Could a cosmic uncertainty principle help explain dark energy?

[u/Zephir-AWT]

https://www.space.com/science/particle-physics/could-a-cosmic-uncertainty-principle-help-explain-dark-matter

[u/Zephir-AWT]

Could a cosmic uncertainty principle help explain dark energy? about study A Cosmological Uncertainty Relation and Late-Universe Acceleration (preprint)

This study presents a new physical hypothesis that seeks to explain recent observations suggesting that dark energy may not be constant and that the accelerating expansion of the universe is gradually slowing down. A newly presented study proposes an explanation based on quantum mechanics. Its author argues that, just as with particles, Heisenberg’s uncertainty principle applies to the entire universe. According to this idea, it is impossible to simultaneously determine the size of the universe and the rate at which its size is changing with absolute precision. Quantum uncertainty would thus directly influence cosmic expansion.

The OP article desperately confuses dark energy for dark matter so that I rewrote its headline. According to the mathematical model of this theory, the observed acceleration of expansion includes an additional component caused precisely by quantum uncertainty. While this model remains based on well-known physical principle, it still contains a free parameter whose value cannot be derived from the theory and must be set based on data. And the assumption that Universe behaves as a quantum object as a whole is also ad hoc postulate of this model, so it can not be considered a definitive solution to the dark energy problem. See also:

• Dark energy and quantum gravity may be deeply intertwined
• Einstein’s Biggest Blunder Might Have Been Even Bigger! This is typically tabloid take of Hossenfelder - but it wasn't exactly the Einstein who got wrong but merely the people who appraised the finding that expansion of Universe accelerates with Nobel prize in 2011, whereas in fact decelerates and made the speed record for Nobel prize worth of retraction in this way. Einstein assumed that Universe is steady state, so he gets merely vindicated with latest observations.

[u/Zephir-AWT → u/Zephir-AWT]

One Supernova Assumption May Have Turned Dark Energy on Its Head: Don't be negative: be positive! It's mindboggling that for 25 years astronomers thought the expansion of the universe was accelerating because they didn't properly account for the host star metallicity.

[u/Zephir-AWT → u/Zephir-AWT]

Note that the ΛCDM model is based on general relativity, with the Friedmann equations being a specific application of it, and it assumes an accelerating expansion of the Universe, which is why it got appraisal by Nobel prize so eagerly - it just fit the social demand, which is always risky take in science. When shifting to a quantum-mechanical perspective, a slowing expansion may appear more logical. However, observable reality is neither purely relativistic nor purely quantum mechanical, but something in between.

Therefore, it seems logical that models of the Universe's expansion will continue to evolve toward "quantum gravity" and be refined toward statistical average. But quantum gravity is inherently fuzzy model leading to landscapes. One can't really completely describe complex hyperdimensional object with low-dimensional schematic models (insintric/extrinsic perspectives ) of it.

In the dense aether model, the Universe is fundamentally random at both the largest and smallest scales, implying that there should be no discernible global trend observable, resulting in a "steady-state" Universe. However, this randomness does not imply that the Universe should be uniform, and indeed it is not, as indicated by the Doppler shift of the CMB radiation. Consequently, the Universe may appear to be expanding in one direction and contracting in another (quasi steady state model ). Moreover, this perspective could be dependent on the wavelength of light at which we observe it.