# I Solving a quantum harmonic oscillator using quasi momentum

#### Prathyush

In the paper below I've seen a new method to solve the quantum harmonic oscillator
Introduction to the Spectrum of N=4 SYM and the Quantum Spectral Curve

It is done using the concept of quasi momentum defined as
$$p = - i \frac{d(\log \psi)}{dx}$$
See pg 7,8

Is this well know? is it discussed somewhere in detail?

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