Anisotropic cosmological models with spinor and scalar fields and viscous fluid in presence of a Λ term: Qualitative solutions

Saha, Bijan; Rikhvitsky, Victor

doi:10.1063/1.3005642

Cited by 8 publications

(6 citation statements)

References 20 publications

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“…Two last quantities in ( 9), ω and , can be indicated as crossinvariant and cross -pseudoinvariant, respectively, since they contain quantities, which characterize both the aether flow and spinor field. Let us mention that in many aspects we follow the approach presented in the series of works [40][41][42][43][44]; the authors of these works have focused on the coupling of the scalar and spinor fields via the kinetic term ∇ k ϕ∇ k ϕ • F(S, P, . .…”

Section: The Structure Of the Potential Of The Axion Fieldmentioning

confidence: 99%

“…There are examples of investigations of the triple interactions: for instance, in the work [37] the coupling between spinor, axion and scalar fields is studied; in the papers [38,39] the coupling between aether, axions and photons is considered; in the works [40][41][42] the spinor and scalar fields are considered to be coupled to the fluids (perfect, viscous, magnetized). In some works the spinor field is presented in terms of the nonlinear and nonminimal formalisms (see, e.g., [43,44]).…”

Section: Introductionmentioning

confidence: 99%

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Interaction of the axionic dark matter, dynamic aether, spinor and gravity fields as an origin of oscillations of the fermion effective mass

Balakin

Efremova

2021

Eur. Phys. J. C

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In the framework of the Einstein–Dirac-axion-aether theory we consider the quartet of self-interacting cosmic fields, which includes the dynamic aether, presented by the unit timelike vector field, the axionic dark mater, described by the pseudoscalar field, the spinor field associated with fermion particles, and the gravity field. The key, associated with the mechanism of self-interaction, is installed into the modified periodic potential of the pseudoscalar (axion) field constructed on the base of a guiding function, which depends on one invariant, one pseudo-invariant and two cross-invariants containing the spinor and vector fields. The total system of the field equations related to the isotropic homogeneous cosmological model is solved; we have found the exact solutions for the guiding function for three cases: nonzero, vanishing and critical values of the cosmological constant. Based on these solutions, we obtained the expressions for the effective mass of spinor particles, interacting with the axionic dark matter and dynamic aether. This effective mass is shown to bear imprints of the cosmological epoch and of the state of the cosmic dark fluid in that epoch.

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Section: The Structure Of the Potential Of The Axion Fieldmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interaction of the axionic dark matter, dynamic aether, spinor and gravity fields as an origin of oscillations of the fermion effective mass

Balakin

Efremova

2021

Eur. Phys. J. C

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“…In this consideration, authors obtained the oscillatory mode of expansion of the universe for some special choice of spinor field nonlinearity [3]. Also, in similar paper, the evolution of the volume scale of universe, energy density and corresponding Hubble constant has been derived [4]. In one scenario, the effect of magneto-fluid on the interacting scalar and spinor fields in Bianchi type I universe was investigated [5].…”

Section: Introductionmentioning

confidence: 95%

“…In this model, the expansion of universe is controlled by the spinor field. Until now, the spinor inflationary Universe has been discussed in many papers [2][3][4][5][6][7]. For example, some authors considered a system of interacting spinor and scalar fields in a gravitational field given by a Bianchi type-I cosmological model.…”

Section: Introductionmentioning

confidence: 99%

Bianchi Type I Cosmology with Scalar and Spinor Tachyon

2014

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Recently, some authors propose a scenario where inflation is driven by scalar and spinor fields. In this scenario, the universe undergoes anisotropic inflationary expansion due to a preferred direction dominated by spinor. The main question arises that what is the origin of spinor inflation in 4D Universe? To answer to this question , we propose a new model in super string theory that allows to take into account the spinor string tachyon in additional to scalar one which stretch between branes and antibranes. In this model, the inflation of 4D Universe is controlled by the spinor type of tachyon and evolves from nonphantom phase to phantom one and consequently, phantom-dominated era of the universe accelerates and ends up in big-rip singularity. We test our model against WMAP and Planck data and obtain the ripping time. We find that the finite time that Big Rip singularity occurs is t = 65(Gyr). According to our calculations, N 60 case leads to n s 0.96, where N and n s are the number e-folds and the spectral index respectively. Thus our results are consistent with experimental data and thus the spinor inflationary model works.

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“…There are examples of investigations of the triple interactions: for instance, in the work [36] the coupling between spinor, axion and scalar fields is studied; in the papers [37,38] the coupling between aether, axions and photons is considered; in the works [39][40][41] the spinor and scalar fields are considered to be coupled to the fluids (perfect, viscous, magnetized). In some works the spinor field is presented in terms of the nonlinear and nonminimal formalisms (see, e.g., [42,43]).…”

Section: Introductionmentioning

confidence: 99%

Interaction of the axionic dark matter, dynamic aether, spinor and gravity fields as an origin of oscillations of the fermion effective mass

Balakin,

Efremova

2021

Preprint

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In the framework of the Einstein-Dirac-axion-aether theory we consider the quartet of selfinteracting cosmic fields, which includes the dynamic aether, presented by the unit timelike vector field, the axionic dark mater, described by the pseudoscalar field, the spinor field associated with fermion particles, and the gravity field. The key, associated with the mechanism of self-interaction, is installed into the modified periodic potential of the pseudoscalar (axion) field constructed on the base of a guiding function, which depends on one invariant, one pseudo-invariant and two crossinvariants containing the spinor and vector fields. The total system of master equations related to the isotropic homogeneous cosmological model is solved; we have found the exact solutions for the guiding function for three cases: nonzero, vanishing and critical values of the cosmological constant. Based on these solutions, we obtained the expressions for the effective mass of spinor particles, interacting with the axionic dark matter and dynamic aether. This effective mass is shown to bear imprints of the cosmological epoch and of the state of the cosmic dark fluid in that epoch.

show abstract

Anisotropic cosmological models with spinor and scalar fields and viscous fluid in presence of a Λ term: Qualitative solutions

Cited by 8 publications

References 20 publications

Interaction of the axionic dark matter, dynamic aether, spinor and gravity fields as an origin of oscillations of the fermion effective mass

Interaction of the axionic dark matter, dynamic aether, spinor and gravity fields as an origin of oscillations of the fermion effective mass

Bianchi Type I Cosmology with Scalar and Spinor Tachyon

Interaction of the axionic dark matter, dynamic aether, spinor and gravity fields as an origin of oscillations of the fermion effective mass

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