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Quantum harmonic oscillator

Index Physics Subfields of physics Quantum mechanics Quantum models
 1 By others on same topic  0 Discussions  1970-01-01  See my version

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Quantum harmonic oscillator by Ciro Santilli 37  Updated 2025-05-29  +Created 1970-01-01
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This equation is a subcase of Equation "Schrödinger equation for a one dimensional particle" with V(x)=x2.
We get the time-independent Schrödinger equation by substituting this V into Equation "time-independent Schrödinger equation for a one dimensional particle":
[−2mℏ​∂x∂2​+x2]ψ=Eψ(x)
(1)
Now, there are two ways to go about this.
The first is the stupid "here's a guess" + "hey this family of solutions forms a complete basis"! This is exactly how we solved the problem at Section "Solving partial differential equations with the Fourier series", except that now the complete basis are the Hermite functions.
The second is the much celebrated ladder operator method.
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