Cosmology of Quantum Gravities

Calcagni, Gianluca

doi:10.1007/978-3-319-41127-9_11

Cited by 4 publications

(4 citation statements)

References 427 publications

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“…There are still many wrinkles to this proposal, not least because some studies have shown that, contrary to initial expectations, the theory might not single out a unique wavefunction for the Universe 5,6 . But studies in quantum foundations -research that is mostly independent from that of quantum cosmology -could offer yet another for implementing strong determinism.…”

Section: A Universal Wavefunctionmentioning

confidence: 90%

Does quantum theory imply the entire Universe is preordained?

Chen

2023

Nature

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Was there ever any choice in the Universe being as it is? Albert Einstein could have been wondering about this when he remarked to mathematician Ernst Strauss: "What I'm really interested in is whether God could have made the world in a different way; that is, whether the necessity of logical simplicity leaves any freedom at all."US physicist James Hartle, who died earlier this year aged 83, made seminal contributions to this continuing debate. Early in the twentieth century, the advent of quantum theory seemed to have blown out of the water ideas from classical physics that the evolution of the Universe is 'deterministic'. Is cosmic evolution a single track with no choice about the destination?GETTY

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Section: A Universal Wavefunctionmentioning

confidence: 90%

Does quantum theory imply the entire Universe is preordained?

Chen

2023

Nature

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“…Readers are encouraged to go through. We would like to emphasize that, in a quantum mechanical and quantum gravitational [20] picture, 1. Without Spin there is no existence to quantum mechanics.…”

Section: Hubble's Law and Its Possible Applicability To Cosmic Rotationmentioning

confidence: 99%

Energy Based True Definition of Cosmic Red Shift and Quantum Halt of the Current Universe Having Light Speed Rotation

U.V¹,

Lakshminarayana²

2023

Preprint

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We appeal the science community to review the basic definition of wavelength dependent cosmic red shift. We would like to emphasize the point that, the true cosmic red shift must be defined as the ratio of loss in energy of photon to the energy of photon at galaxy. In terms of wavelength, photon red shift must be defined as the ratio of change in wavelength to the observed wavelength of photon. Considering the recent paper pertaining to cosmic halt authored by Cosmin Andrei, Anna Ijjas, and Paul J. Steinhardt and reviewed by Saul Perlmutter, in this paper we propose a very simple model of the universe having early stage light speed expansion and current stage quantum halt accompanied by light speed rotation. In this context, representing early cosmic expansion and rotation as an outward spiral, it seems possible to consider Hubble’s law as a representation of current cosmic rotation having no further expansion. To understand the current cosmic halt, we are proposing very simple and very strange atomic and nuclear relations that constitute Hubble parameter and gravitational constant. It needs further study, observations and analysis.

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“…With the expansion of the Universe, the temperature went down until the first (neutral) atoms could form, namely hydrogen ones, and radiation could travel across the whole Universe under the form of what is now called the CMB, or cosmic microwave background radiation (formerly also called CBR, cosmic background radiation). Some useful references where this process is described in detail are [110][111][112][113][114][115][116][117][118][119][120].…”

Section: The Hot Big Bang Modelmentioning

confidence: 99%

“All That Matter ... in One Big Bang ...,” & Other Cosmological Singularities

Elizalde¹

2018

Preprint

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Abstract:The first part of this paper contains a brief description of the beginnings of modern cosmology, which, the author will argue, was most likely born in the year 1912. Some of the pieces of evidence presented here have emerged from recent research in the history of science and are not usually shared with the general audiences in popular science books. In particular, the issue of the correct formulation of the original Big Bang concept, according to the precise words of Fred Hoyle, is discussed. Too often, this point is very deficiently explained (when not just misleadingly) in most of the available generalist literature. Other frequent uses of the same words, Big Bang, as to name the initial singularity of the cosmos, and also whole cosmological models, are then addressed, as evolutions of its original meaning. Quantum and inflationary additions to the celebrated singularity theorems by Penrose, Geroch, Hawking and others led to subsequent results by Borde, Guth and Vilenkin. Additionally, corresponding corrections to the Einstein field equations have originated, in particular, R 2 , f (R), and scalar-tensor gravities, giving rise to a plethora of new singularities. For completeness, an updated table with a classification of the same is given.

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Cosmology of Quantum Gravities

Cited by 4 publications

References 427 publications

Does quantum theory imply the entire Universe is preordained?

Does quantum theory imply the entire Universe is preordained?

Energy Based True Definition of Cosmic Red Shift and Quantum Halt of the Current Universe Having Light Speed Rotation

“All That Matter ... in One Big Bang ...,” & Other Cosmological Singularities

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Cosmology of Quantum Gravities

Cited by 4 publications

References 427 publications

Does quantum theory imply the entire Universe is preordained?

Does quantum theory imply the entire Universe is preordained?

Energy Based True Definition of Cosmic Red Shift and Quantum Halt of the Current Universe Having Light Speed Rotation

&ldquo;All That Matter ... in One Big Bang ...,&rdquo; &amp; Other Cosmological Singularities

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Product

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“All That Matter ... in One Big Bang ...,” & Other Cosmological Singularities