Wave-packets with opposite momenta.

  • Thread starter alemsalem
  • Start date
  • #1
174
5

Main Question or Discussion Point

Is it possible to prepare a particle with a wave-packet having momenta in opposite directions,
so that you have two localized packets moving away from each other (for a single particle)?
 

Answers and Replies

  • #2
1,006
105
Sure. Send a particle at a potential barrier with a height and width such that the particle has some probability to tunnel through, and some probability to be reflected. After encountering the barrier, a portion of the particle's wave function will be on the other side of the barrier travelling in the original direction, while a different portion will be moving away from the barrier opposite the original direction of motion, having been reflected.
 
  • #3
is phase velocity of electron in microwave sense is greater than speed of light?
 
  • #4
please solve my problem....
is phase velocity of electron is greater than speed of light.?
 
  • #5
i think its very complicated things..
 
  • #6
174
5
its not higher than the speed of light, I think its half the particle's velocity (group velocity)

Vphase = (h*omega)/(h k) = (p^2/2m)/p = p/2m = v/2 roughly speaking..
 

Related Threads on Wave-packets with opposite momenta.

  • Last Post
Replies
1
Views
689
  • Last Post
Replies
1
Views
2K
Replies
11
Views
2K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
6
Views
837
  • Last Post
Replies
3
Views
5K
  • Last Post
Replies
3
Views
3K
Top