6.2 The Potential Barrier er Tunneling - Physics and Astronomy
Transcript of 6.2 The Potential Barrier er Tunneling - Physics and Astronomy
PHYS-2402
Mar. 24, 2015
Lecture 16
Announcement
Course webpage
http://highenergy.phys.ttu.edu/~slee/2402/
Textbook
HW5 (due 3/31)
15, 18, 24, 28, 36
Midterm Exam Grade:
Class average: ~ 54% Quiz 2 (4/9)
6.2 The Potential Barrier &
Tunneling
• Tunneling is one of the most important & startling" ideas in QM. "
• The simplest solution is a potential barrier, a PE " jumps that is only temporary."
• If a particle’s E < Barrier’s height. " it should not get through - classically"
Potential Barrier
R(L)
T(L)
(!)
Resonant Transmission
Is there any “L” that would give
T = 1, R = 0
? Like i
n OPTIC
S
Resonant Transmission
Is there any “L” that would give
T = 1, R = 0
? Like i
n OPTIC
S
= 0
Resonant Transmission
T = 1, R = 0
for:
Barrier Penetration – “Tunneling”
Barrier Penetration – “Tunneling” Barrier Penetration – “Tunneling”