Methods for energy harvesting in expanding universe?

In summary, there has been much discussion about how could we extract energy from the accelerated expansion of the universe, but the only gedankenexperiment that has been proposed is the "tethered galaxies" one. There has been discussion about whether or not using exceedingly speculative elements like exotic matter is necessary to make use of the expansion, but no concrete proposals have been made yet.
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Suekdccia
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TL;DR Summary
Methods for energy harvesting in expanding universe?
There has been much discussion about how could we (theoretically) extract energy from the accelerated expansion of the universe.

However, the only gedankenexperiment I can found is the "tethered galaxies" one (e.g. https://arxiv.org/abs/astro-ph/0104349).

However, has somebody proposed an alternative mechanism or can someone come up with an alternarive scenario where we could make useful work from the accelersted universe expansion without using exceedingly speculative elements (like exotic matter)?
 
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Suekdccia said:
There has been much discussion
Where? By whom?
Suekdccia said:
the only gedankenexperiment I can found is
Than how can you say there is a lot of discussion?

Many of your threads have bad starts, but you are opening with a contradiction here.
 
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  • #3
Didn't we just have a thread about this recently here on PF?
 
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Suekdccia said:
Has somebody proposed an alternative mechanism or can someone come up with an alternarive scenario where we could make useful work from the accelersted universe expansion without using exceedingly speculative elements (like exotic matter)?
You are misdescribing the scenario that was discussed in your previous thread (linked to in post #4). The "exotic matter" involved is just dark energy, i.e., the thing that is causing the accelerated expansion. The speculative model in the paper cited in your previous thread was, as discussed in that thread, just an alternative way of modeling dark energy (and, as I pointed out in that thread, I don't really see the point of the alternative way of doing it, just doing the analysis in standard de Sitter spacetime would be simpler).

Further discussion can be done in the previous thread; there is no point in having two open threads on the same topic.

Thread closed.
 
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1. What is energy harvesting in the expanding universe?

Energy harvesting in the expanding universe refers to the process of extracting usable energy from the expansion of the universe. This energy is believed to be generated by the acceleration of the expansion itself, and can potentially be harnessed for various practical applications.

2. How does energy harvesting in the expanding universe work?

The exact mechanism of energy harvesting in the expanding universe is still not fully understood. However, it is believed that the energy is generated through the conversion of gravitational potential energy into kinetic energy as the universe expands. This energy can then be captured and converted into usable forms.

3. What are the potential applications of energy harvesting in the expanding universe?

Some potential applications of energy harvesting in the expanding universe include powering spacecrafts and satellites, providing energy for long-distance space travel, and potentially even powering entire civilizations. However, more research is needed to fully understand the feasibility and limitations of these applications.

4. What are the challenges in developing methods for energy harvesting in the expanding universe?

One of the main challenges in developing methods for energy harvesting in the expanding universe is the limited understanding of the process itself. Scientists are still working to better understand the mechanisms and potential limitations of this energy source. Additionally, the technology and infrastructure needed to harness and utilize this energy may also pose challenges.

5. What are some current research efforts in the field of energy harvesting in the expanding universe?

There are ongoing research efforts to better understand the process of energy harvesting in the expanding universe, as well as to develop technologies and methods for harnessing this energy. Some studies are also exploring the potential environmental and ethical implications of utilizing this energy source. Additionally, collaborations between scientists and engineers are being formed to advance the research in this field.

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