QM Lecture 7

CHAPTER-7 AMPLITUDE PROBABILITY

7.1 Quantum mechanics description in terms of base-states

7.2 Probability amplitude

7.3 General Guiding principles to assign amplitude probabilities

7.4 Interference between Amplitude Probabilities

7.4.A Two-slit experiment: Watching electrons’ trajectories

Adding amplitude-probabilities for events producing the same final state.

Adding probabilities for vents producing different final states.

7.4.B Neutron Scattering from a crystal by particles with or without spin

7.4.B.a Angular Momentum and Magnetic Dipole

Orbital angular momentum

The Stern-Gerlach experiment: Measurement of the magnetic dipole .

Bohr’s quantization of the angular momentum.

Electron Spin, . Spin gyromagnetic ratio

Nuclear spin

7.4.B.b Scattering form a crystal of atoms with spin zero

7.4.B.c Scattering form a crystal of atoms with spin ½.

References

R. Feynman, “The Feynman Lectures on Physics,” Volume III, Chapter 3.

R. Eisberg and R. Resnick, “Quantum Physics,” 2nd Edition, Wiley, 1985. Sections 8-1 to 8-3.

B. H. Bransdem& C.J. Joachin, “Quantum Mechanics” 2nd Ed. Prentice Hall, 2000. Section 1.5.