Timeline for Confusion regarding expression of Expectation Value in Quantum Mechanics
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18 events
| when toggle format | what | by | license | comment | |
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| S Apr 28, 2025 at 6:33 | vote | accept | 19thdimensioncosmicstellar | ||
| S Apr 28, 2025 at 6:32 | vote | accept | 19thdimensioncosmicstellar | ||
| S Apr 28, 2025 at 6:33 | |||||
| Apr 28, 2025 at 6:32 | vote | accept | 19thdimensioncosmicstellar | ||
| S Apr 28, 2025 at 6:32 | |||||
| Apr 27, 2025 at 19:56 | comment | added | Tobias Fünke | Consider to accept an answer if your issue has been resolved. And for the next time, please state the particular reference(s), in detail: book title, author(s), chapter, page and equation numbers. | |
| Apr 27, 2025 at 17:57 | comment | added | 19thdimensioncosmicstellar | @GedankenExperimentalist Sorry it should have been "Griffiths" in my previous response, but thanks a lot, understood it. | |
| Apr 27, 2025 at 14:06 | comment | added | flippiefanus | See en.wikipedia.org/wiki/Weak_value Note that there is a difference with respect to the expression of the OP. The weak value is normalized. | |
| Apr 27, 2025 at 10:45 | comment | added | GedankenExperimentalist | @19thdimensioncosmicstellar so its cleared up now right? That expectation value is always the first equation in your post and there is never mixing of two different wavefunctions | |
| Apr 27, 2025 at 10:37 | comment | added | 19thdimensioncosmicstellar | @GedankenExperimentalist exactly from where my confusion rose. Perfectly said. | |
| Apr 27, 2025 at 10:37 | comment | added | 19thdimensioncosmicstellar | @Qmechanic 3.2.1 Giffiths, "most books require an ostensibly stronger condition" for Hermitian Operator. Can refer to this. | |
| Apr 27, 2025 at 9:01 | comment | added | GedankenExperimentalist | If you are following Griffiths, then you might be confusing expectation values with the hermiticity of operators given in section 3.2.1 of 3rd ed | |
| Apr 27, 2025 at 8:57 | answer | added | alanf | timeline score: 0 | |
| Apr 27, 2025 at 8:42 | history | edited | Qmechanic♦ |
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| Apr 27, 2025 at 8:41 | comment | added | Qmechanic♦ | Found in some cases? Which reference? Which page? | |
| Apr 27, 2025 at 8:11 | answer | added | SX849 | timeline score: 1 | |
| Apr 27, 2025 at 7:57 | comment | added | Lagrangiano | An expectation value in a given state is always calculated "sandwiching" the operator between a bra and a ket corresponding to the same state. The last expression you mentioned is called matrix element and it's not an expectation value | |
| Apr 27, 2025 at 7:51 | history | edited | 19thdimensioncosmicstellar | CC BY-SA 4.0 |
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| S Apr 27, 2025 at 7:50 | review | First questions | |||
| Apr 27, 2025 at 8:57 | |||||
| S Apr 27, 2025 at 7:50 | history | asked | 19thdimensioncosmicstellar | CC BY-SA 4.0 |