Fermionic and scalar fields as sources of interacting dark matter-dark energy

Samuel Lepe; Javier Lorca; Francisco Peña; Yerko VÁsquez

doi:10.1142/S0218271811020500

Fermionic and scalar fields as sources of interacting dark matter-dark energy

Samuel Lepe, Javier Lorca, Francisco Peña, Yerko VÁsquez

INSTITUTE OF PHYSICS

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

From a variational action with nonminimal coupling with a scalar field and classical scalar and fermionic interaction, cosmological field equations can be obtained. Imposing a Friedmann-Lemaître-Robertson-Walker (FLRW) metric, the equations lead directly to a cosmological model consisting of two interacting fluids, where the scalar field fluid is interpreted as dark energy and the fermionic field fluid is interpreted as dark matter. Several cases were studied analytically and numerically. An important feature of the non-minimal coupling is that it allows crossing the barrier from a quintessence to phantom behavior. The insensitivity of the solutions to one of the parameters of the model permits it to find an almost analytical solution for the cosmological constant type of universe.

Original language	English
Pages (from-to)	2543-2558
Number of pages	16
Journal	International Journal of Modern Physics D
Volume	20
Issue number	13
DOIs	https://doi.org/10.1142/S0218271811020500
State	Published - 23 Dec 2011

Keywords

Cosmology
dark energy
fermions
nonminimal coupling
scalars

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10.1142/S0218271811020500

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title = "Fermionic and scalar fields as sources of interacting dark matter-dark energy",

abstract = "From a variational action with nonminimal coupling with a scalar field and classical scalar and fermionic interaction, cosmological field equations can be obtained. Imposing a Friedmann-Lema{\^i}tre-Robertson-Walker (FLRW) metric, the equations lead directly to a cosmological model consisting of two interacting fluids, where the scalar field fluid is interpreted as dark energy and the fermionic field fluid is interpreted as dark matter. Several cases were studied analytically and numerically. An important feature of the non-minimal coupling is that it allows crossing the barrier from a quintessence to phantom behavior. The insensitivity of the solutions to one of the parameters of the model permits it to find an almost analytical solution for the cosmological constant type of universe.",

keywords = "Cosmology, dark energy, fermions, nonminimal coupling, scalars",

author = "Samuel Lepe and Javier Lorca and Francisco Pe{\~n}a and Yerko V{\'A}squez",

note = "Funding Information: This research was supported by DIR01.11 037.334/2011 PUCV and Fondecyt 1110076 (SL), also DI10-0009 of Direcci{\'o}n de Investigaci{\'o}n y Desarrollo, Universi-dad de La Frontera (FP), and also by DI11-0071 (YV)",

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doi = "10.1142/S0218271811020500",

language = "English",

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T1 - Fermionic and scalar fields as sources of interacting dark matter-dark energy

AU - Lepe, Samuel

AU - Lorca, Javier

AU - Peña, Francisco

AU - VÁsquez, Yerko

N1 - Funding Information: This research was supported by DIR01.11 037.334/2011 PUCV and Fondecyt 1110076 (SL), also DI10-0009 of Dirección de Investigación y Desarrollo, Universi-dad de La Frontera (FP), and also by DI11-0071 (YV)

PY - 2011/12/23

Y1 - 2011/12/23

N2 - From a variational action with nonminimal coupling with a scalar field and classical scalar and fermionic interaction, cosmological field equations can be obtained. Imposing a Friedmann-Lemaître-Robertson-Walker (FLRW) metric, the equations lead directly to a cosmological model consisting of two interacting fluids, where the scalar field fluid is interpreted as dark energy and the fermionic field fluid is interpreted as dark matter. Several cases were studied analytically and numerically. An important feature of the non-minimal coupling is that it allows crossing the barrier from a quintessence to phantom behavior. The insensitivity of the solutions to one of the parameters of the model permits it to find an almost analytical solution for the cosmological constant type of universe.

AB - From a variational action with nonminimal coupling with a scalar field and classical scalar and fermionic interaction, cosmological field equations can be obtained. Imposing a Friedmann-Lemaître-Robertson-Walker (FLRW) metric, the equations lead directly to a cosmological model consisting of two interacting fluids, where the scalar field fluid is interpreted as dark energy and the fermionic field fluid is interpreted as dark matter. Several cases were studied analytically and numerically. An important feature of the non-minimal coupling is that it allows crossing the barrier from a quintessence to phantom behavior. The insensitivity of the solutions to one of the parameters of the model permits it to find an almost analytical solution for the cosmological constant type of universe.

KW - Cosmology

KW - dark energy

KW - fermions

KW - nonminimal coupling

KW - scalars

UR - http://www.scopus.com/inward/record.url?scp=84855381730&partnerID=8YFLogxK

U2 - 10.1142/S0218271811020500

DO - 10.1142/S0218271811020500

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SN - 0218-2718

VL - 20

SP - 2543

EP - 2558

JO - International Journal of Modern Physics D

JF - International Journal of Modern Physics D

IS - 13

ER -

Fermionic and scalar fields as sources of interacting dark matter-dark energy

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Keywords

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