Physical condition for the slowing down of cosmic acceleration

In summary, the conversation discusses the possibility of cosmic acceleration slowing down and the use of Gaussian processes to test this. The analysis suggests that there is no slowing down of acceleration within 95% confidence level and that the reason for the tensions in previous studies may be due to the constraints on dark energy. The conversation also mentions that current data cannot convincingly measure the slowing down of acceleration and that the possibility of it happening in the near future is low.
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wolram
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I find it beyond me to understand all of this paper, only that cosmic acceleration is not slowing down, which is IRC against a lot theories. Bouncing universe for one, and a guaranteed heat death. That is if the U does not slow in the near future.

https://arxiv.org/abs/1701.04973

The possible slowing down of cosmic acceleration was widely studied. However, the imposition of dark energy parametrization brought some tensions. In our recent paper, we test this possibility using a modelindependent method, Gaussian processes. However, the reason of generating these tensions is still closed. In the present paper, we analyse the derivative of deceleration parameter to solve the problems. The reconstruction of the derivative again suggests that no slowing down of acceleration is presented within 95% C.L. from current observational data. We then deduce its constraint on dark energy. The corresponding constraint clearly reveals the reason of tension between different models in previous work. We also study the essential reason of why current data cannot convincingly measure the slowing down of acceleration. The constraints indicate that most of current data are not in the allowed region.
 
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Therefore, the possibility of cosmic acceleration slowing down in near future is much lower.
 

Related to Physical condition for the slowing down of cosmic acceleration

1. How does the physical condition affect the slowing down of cosmic acceleration?

The physical condition, specifically the distribution of matter and energy, determines the gravitational pull in the universe. As the universe expands, the gravitational pull decreases and causes the cosmic acceleration to slow down.

2. Can the physical condition be altered to slow down cosmic acceleration?

It is currently not possible to alter the physical condition on a large scale to directly slow down cosmic acceleration. However, the distribution of matter and energy can have an indirect effect on the expansion of the universe through the influence of gravity.

3. How do dark matter and dark energy play a role in the slowing down of cosmic acceleration?

Dark matter and dark energy are believed to make up a large portion of the matter and energy in the universe. They have a significant influence on the gravitational pull and can contribute to the slowing down of cosmic acceleration.

4. Is there evidence for the slowing down of cosmic acceleration?

Yes, there is evidence from various astronomical observations and experiments that support the idea of cosmic acceleration slowing down. One of the key pieces of evidence is the observation of type Ia supernovae, which have shown that the expansion of the universe is not constant, but is slowing down over time.

5. How does the concept of dark energy relate to the slowing down of cosmic acceleration?

Dark energy is a hypothetical form of energy that is believed to be responsible for the accelerated expansion of the universe. Its presence is necessary for the slowing down of cosmic acceleration, as it counteracts the gravitational pull of matter and helps to maintain the overall expansion rate of the universe.

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