QM: Calculate Transmission Coefficient

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SUMMARY

The discussion focuses on calculating the transmission coefficient for a potential step defined by V(x) = -V for x > 0 and V(x) = 0 for x ≤ 0, where V is a positive constant. The transmission coefficient is identified as the probability of transmission, which is influenced by the velocity of the transmitted wave. Participants suggest using wave functions for a free particle in both regions and applying boundary conditions at x = 0 to derive the transmission coefficient accurately.

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  • Quantum mechanics fundamentals
  • Understanding of wave functions
  • Knowledge of boundary conditions in quantum systems
  • Familiarity with the concept of transmission coefficients
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  • Study the derivation of wave functions for free particles in quantum mechanics
  • Learn about boundary conditions and their application in quantum mechanics
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Students and professionals in quantum mechanics, physicists working with potential barriers, and anyone interested in the mathematical modeling of wave phenomena in quantum systems.

JuHanKim
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Homework Statement



V(x) = -V ( if x > 0 )
0 ( if x <= 0)
( V is positive constant)

the transmission coefficient is not simply F2 / A2 ( with A the incident amplitude and F the transmitted amplitude ), because the transmitted wave travels at a different speed.

Calculate transmission coefficient.

Q. I know transmission coefficient is probability of transmission. then I wonder why transmission coefficient has relevance to velocity??
 
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Hello again! Please use the template, don't erase it. That's a no-no in PF !

Under 2. you could write a few wave functions for a free particle in the two regions and then in 3. look at the boundary conditions at x = 0.

Or google...
 

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