# Bound vs not bound states

1. Dec 18, 2012

### prehisto

Bound vs "not"bound states

1. The problem statement, all variables and given/known data
Hi, I do not understand how two bound state wavefunctions differ from not bound state
wavefunctions.
To be more precise I m thinking about the graphical representation.

ons[/b2. Relevant equati

3. The attempt at a solution
I speculate that bound states can overlap or get close to each other.
Perhaps the problem is in meaning of "bound" in this particuular case?
Could someone help me to understand this better?

2. Dec 18, 2012

### andrien

Re: Bound vs "not"bound states

bound state wave functions are given by something like e(-kr)/r in comparison to non bound states for which WAVE FUNCTION at large distances are like Sle(ikr)/r+e(-ikr)/r where that Sl corresponds to scattering amplitude.You can see easily that bound state is just the pole for a replacement of K-->iK in scattering one because there is no incoming wave there.