Is energy contained in matter wave equals hv like EM waves?

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SUMMARY

The discussion centers on the relationship between energy in matter waves and the equation E = hv, where h represents Planck's constant and v denotes frequency. The user encounters difficulties while deriving the Time-Dependent Schrödinger Equation (TDSE) due to the ambiguity in using either the single or double derivative of the wave function psi = e^(i(kx - wt)). Both approaches yield k^2 but lead to different equations, prompting questions about the validity of their energy assumptions. The need for clear assumptions in the derivation process is emphasized, particularly regarding linearity.

PREREQUISITES
  • Understanding of Planck's constant (h) and its role in quantum mechanics.
  • Familiarity with wave functions, specifically psi = e^(i(kx - wt)).
  • Knowledge of derivatives in the context of quantum mechanics.
  • Basic principles of the Time-Dependent Schrödinger Equation (TDSE).
NEXT STEPS
  • Study the derivation of the Time-Dependent Schrödinger Equation (TDSE) in detail.
  • Explore the implications of linearity in quantum wave functions.
  • Investigate the role of derivatives in quantum mechanics, focusing on single vs. double derivatives.
  • Learn about the physical significance of k^2 in wave mechanics.
USEFUL FOR

Students of quantum mechanics, physicists working with wave functions, and anyone interested in the mathematical foundations of the Time-Dependent Schrödinger Equation.

Jaden159
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h is plank constant and v is frequency.
I was using this to derive the TDSE. But I ran into problem because to substitute k^2 in E=h^2/8mpi^2 * k^2, I can use single derivative of psi squared or double derivative, both of which tend to give the correct answer. So, is my assumption of energy wrong?

PS
I am using psi = e^i(kx-wt) as my wave function. Single derivative squared or double derivative both have k^2.
Substituting this gives two different equations.
 
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Jaden159 said:
I was using this to derive the TDSE.

Starting with what assumptions? Just saying "h is Planck's constant and v is frequency" isn't enough by itself.
 
Single derivative squared is not linear, whereas linearity is probably an assumption you want (though as PeterDonis said, you haven't stated what assumptions you want to start with fully).
 

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