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Physics 451

Physics 451. Quantum mechanics I Fall 2012. Sep 26, 2012 Karine Chesnel. Quantum mechanics. Announcements. Test 1 Until tomorrow Thursday night!. Homework this week: HW # 8 due Friday Sep 28 by 7pm. Crystal. Atom. Bound states. Quantum mechanics. Ch 2.5.

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Physics 451

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  1. Physics 451 Quantum mechanics I Fall 2012 Sep 26, 2012 Karine Chesnel

  2. Quantum mechanics Announcements Test 1 Until tomorrow Thursday night! • Homework this week: HW # 8 • due Friday Sep 28 by 7pm

  3. Crystal Atom Bound states Quantum mechanics Ch 2.5 Bound and Scattering states In solid state physics Electron, X-ray scattering: Free particle ‘Scattering state” Bound state

  4. E2 E1 Quantum mechanics Ch 2.5 Bound and Scattering states A mechanical analogy V(x) x

  5. V(x) Scattering state Bound state Harmonic oscillator Infinite square well Free particle 0 a x x Quantum mechanics Ch 2.5 Bound and Scattering states Scattering state Bound state Bound state

  6. Scattering state Bound state Quantum mechanics Ch 2.5 Bound and Scattering states V(x) x In physical reality:

  7. Quantum mechanics Ch 2.5 The Dirac delta function for for

  8. Ch 2.5 Phys 451 Quiz 11 What is equal to? • 1 • f(-5) • f(5) • f(x) • zero

  9. For Quantum mechanics Ch 2.5 The delta function potential

  10. is continuous is continuous except where V is infinite Quantum mechanics Ch 2.5 The delta function potential Continuity at boundaries

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