Department of Physics
Office: Disque 808
Office hours: Thursday 4:30-5:30pm
We are living in a quantum world. Get used to it.
Course Description and Philosophy
Textbook and Reading Assignments
Course rules of conduct
Welcome back to Drexel and welcome to the home page of QM III. This is your resource page for information about the course, including homework assignments, exams, and solutions. This web page is also the syllabus for the course. To save paper, I will not print and distribute copies of documents in class. You may read them on the web or your computer and print out if you need.
In the first two quarters of our three part sequence on QM, you studied the basic equations, discussed the similarities and differences between the classical and QM descriptions, and solved some simple, typically one-dimensional problems. In the second quarter you worked on QM in three dimensions, including description of the Hydrogen atom, from which you could first see how the QM formulation yields accurate predictions of the observed phenomena, and studied multi-particle systems.
Now you're ready to delve more deeply into QM. Read through the practice problems to tune up your brains after the Summer (and the coop cycle). Then we'll quickly step up to more interesting work. Most problems more complicated than those you solved in QM I and II require use of one approximation scheme or another. Clearly, learning to do Physics is more than just memorizing equations; you need to learn methods for applying them: perturbation theory and the variational principle , for example. We'll examine the interaction of radiation with matter to see how absorption and emission of photons arises from perturbation theory. Then we will study scattering theory which describes how particles interact with each other, as in collisions in a particle accelerator. We will also consider some deep questions and experiments that strike at the core of our understanding of quantum mechanics, including the EPR paradox and Bell's Theorem.
See the Course Schedule for the assigned readings, which you should do before class, so that you are prepared to ask and answer questions.
I will also hand out photocopies of selected passages from other QM texts, as necessary to supplement Griffiths. Here's one from David Mermin:
Mermin on reality and quantum theory
Electronic distractions: Silence your cell phone or leave it home. Only phone calls (to me) from the Nobel Prize committee will be tolerated. Laptop computers may be used only for taking notes. Web surfing, texting, reading/sending email is prohibited during class. I will ask you to leave the class if you violate this rule.
Plagiarism: Use your own very large brain (you're a physicist!) and
don't even think about cheating. See homework rules below. The usual University rules apply. By
stepping into the classroom, you agree to abide by Drexel's policy on
You may discuss the homework with your classmates, but you and you alone are responsible for the work that you turn in. Please write up your own solutions to the problems. Breaches of this policy will result in homework scores being divided by the number of ``participants.'' Second offenses may result in failure (of the class).
Use of solutions to these problems from previous years constitutes plagiarism. You must attribute (by giving the correct reference) any significant help that you receive from outside sources.
Practice Problems 1 (PDF) Just for practice - I give you the solutions!
Practice Problems 2 (PDF) Ditto.
Problem Set 1 (PDF) Due in homework hand in folder or to Justin by 4:00 p.m. Friday, September 30.
Problem Set 2 (PDF) Due in homework hand in folder or to Justin by 4:00 p.m. Friday, October 7.
Problem Set 3 (PDF) Due in homework hand in folder or to Justin by 4:00 p.m. Friday, October 14.
Problem Set 4 (PDF) Due in homework hand in folder or to Justin by 4:00 p.m. Friday, October 21.
Problem Set 2 solutions(PDF)
Problem Set 3 solutions(PDF)
Problem set 2:
Problem 4: Start by considering the hyperfine splitting \Delta E = (4 g_p \hbar^4)/(3 m_p m_e \mu c^2 a_0^4) where a_0=(4\pi \epsilon_0 \hbar^2)/(\mu e^2) and \mu is the reduced mass of electron-proton system (aka the hydrogen atom).
The midterm exam will be in class during week 6 and will cover material during the five weeks or so.
The final exam will be held during exam week, date/time TBA. It will be comprehensive and half closed and half open book. You may bring a calculator to perform numerical calculations only.
|1||September 19, 21||practice problems, Griffiths ch. 6|
|2||September 26, 28||Griffiths ch. 6||HW1|
|3||October 3, 5||Griffiths ch. 9||HW2|
|4||October 12 (Drexel closed on 10/10 for Columbus Day)||Griffiths ch. 9||HW3|
|5||October 17, 19||Griffiths ch. 11||HW4|
|6||October 24, 26||Griffiths ch. 11||Midterm Exam in class 10/26|
|7||October 31, November 2||Griffiths ch. 11|
|8||November 9, 11||Griffiths ch. 11, 7||HW5|
|9||November 16, 18||Griffiths ch. 7, 12||HW6|
|10||November 21 (No Class 11/23 for Thanksgiving Break)||Griffiths ch. 12 and handouts|
|11||November 28, 30||Griffiths ch. 12 and handouts||HW7|
|12||No Class||Final Exam, TBA|
Last update: October 13, 2016.