Timeline for Questions about the Unruh effect derivation in Wald's QFT in curved spacetime
Current License: CC BY-SA 4.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 19, 2022 at 0:00 | history | tweeted | twitter.com/StackPhysics/status/1504970918988328964 | ||
| Mar 18, 2022 at 23:05 | vote | accept | Rafael Mancini | ||
| Mar 18, 2022 at 20:14 | answer | added | Níckolas Alves | timeline score: 1 | |
| Mar 18, 2022 at 19:51 | comment | added | Níckolas Alves | Are you sure of that expression? In my copy, (5.1.26) reads $\epsilon^{ab} = \sum_i \exp(- n \omega_i/a) 2 (\psi_{i I})^{(a}(\psi_{i II})^{b)}$, with a sum, not a product | |
| Mar 18, 2022 at 17:40 | comment | added | Rafael Mancini | Yes, that I kind of understand. What I don't understand is that product symbol appearing in the definition of $\varepsilon^{ab}$. | |
| Mar 18, 2022 at 17:25 | comment | added | Gold | Wald uses his abstract index notation for Hilbert spaces as well by what I remember, and it can indeed become confusing. Still, these are just tensor products. The quantity $\varepsilon^{ab}$ has two indices because it is an element of a tensor product space. The objects $\psi_{iI}^a$ and $\psi_{iII}^b$ are vectors on the individual factor spaces and $\psi_{iI}^{(a}\psi_{iII}^{b)}$ is (I believe) their symmetrized tensor product. | |
| Mar 18, 2022 at 17:15 | history | edited | Rafael Mancini | CC BY-SA 4.0 |
added 5 characters in body
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| Mar 18, 2022 at 16:13 | history | asked | Rafael Mancini | CC BY-SA 4.0 |