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Quantum Mechanics Problems and Solutions

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  • Brian C HartB Offline
    Brian C HartB Offline
    Brian C Hart
    wrote on last edited by
    #1

    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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    • 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

      C Offline
      C Offline
      co7eguy
      wrote on last edited by
      #2

      Great Post!:)

      1 Reply Last reply
      0
      • 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

        C Offline
        C Offline
        Chris Austin
        wrote on last edited by
        #3

        Check out the website dedicated to my old Quantum Prof. http://sps.la.asu.edu/~aaron/sankey.html[^] Hey don't worry, I can handle it. I took something. I can see things no one else can see. Why are you dressed like that? - Jack Burton

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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

          C Offline
          C Offline
          Chris Maunder
          wrote on last edited by
          #4

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

          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

            N Offline
            N Offline
            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
            0
            • 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

              N Offline
              N Offline
              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

                M Offline
                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
                  0
                  • 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
                    0
                    • 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

                      N Offline
                      N Offline
                      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
                      0
                      • 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

                        N 1 Reply Last reply
                        0
                        • Brian C HartB Brian C Hart

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

                          N Offline
                          N Offline
                          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

                            N Offline
                            N Offline
                            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
                            0
                            • 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

                              C Offline
                              C Offline
                              CSharpDavid
                              wrote on last edited by
                              #14

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

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