| Differences between revisions 2 and 7 (spanning 5 versions) | Back to page |
|
Size: 1051
Comment:
|
Size: 95
Comment:
|
| Deletions are marked like this. | Additions are marked like this. |
| Line 1: | Line 1: |
| == Questions and answers about the lecture or lecture notes == | == Questions and answers about lectures or lecture notes == |
| Line 3: | Line 3: |
| Question hello i'm reading through the lecture notes and i have some questions. first, what is meant by $\psi^*$? i think ive seen that before but i do not remember and its not in any of my notes. is it the wave function of a particle moving in the opposite direction as $\psi$? Answer $\psi^*$ is literally the complex conjugate of $\psi$. The physical meaning is actually exactly as you say! Moving in the opposite direction! A more correct way to say it is the time-reversed state. However, just knowing "complex conjugate" is fine at this point. Question also, is the hamiltonian operator just the energy of the system? i have never heard of it before this class. Answer It could be that it was shown with the Schrodinger equation, and the meaning was not let known. TISE (time-independent Schrodinger equation): $H \psi = E \psi$. $H$ is the QM operator for energy. The eigenvalue of $H$ or the expectation value of $H$ is the energy. |
[[Wave function, Hamiltonian]] |