1. Quantum II (PHYS 4410) Lecture 19 Systems of identical particles. HWK 6 is due today at 6PM. Exam is coming on Oct. 16, 7:30-9P here.

3. 2014 Nobel Prize in Physics “…are rewarded for inventing a new energy - efficient and environment-friendly light source – the blue light- emitting diode (LED). “ Isamu Akasaki, Hiroshi Amano and Shuji Nakamura

4. Physics Colloquium 4PM today, Duane G1B20 Prof. Thomas Schibli, University of Colorado Boulder “Chasing Away the Noise in Short-Pulse Lasers"

6. 150 A) Symmetric B) Anti-symmetric C) Both A and B D) Neither A or B Two non-interacting particles, A and B, are in an infinite square well spanning 0<=x<= a. They are in an eigen state of the hamiltonian: With respect to exchange, this state vector is:

7. 150 A) Symmetric B) Anti-symmetric C) Both A and B D) Neither A or B Two non-interacting particles, A and B, are in an infinite square well spanning 0<=x<= a. They are in a state: With respect to exchange, this state vector is:

9. 150 A) Yes B) No C) Depends D) None of the above Two non-interacting particles, A and B, are in an infinite square well spanning 0<=x<= a. They are in a state: Is this state vector an eigen state of H?

10. 150 A) Boson B) Fermion C) Neither A or B An electron and a proton (both spin ½ particles) in a hydrogen atom are prepared in a state vector: The composite system behaves like a:

12. 150 A) -13.6 eV B) -27 eV C) -54 eV D) -108 eV E) Something else Two non-interacting electrons around a Helium nucleus are predicted to have a total energy of approximately: