We know that the universe is expanding with acceleration. Can there be any event of such a large scale that can alter the trend of expansion and begin contraction or even stagnant universe?? Lets discuss
Depends on whether dark energy actually is real or not. On the other hand, the observational evidence suggest that the Universe is approximately flat. This means, in the presence of dark energy, the Universe will continue expanding without halt. Its not very affirmative whether dark energy is of quintessence or phantom type. If the nature is phantom, the Universe will evolve into a big rip scenario.
Mrinnoy Gohain Thank you Prof. Gohain for the answer. I think its a scary scenerio. If dark energy is of quintessence type, then what can be the possible scenerio?? and can there be a big collapse, any such scenerio according to you>>>
Dear Ronit Karmakar,
To the best of my knowledge, (at least) one large-scale event/quantum mechanism could be obfuscating our cosmological observations and leading us to belive that the universe is expanding at an accelerated rate when the fact of the matter is that this might not be the case.
In a way, according to my calculations, Zwicky's tired light mechanism should be revisited, even if it was obviously flawed, and though I did not come up with this mechanism by thinking 'a la Zwicky', but the other way round.
I double checked some widely accepted methods in QFT that did not entirely convince me and came up with this idea/mechanism. And, once implemented to fix the issues I was uncomfortable with (thinking 'a la Feynman'), I reviewed its cosmological implications, and found a link to Zwicky's old-fashioned ideas.
This quantum mechanism, which needs the CMB as a prerequiste to work accross the universe, could provide an (altenative to dark energy/quintessence) explanation for large part of the cosmological redshift that we are detecting from different sources --probably for at least as much as 60-70% with the most conservative assumptions.
It is the same mechanism that would allow you to slightly improve theoretical calculations of the anomalous magnetic moment of the electron without renormalization issues (that was my starting point), or replicate all cross sections in QED/QFT. No renormalization issues... even for quantum gravity, because the mechanism should be applied to all force-mediating particles, including the graviton (if it actually exists).
One specific physical idea lays behind it, and some mathematical rules/tricks are there to follow, but apart from that, nothing too sophisticated, although this physical idea might not be as self-evident as one thinks it should. Clearly not one an AI will suggest.
Regards,
Jan Eidissen
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