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Quantum Mechanics Problems and Solutions

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  • Brian C HartB Brian C Hart

    Hello all, Been keeping busy in the physics dept. at UC Irvine as a grad student... for anyone interested in Quantum Mechanics, here is a link to the problems and solutions to all the homework in our graduate Quantum Mechanics course, the second course in a three-part series. http://www.ags.uci.edu/~bchart/notes/QMProbSolts.pdf[^] Let me know if there are any corrections or mistakes! :) If you need help with the math or any math or physics terms, search for them using: 'PhysicsWorld' or 'MathWorld' (if one doesn't work, then try the other! at PhysicsWorld[^ or MathWorld[^] or use Google. Enjoy! Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

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    Chris Maunder
    wrote on last edited by
    #4

    Ah...the memories... Love this stuff - thanks for sharing, Brian. cheers, Chris Maunder

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    • Brian C HartB Brian C Hart

      Hello all, Been keeping busy in the physics dept. at UC Irvine as a grad student... for anyone interested in Quantum Mechanics, here is a link to the problems and solutions to all the homework in our graduate Quantum Mechanics course, the second course in a three-part series. http://www.ags.uci.edu/~bchart/notes/QMProbSolts.pdf[^] Let me know if there are any corrections or mistakes! :) If you need help with the math or any math or physics terms, search for them using: 'PhysicsWorld' or 'MathWorld' (if one doesn't work, then try the other! at PhysicsWorld[^ or MathWorld[^] or use Google. Enjoy! Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

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      Nitron
      wrote on last edited by
      #5

      After your perturbation in eq. 2.8, you go on to compute an expectation value for θ on page 10. After you substitute terms, you state the equation is exactly equal to itself. :~ Did you intend to list the same equation twice? - Nitron


      "Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

      Brian C HartB 1 Reply Last reply
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      • Brian C HartB Brian C Hart

        Hello all, Been keeping busy in the physics dept. at UC Irvine as a grad student... for anyone interested in Quantum Mechanics, here is a link to the problems and solutions to all the homework in our graduate Quantum Mechanics course, the second course in a three-part series. http://www.ags.uci.edu/~bchart/notes/QMProbSolts.pdf[^] Let me know if there are any corrections or mistakes! :) If you need help with the math or any math or physics terms, search for them using: 'PhysicsWorld' or 'MathWorld' (if one doesn't work, then try the other! at PhysicsWorld[^ or MathWorld[^] or use Google. Enjoy! Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

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        Nitron
        wrote on last edited by
        #6

        sorry, 1 more thing... Before equation 2.25, (page 12) instead of:

        There results

        Try:

        Their results:

        (not to be picky ;P ) Doh! (1.11, p.16) too! - Nitron


        "Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

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        • Brian C HartB Brian C Hart

          Hello all, Been keeping busy in the physics dept. at UC Irvine as a grad student... for anyone interested in Quantum Mechanics, here is a link to the problems and solutions to all the homework in our graduate Quantum Mechanics course, the second course in a three-part series. http://www.ags.uci.edu/~bchart/notes/QMProbSolts.pdf[^] Let me know if there are any corrections or mistakes! :) If you need help with the math or any math or physics terms, search for them using: 'PhysicsWorld' or 'MathWorld' (if one doesn't work, then try the other! at PhysicsWorld[^ or MathWorld[^] or use Google. Enjoy! Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

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          M Offline
          Marc Clifton
          wrote on last edited by
          #7

          Let me know if there are any corrections or mistakes! :laugh::laugh::laugh::laugh::laugh: What a comedian!!! Marc Help! I'm an AI running around in someone's f*cked up universe simulator.
          Sensitivity and ethnic diversity means celebrating difference, not hiding from it. - Christian Graus
          Every line of code is a liability - Taka Muraoka
          Microsoft deliberately adds arbitrary layers of complexity to make it difficult to deliver Windows features on non-Windows platforms--Microsoft's "Halloween files"

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          • N Nitron

            After your perturbation in eq. 2.8, you go on to compute an expectation value for θ on page 10. After you substitute terms, you state the equation is exactly equal to itself. :~ Did you intend to list the same equation twice? - Nitron


            "Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

            Brian C HartB Offline
            Brian C HartB Offline
            Brian C Hart
            wrote on last edited by
            #8

            Nitron wrote: After your perturbation in eq. 2.8, you go on to compute an expectation value for θ on page 10. After you substitute terms, you state the equation is exactly equal to itself. Notice the final line is the first-order correction term to the expectation value, not the expectation value itself...that was the original claim. What I did is take the final line of the computation of the expactation value and then break it into a sum of two terms, + < |Integral| > and it is the second term which is the deisired result. This leads to the original claim. Q.E.D. Nitron wrote: Did you intend to list the same equation twice? Typically once I show the claim I like to remind the reader what the original claim was. Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

            Brian C HartB N 2 Replies Last reply
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            • Brian C HartB Brian C Hart

              Nitron wrote: After your perturbation in eq. 2.8, you go on to compute an expectation value for θ on page 10. After you substitute terms, you state the equation is exactly equal to itself. Notice the final line is the first-order correction term to the expectation value, not the expectation value itself...that was the original claim. What I did is take the final line of the computation of the expactation value and then break it into a sum of two terms, + < |Integral| > and it is the second term which is the deisired result. This leads to the original claim. Q.E.D. Nitron wrote: Did you intend to list the same equation twice? Typically once I show the claim I like to remind the reader what the original claim was. Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

              Brian C HartB Offline
              Brian C HartB Offline
              Brian C Hart
              wrote on last edited by
              #9

              mega math nerd message there... :) Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

              N 1 Reply Last reply
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              • Brian C HartB Brian C Hart

                Nitron wrote: After your perturbation in eq. 2.8, you go on to compute an expectation value for θ on page 10. After you substitute terms, you state the equation is exactly equal to itself. Notice the final line is the first-order correction term to the expectation value, not the expectation value itself...that was the original claim. What I did is take the final line of the computation of the expactation value and then break it into a sum of two terms, + < |Integral| > and it is the second term which is the deisired result. This leads to the original claim. Q.E.D. Nitron wrote: Did you intend to list the same equation twice? Typically once I show the claim I like to remind the reader what the original claim was. Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

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                Nitron
                wrote on last edited by
                #10

                This[^] is what I was questioning... - Nitron


                "Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

                Brian C HartB 1 Reply Last reply
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                • N Nitron

                  This[^] is what I was questioning... - Nitron


                  "Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

                  Brian C HartB Offline
                  Brian C HartB Offline
                  Brian C Hart
                  wrote on last edited by
                  #11

                  Gotcha :) Thanks Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

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                  • Brian C HartB Brian C Hart

                    Gotcha :) Thanks Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

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                    Nitron
                    wrote on last edited by
                    #12

                    ;) - Nitron


                    "Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

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                    • Brian C HartB Brian C Hart

                      mega math nerd message there... :) Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

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                      Nitron
                      wrote on last edited by
                      #13

                      Brian Hart wrote: mega math nerd message there... ;P - Nitron


                      "Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

                      1 Reply Last reply
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                      • Brian C HartB Brian C Hart

                        Hello all, Been keeping busy in the physics dept. at UC Irvine as a grad student... for anyone interested in Quantum Mechanics, here is a link to the problems and solutions to all the homework in our graduate Quantum Mechanics course, the second course in a three-part series. http://www.ags.uci.edu/~bchart/notes/QMProbSolts.pdf[^] Let me know if there are any corrections or mistakes! :) If you need help with the math or any math or physics terms, search for them using: 'PhysicsWorld' or 'MathWorld' (if one doesn't work, then try the other! at PhysicsWorld[^ or MathWorld[^] or use Google. Enjoy! Sincerely Yours, Brian Hart Department of Physics and Astronomy University of California, Irvine

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                        CSharpDavid
                        wrote on last edited by
                        #14

                        Hamiltonian hmmm let me see, there is George the III ....... :-D

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