Griffiths – Introduction to Quantum Mechanics problems

Here are my solutions to various problems in David J. Griffiths’s excellent textbook Introduction to Quantum Mechanics, Second Edition. Obviously I can’t offer any guarantee that all the solutions are actually correct, but I’ve given them my best shot.

These solutions are the only ones that I’ve worked out so far, so please don’t ask me to post “the rest of the chapters” as I haven’t worked on those yet. I will get to them eventually.

Chapter 1 – The Wave Function

1.71.13, 1.14

Chapter 2 – Time-Independent Schrödinger Equation

2.1, 2.2, 2.3, 2.42.5, 2.6, 2.7, 2.8, 2.9, 2.10, 2.11, 2.12, 2.13, 2.14, 2.15, 2.16, 2.17a, 2.17b-d, 2.18, 2.19, 2.202.21, 2.22, 2.232.24, 2.25, 2.262.27, 2.28, 2.29, 2.30, 2.312.32, 2.33, 2.34, 2.35, 2.36, 2.37, 2.38, 2.39, 2.40, 2.41, 2.42, 2.43, 2.44, 2.45, 2.46, 2.48, 2.49, 2.50, 2.51, 2.52, 2.53, 2.54, 2.55, 2.56

Chapter 3 – Formalism

3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.14, 3.15, 3.16, 3.17, 3.18, 3.19, 3.203.21, 3.22, 3.23, 3.24, 3.25, 3.26, 3.27, 3.28, 3.29, 3.30, 3.31, 3.32, 3.33, 3.34, 3.35, 3.36, 3.37, 3.38, 3.39, 3.40

Chapter 4 – Quantum Mechanics in Three Dimensions

4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 4.10, 4.11, 4.12, 4.13, 4.14, 4.15, 4.16, 4.17, 4.18, 4.19, 4.20, 4.21, 4.22, 4.23, 4.24, 4.25, 4.26, 4.27, 4.28, 4.29, 4.30, 4.31, 4.32, 4.33, 4.34, 4.35, 4.36, 4.374.38, 4.39, 4.40, 4.41, 4.42, 4.43, 4.44, 4.45, 4.464.47, 4.48, 4.49, 4.50, 4.51, 4.52, 4.53, 4.54, 4.55, 4.56, 4.57, 4.584.59, 4.60, 4.61

Chapter 5 – Identical Particles

5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 5.10, 5.11, 5.12, 5.13, 5.13d, 5.14, 5.15, 5.16, 5.17, 5.18, 5.19, 5.20, 5.21, 5.22, 5.23, 5.24, 5.25, 5.26, 5.27, 5.28, 5.29, 5.30, 5.315.32, 5.33, 5.345.35, 5.36, 5.37

Chapter 6 – Time-independent Perturbation Theory

6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.96.10, 6.11, 6.12, 6.146.15, 6.16, 6.17, 6.18, 6.19, 6.20, 6.21, 6.22, 6.23, 6.24, 6.25, 6.26 (weak field), 6.26 (strong field), 6.26 (general case), 6.27, 6.29, 6.30, 6.31, 6.32, 6.33, 6.34, 6.35, 6.36, 6.37, 6.386.39, 6.40

Chapter 7 – The Variational Principle

7.1, 7.2, 7.3, 7.4, 7.5, 7.7, 7.8, 7.9, 7.10, 7.11, 7.12, 7.13, 7.14, 7.15, 7.16, 7.17, 7.18, 7.19, 7.20

Chapter 8 – The WKB Approximation

8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.88.9, 8.10, 8.11, 8.12, 8.13, 8.14, 8.15a, 8.15b-f, 8.168.17

Chapter 9 – Time-Dependent Perturbation Theory

9.1, 9.2, 9.3, 9.4, 9.5, 9.6

Chapter 11 – Scattering

11.1

Comments

  • Mudasra Kanwal  On Monday, 4 March 2013 at 17:29

    This is a best problem site which has helped me lot. in understanding physcs especially quantum mechanics

  • emmanuel  On Saturday, 11 May 2013 at 16:38

    This site is superb, thanks to the originators.

  • emmansonuel  On Saturday, 11 May 2013 at 16:39

    Superb site, Thanks to the originator(s)

  • tsah  On Sunday, 29 September 2013 at 09:00

    hi i am looking for the solution for problem 2.17 in the second edition. can you help me>

    • growescience  On Sunday, 29 September 2013 at 09:12

      I have already posted this – see above.

  • Christian  On Thursday, 19 December 2013 at 19:45

    You have no idea how much your website has helped me. Thank you so much.

  • Anonymous  On Thursday, 1 May 2014 at 11:52

    Helpful to read longer and thoroughly explained answers – thank you

  • Lam Wing Sum  On Saturday, 24 May 2014 at 01:53

    Great thanks!!!

  • asad  On Thursday, 5 June 2014 at 11:57

    dude splended job i am reallygrateful to you
    asad

  • asad  On Monday, 29 September 2014 at 05:42

    again thanks dude

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