Cold Dark Matter and Primordial Superheavy Particles

Grib, A. A.; Pavlov, Yu. V.

doi:10.1142/s0217751x02013514

Cited by 13 publications

(8 citation statements)

References 9 publications

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“…Similar ideas were considered later in [5]. The main argument in favor of this hypothesis is that was shown earlier in the work on the creation of particles from vacuum by the gravitational field of the early Universe in Friedmann cosmology [6] that the number of particles with such the mass is close to the observed number of Eddington-Dirac particles of protons in the Universe N = 10 80 . Therefore, the decay of such particles in the early Universe at high energies leads to an explanation of this number.…”

Section: Introductionsupporting

confidence: 55%

Graviatom of superheavy dark matter as a source of gravitational radiation

Misyura

Grib

2018

J. Phys.: Conf. Ser.

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Abstract. The nature of dark matter in modern physics is an important problem. Therefore, in this paper we consider a quantum system consisting of two identical particles. These particles are candidates for the role of dark matter. We will call them graviatoms and they could be formed in the early Universe. In this paper we have found the energy spectrum of the gravitatom from particles of dark matter, the Bohr radius, the intensity of gravitational radiation, the frequency of radiation, and the lifetime of a state. This lifetime is great for superheavy particles. Estimates of these values for different values of the masses of particles of dark matter are given.

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Section: Introductionsupporting

confidence: 55%

Graviatom of superheavy dark matter as a source of gravitational radiation

Misyura

Grib

2018

J. Phys.: Conf. Ser.

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“…The CDM is a successful paradigm accounting for the small density inhomogeneities that seed structure formations 10 −34 sec after the bang and as such provides a bold probe into the Early Universe [57]. Some other and recent works on CDM models are mentioned here though the list by no means is exhaustive [61][62][63][64][65][66].…”

Section: Introductionmentioning

confidence: 99%

Constraint on dark matter central density in the Eddington inspired Born-Infeld (EiBI) gravity with input from Weyl gravity

Potapov

Izmailov

Mikolaychuk

et al. 2015

J. Cosmol. Astropart. Phys.

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“…In fact, for a large enough entropy all momentum modes are present. Since the creation of superheavy particles in the early universe has important cosmological consequences [42][43][44][45], we can conclude also that creation of superheavy particles may be important in this case. On the other hand, in general when m 1, then S cr → 0.…”

Section: Interpretation Of Resultsmentioning

confidence: 99%

Entropy Production in the Expanding Universe

Farahmand

Mohammadzadeh

2017

The 4th International Electronic Conference on Entropy and Its Applications

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Abstract:The spacetime is basically curved and dynamical. Thus our knowledge of universe must be extended to a dynamical curved spacetime to understand the nature of the universe. The field theory in the curved spacetime has shown that the evolution of spacetime involving the field in the curved spacetime leads to particle creation. From another perspective, by employing thermodynamics to cosmology, we can learn about the source of current entropy content associated with the universe. From the quantum thermodynamics, it is clear that the inner friction stemming from the quantum fluctuations of the field can produce the entropy. Using this approach, the particle creation due to the expansion of spacetime beginning from the vacuum is shown as an entropic increase. Considering an asymptotically flat Robertson-Walker spacetime, the particle creation entropy is evaluated. Each special scale factor can be used to characterize the cosmic parameters. Thus, the dependence of particle creation entropy on the field parameters and the cosmic parameters allows us to recover information from the underlying structure of the spacetime. Also, by adding an entropy production, indicating the mutual information between created particle and spacetime, to this particle creation entropy, the well-known entanglement measure can obtained to investigate the entanglement of created particles. In fact, the entanglement entropy, measuring the mixedness of the primary state, is affected from the creation and the correlation of the particle.

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Cold Dark Matter and Primordial Superheavy Particles

Cited by 13 publications

References 9 publications

Graviatom of superheavy dark matter as a source of gravitational radiation

Graviatom of superheavy dark matter as a source of gravitational radiation

Constraint on dark matter central density in the Eddington inspired Born-Infeld (EiBI) gravity with input from Weyl gravity

Entropy Production in the Expanding Universe

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