Timeline for If the conservation of energy is not well defined in General Relativity, can energy be created (or transferred to matter)? [duplicate]
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| Apr 6, 2022 at 19:39 | comment | added | vengaq | @NíckolasAlves sorry I should have indicated in both the question and the comments that I was looking for something that would give energy while space is expanding, not contracting. I have found a few gedankenexperiments like this one (physics.stackexchange.com/q/668248) but nothing specific that can be observed in actual experiments | |
| Apr 6, 2022 at 19:29 | comment | added | Níckolas Alves | My answer to the linked question concerns precisely that. In the cosmological model I gave as en example, the Universe would eventually start to recollapse into a Big Crunch. In this era, the photons would be blueshifted. That model does not apply to our Universe (it has a different matter content), but shows that energy can be created in General Relativity (as long as the spacetime is not stationary, for otherwise conservation of energy is well-defined) | |
| Apr 6, 2022 at 12:31 | comment | added | vengaq | @NíckolasAlves I was looking for a more realistic example in the sense that can be observed by our telescopes (for example something like the redshift that photons suffer when travelling through space but a process that would give energy instead of erasing it) | |
| Apr 4, 2022 at 17:55 | history | closed |
Níckolas Alves Qmechanic♦ general-relativity Users with the general-relativity badge or a synonym can single-handedly close general-relativity questions as duplicates and reopen them as needed. |
Duplicate of Does the expansion of spacetime add energy to matter? [duplicate] | |
| Apr 4, 2022 at 17:48 | review | Close votes | |||
| Apr 4, 2022 at 17:56 | |||||
| Apr 4, 2022 at 17:29 | comment | added | Níckolas Alves | Does this answer your question? Does the expansion of spacetime add energy to matter? | |
| Apr 4, 2022 at 17:19 | history | asked | vengaq | CC BY-SA 4.0 |