PHY 341
Welcome to PHY 341 – Quantum Mechanics I homepage
We will use this space to post extra course materials, like homework, solutions, announcements, etc.
If you have any interesting and related links, we can add them too.
- Announcements
- Asynchronous video: Apr 4 Fri: Schwarz inequality (15:40) || Jan 29 Wed: JupyterHub and Jupyter notebook (17:46) || Jan 29 Wed: Youtube video: i in the Schrodinger eqn (from Charlie, 25:05)
- Class recording: Apr 28 Mon: Sch. Eq. in Sph. Coordinates || Apr 25 Fri: Sch. Eq. in 3D || Apr 23 Wed: Quantum computing/qubits || Apr 18 Fri: Basis transformation&computation || Apr 16 Wed: Matrix formulation || Apr 14 Mon: Dirac notations || Apr 11 Fri: Uncertainty principle || Feb 26 Wed: Hermitian conjugates || Feb 10 Mon: Infinite potential well || Feb 3 Mon: Operator algebra || Jan 31 Fri: Expectation values, operators
- Tutor schedule: MW 1-2, STEM Lab (SENG 217), Make appointment here; For other times (MW 2-3), email Sophia separately (sbernardo1 (at) umassd (dot) edu)
- Announcement Jan 20 2025: Research Experience for Undergraduates
- More REUs: SPS jobs
- PHY 341 Syllabus
- Useful math formulas
- Homework 1a (due Feb 3 M)
- Homework 1b (due Feb 10 M)
- Homework 2a (due Feb 18 T)
- Homework 2b (due Feb 24 M)
- Homework 2c (due
Mar 8 AMar 17 M [bonus]) - Homework 2d (due Mar 24 M)
- Homework 2e (due Mar 31 M)
- Homework 3a (due Apr 14 M)
- Homework 3b (due Apr 23 W)
- Concepts: Operators || Uncertainty principle || Possible wave functions || Bound and scattering states || Inf. potential well || QM Concept 1 || Wave function 1
The programs are in the Jupyter notebook format. You can download it and open it with Jupyter. If you do not have access to a Jupyter installation or server, you can go to try.jupyter.org on the cloud, and upload the notebook there.
Note: Due to some weird, nonsensical rule of the site disallowing the “.ipynb” file extension, I have the programs in .zip (or plain .txt) formats. If you download a zip file, unzip it to recover the .ipynb file. If you download the .txt file (right click then save), just rename “somefile-ipynb.txt” to “somefile.ipynb”.
- Local Jupyter/Python server. For the first time, make sure to login using UMD credentials via ssh ( eg putty on Windows) with putty rps.cscvr.umassd.edu. Simply exit after login. This will create a proper directory structure. Subsequently, you can login by clicking on the link.
- cocalc.com (if you have nothing better)
- Motion of a quantum oscillator: You may run or edit this program in your web browser from (a) homepage here (scroll to bottom); or (b) Glowscript version; or (c) Program_8.2_sdlf.ipynb. Download and save the named program, making sure to extract all including the associated library files, ode.py, vpmnb.py in one place. Upload the files to your Jupyter notebook.
- Simulation of averages by ramdom sampling in free fall in zip format.
- Superposition of states in zip format. HW 2a refers to this program.
- Exploration of discreteness of states in zip format.
- Expansion/integrals with Sympy in zip format.
- SHO with sympy in zip format.
- SHO classically forbidden zones in zip format.
- SHO allowed energies in zip format.
- Momentum wf of a square in zip format.
- Momentum wf of a Gaussian in zip format.
- Square well: unbound states in zip format.
- Square well: allowed energies and wave functions in zip format.
- Square well: visualizing bound states in zip format.
- Momentum wf (Gaussian) with sympy in zip format.
- Finding eigenstates of matrices algebraically and numerically with sympy/scipy in zip format.
- Basis transformation and qubits with sympy in zip format.