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Physics 451

Physics 451. Quantum mechanics I Fall 2012. Karine Chesnel. Teaching assistant: Muxue Liu angela19881217@hotmail.com. Physics 451 Quantum Mechanics - Foundations. Class: M, W, F at 9 am C285 ESC. Instructor: Karine Chesnel N319 ESC 801-422-5687 kchesnel@byu.edu

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Physics 451

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  1. Physics 451 Quantum mechanics I Fall 2012 Karine Chesnel

  2. Teaching assistant: Muxue Liu angela19881217@hotmail.com Physics 451Quantum Mechanics - Foundations • Class: M, W, F at 9 am C285 ESC Instructor: Karine Chesnel N319 ESC 801-422-5687 kchesnel@byu.edu Office hours: MWF 10-11am

  3. France Post-Doc Lawrence Berkeley Lab MS in Physics Ecole Normale Superieure PhD in Physics University Joseph Fourier A little bit about your teacher…

  4. A little bit about your teacher… BYU Magnetometry Magnetic microscopy Our Lab www.physics.byu.edu/faculty/chesnel/

  5. Physics 451Quantum Mechanics - Foundations • Textbook: David J. Griffiths Introduction to Quantum Mechanics, 2nd ed. • Get your CID: www.physics.byu.edu/Courses/cid.aspx • Register your I-clicker

  6. Oct 29 – Nov 16 Schrödinger equation in spherical coordinates Hydrogen atom Angular momentum Spin Exam III: Nov 16- Nov 20 Sep 26 – Oct 22 Nov 26 – Dec 5 Delta function potential Finite square well Formalism Uncertainty principle Two-particles systems Atoms Solids Final review Final Exam: W Dec 12, 7am Exam II: Oct 22 - Oct 25 APS Four corners Oct 26-27 Physics 451- schedule Aug 27 – Sept 21 Schrödinger equation Wave function Stationary states Harmonic oscillator Infinite square well Free particle Exam I: Sep 24- Sep 27

  7. Physics 451- Homework • Homework twice a week: generally due T & Th 7pm • Help sessions T & Th afternoons 3- 6 pm • Return your homework in the Phys 451 slots across N373 ESC • ALWAYS put your CID on first page of your work • If you use computer softwares (Matlab, Maple, Mathematica…) to do a calculation, don’t forget to print and include all your actual work.

  8. Physics 451 Help sessions Help sessions on Tuesday & Thursday from 3 to 6pm room N 337 (undergraduate lab) First session: this Thursday Aug 30

  9. Physics 451 Homework First homework assignment: next Friday Aug 31st by 7pm Assignment # 1: Problems 1.1, 1.2, 1.3 In the textbook

  10. Physics 451- Grading • In class quizzes: 10% • Homework: 40% • Exams: 30% • Final 20% Check your grade during the semester: www.physics.byu.edu/Courses/Grades.aspx

  11. Until 20th century: Classical Newtonian Mechanics… Newton’s second Law Kinetic energy Mechanical energy of the system Introduction toQuantum mechanics Some History Deterministic view: All the parameters of one particle can be determined exactly at any given time

  12. Werner Heisenberg 1901-1976 Erwin Schrödinger 1887-1961 Wolfgang Pauli 1900- 1958 Uncertainty Principle Schrödinger Equation Pauli exclusion principle Introduction toQuantum mechanics Some History Early 20th century: Some revolutionary ideas from bright minds…

  13. 3) Wave-particle duality: All particles can be described as waves (travelling both in space and in time) The state of the particle is given by a wave function Introduction toQuantum mechanics Essential ideas 1) Uncertainty principle: Conjugates quantities of a particle (ex: position & momentum) can not be known simultaneously within a certain accuracy limit 2) Quantization: The measurement of a physical quantity in a confined system results in quanta (the measured values are discrete) 4) Extrapolation to classical mechanics: The laws of classical Newtonian mechanics are the extrapolation of the laws of quantum mechanics for large systems with very large number of particles

  14. Introduction toQuantum mechanics Essential ideas Schrödinger equation (1926)

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