Chapter 9 - Time-dependent Perturbation Theory
Semiclassical Conceptual Models

Radiation from an accelerated charge

  • Thomson and Rutherford models
  • Larmor's formula
  • Maxwell Radiation
  • Classical vs QM

    Wien's model

  • Wien model
  • Correspondence limit
  • Compare to QM
  • Large n limit
  • Worst case value
  • Wien's paper (1)
  • Wien's paper (2)
  • Wien's paper (3)
  • Comparison
  • Am. J. Phys.
  • Blending
  • Branched decay

    • Weisskopf-Wigner Approximation

  • Fermi
  • Merzbacher's QM book
  • Approximations
  • Quantum Zeno's paradox (Griffiths pp. 431-434)
  • Evidence available
  • Physics Letters article
  • Blade article
  • Webster
  • Aphorisms
  • Literary wisdom

    Oscillator strength

  • Express as oscillators
  • Oscillator strength

    Spontaneous emission, stimulated emission, and absorption

  • Einstein formulation
  • Modern notation
  • Relationships between absorption and emission
  • Kleppner article

    Calculation for Lyman alpha

  • Angular and radial portions
  • 6-j coefficients (Griffiths pp. 187-188)
  • Calculator
  • Specific calculations
  • Multiplet strengths
  • Formulae
  • Summed A's, n=2,3
  • Summed A's, n=4
  • Level diagram
  • Decay curve

    Exponential growth and decay

  • The exponential concept - PPT
  • Reprint

    Implications of uncontrolled growth

  • The energy crisis
  • Energy supply estimates
  • Hubbert's candle
  • The end is in sight
  • Logistic equation
  • Population data
  • World population
  • Link to logistic curve
  • Clock

    Chaos and fractal escapes

  • Interating the logistic equation
  • Chaotic behavior
  • Stone article
  • Mandlebrot zoom
  • Mandelbrot diverse
  • Fractals