinger equation.
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The Schrödinger equation has a general form
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Erwin Schrödinger wanted to find a mathematical description of the wave characteristics
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of matter, supporting the wave-particle idea. He postulated a wave function which varies
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with position, where the function squared can be interpreted as the probability
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of finding an electron at a given position. This resulted in the Schrödinger equation,
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a wave eqution of the energy levels for a hydrogen atom. It also shows how a quantum
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state evolves with time \cite[p. 81]{wu:2023:quantum}. The Schrödinger equation
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has a general form
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\begin{align}
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i \hbar \frac{\partial}{\partial t} | \Psi \rangle &= \hat{H} | \Psi \rangle \ ,
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\label{eq:schrodinger_general}
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