1. Quantum mechanics II Winter 2012
Physics 452
Quantum mechanics II
Winter 2012
Karine Chesnel

2. Prepare for exams, by reviewing lectures and homework
Phys 452
Test 1
Problem 1 14 / 20
Problem 2 18 / 20
Problem / 20
Problem / 20
Problem / 20
Class average
76.5 / 100
Highest score
94/100
Prepare for exams, by reviewing lectures and homework
(not only sample exam)

3. Homework Phys 452 Wednesday Feb 22: assignment # 11
8.1, 8.2, 8.7, 8.14
Friday Feb 24: assignment # 12
8.3, 8.4, 8.16

4. Techniques to find approximate solutions to the Schrodinger equation
Phys 452
Techniques to find approximate solutions to the Schrodinger equation
The perturbation theory
2. The variational principle
3. The WKB approximation

5. To which situation the WKB approximation does apply?
Phys 452
Quiz 16a
To which situation the WKB approximation does apply?
To solve 3D time-dependent Schrödinger equation
To solve 3D time-independent Schrödinger equation
To solve 1D time-dependent Schrödinger equation
To solve 1D time-independent Schrödinger equation
when the particle is free

6. The WKB approximation Wentzel- Kramers - Brillouin
Phys 452
The WKB approximation Wentzel- Kramers - Brillouin
Gregor
Wentzel
German
Leon Brillouin
French
Hendrik Kramers
Dutch

7. The WKB approximation Phys 452
The WKB approximation is based on the idea that
for any given potential, the particle can be locally
seen as a free particle with a sinusoidal wave function,
but whose wavelength varies very slowly in space.