PHYSICS 360 - Quantum Mechanics Spring 2012 1 Monday 9 Jan Why did they need to invent Quantum Mechanics? 16 Jan Martin Luther King Jr. Holiday 2 3 4 5 23 Jan If we make momentum an operator,will it agree with classical physics? Chapter 1.5 HW #1 due 30 Jan If all the eigenfunctions are stationary states, how can QM handle time dependent dynamics? Chapter 2.1 HW #2 due 6 Feb How can you get quantized energy levels from an harmonic oscillator, which has no boundary conditions? Chapter 2.3.1 HW #3 due 13 Feb MidTerm Exam #1 6 7 8 Wednesday 11 Jan Which one is THE Schrödinger Equation? What is an eigenvalue equation? Chapter 1.1 18 Jan Since quantum mechanics relies on probabilities, how do we quantify uncertainty? Chapter 1.3 25 Jan Why do particles act like waves, and what then is their wavelength? Chapter 1.6 Friday 13 Jan "Is the Moon really there when nobody looks?" Chapter 1.2 1 Feb How do the boundary condition alone give quantized energy levels? Chapter 2.2 3 Feb The infinite square well: What can we do with a complete set of wave functions? Chapter 2.2 8 Feb Raising & lowering operators: what are the limits? Chapter 2.3.1 10 Feb Quantum Harmonic Oscillator: what are the wave functions? (Mathematica to the rescue!) Chapter 2.3.2 15 Feb "There is no such thing as a free particle with a definite energy." Really? Chapter 2.4 22 Feb Where do wave functions live? (In Hilbert space, of course!) Chapter 3.1, 3.2 17 Feb How do particles "tunnel" through infinitely high (but thin) barriers? Chapter 2.5 20 Feb What if the square well isn't infinitely deep? (Bound states and scattering states) Chapter 2.6 HW #4 due 27 Feb 29 Feb Why is it you can only measure How can the Uncertainty Principle ONE eigenvalue at a time, no matter apply to time (Δt)? how messy the wave function is? Chapter 3.5 (This is nothing like classical physics!) Chapter 3.4 HW #5 due 20 Jan Normalization: What is the probability that a particle has to be somewhere? Chapter 1.4 27 Jan If particles were NOT waves, would there be an Uncertainty Principle? Chapter 1.6 24 Feb Why do we need Hermitian operators to handle things we can measure? Chapter 3.3 2 Mar Surely Quantum Mechanics isn't stuck in just one dimension, is it? Chapter 4.1 PHYSICS 360 - Quantum Mechanics Spring 2012 9 5 Mar How do we get spherical harmonics from spherical potentials? Chapter 4.1 HW #6 due Spring Break - March 10-18 19 Mar How much did you forget about the hydrogen atom over Spring Break? 10 Chapter 4.2 HW #7 due 11 12 13 14 15 26 Mar Midterm Exam #2 7 Mar Finally, the hydrogen atom. Did Bohr get anything right? Chapter 4.2 9 Mar What do the hydrogen electron orbitals look like? Chapter 4.2 21 Mar Back to operator algebra and commutators: What are the allowed angular momentum values? Chapter 4.3 23 Mar Why does the Uncertainty Principle limit the angular momentum states? Chapter 4.3 28 Mar Spin: How do we do this without knowing the wave functions? Chapter 4.4 4 Apr Can you quantize the spin of a pair of electrons? (Entangled states!) Chapter 4.4 30 Mar If a spin points in the x direction, what do you get in the y direction? Chapter 4.4 6 Apr What if you can't tell the difference between your two particles? Chapter 5.1 2 Apr How do you build a Stern-Gerlach apparatus? Chapter 4.4 HW #8 due 9 Apr 11 Apr 13 Apr Is there really a force between Does understanding hydrogen help Is the entire periodic table just an fermions? Is there a force law? at all with helium? example of the Pauli Exclusion Chapter 5.1 Chapter 5.2 Principle? HW #9 due Chapter 5.2 16 Apr 18 Apr 20 Apr Can quantum mechanics explain Why are some solids metallic, and What role does quantum mechanics how a metal works? others insulating? play in determining temperature? Chapter 5.3 Chapter 5.3 Chapter 5.4 HW #10 due 23 Apr 25 Apr 27 Apr Quantum Statistics: Now can we No, seriously: Is the Moon really Review explain the Planck black body there when nobody looks? spectrum? Chapter 12.1, 12.2 Chapter 5.4 Finals Week Apr 30-May 5 (PHYS 360 final date & time to be announced later)