Dark energy from αattractors: phenomenology and observational constraints
Abstract
The possibility of linking inflation and late cosmic accelerated expansion using the $$\alpha$$attractor models has received increasing attention due to their physical motivation. In the early universe, $$\alpha$$attractors provide an inflationary mechanism compatible with Planck satellite CMB observations and predictive for future gravitational wave CMB modes. Additionally $$\alpha$$attractors can be written as quintessence models with a potential that connects a power law regime with a plateau or uplifted exponential, allowing a late cosmic accelerated expansion that can mimic behavior near a cosmological constant. In this paper we study a generalized dark energy $$\alpha$$attractor model. We thoroughly investigate its phenomenology, including the role of all model parameters and the possibility of largescale tachyonic instability clustering. We confirm the relation that $$1+w\sim 1/\alpha$$ (while the gravitational wave power $$r\sim\alpha$$) so these models predict that a signature should appear in either the primordial Bmodes or in late time deviation from a cosmological constant. We constrain the model parameters with current datasets, including the cosmic microwave background (Planck 2015 angular power spectrum, polarization and lensing), baryon acoustic oscillations (BOSS DR12) and supernovae (Pantheon compressed). Our findings demonstrate that expansion histories close to a cosmological constant exist in large regions of the parameter space, not requiring a finetuning of the parameters or initial conditions.
 Authors:

 Consejo Superior de Investigaciones Cientificas (CSIC), Madrid (Spain); Institut de Ciencies del Cosmos (UBIEEC), Barcelona (Spain)
 Univ. of California, Berkeley, CA (United States); Nazarbayev Univ., Astana (Kazakhstan)
 Univ. of California, Berkeley, CA (United States); Univ. ParisSaclay, GifsurYvette (France)
 Publication Date:
 Research Org.:
 Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), High Energy Physics (HEP); Ministry of Industry, Science and Innovation of Spain
 OSTI Identifier:
 1542391
 Grant/Contract Number:
 AC0205CH11231; SC0007867; BES2016077038
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Journal of Cosmology and Astroparticle Physics
 Additional Journal Information:
 Journal Volume: 2018; Journal Issue: 08; Journal ID: ISSN 14757516
 Publisher:
 Institute of Physics (IOP)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
GarcíaGarcía, Carlos, Linder, Eric V., RuízLapuente, Pilar, and Zumalacárregui, Miguel. Dark energy from αattractors: phenomenology and observational constraints. United States: N. p., 2018.
Web. doi:10.1088/14757516/2018/08/022.
GarcíaGarcía, Carlos, Linder, Eric V., RuízLapuente, Pilar, & Zumalacárregui, Miguel. Dark energy from αattractors: phenomenology and observational constraints. United States. https://doi.org/10.1088/14757516/2018/08/022
GarcíaGarcía, Carlos, Linder, Eric V., RuízLapuente, Pilar, and Zumalacárregui, Miguel. Fri .
"Dark energy from αattractors: phenomenology and observational constraints". United States. https://doi.org/10.1088/14757516/2018/08/022. https://www.osti.gov/servlets/purl/1542391.
@article{osti_1542391,
title = {Dark energy from αattractors: phenomenology and observational constraints},
author = {GarcíaGarcía, Carlos and Linder, Eric V. and RuízLapuente, Pilar and Zumalacárregui, Miguel},
abstractNote = {The possibility of linking inflation and late cosmic accelerated expansion using the $\alpha$attractor models has received increasing attention due to their physical motivation. In the early universe, $\alpha$attractors provide an inflationary mechanism compatible with Planck satellite CMB observations and predictive for future gravitational wave CMB modes. Additionally $\alpha$attractors can be written as quintessence models with a potential that connects a power law regime with a plateau or uplifted exponential, allowing a late cosmic accelerated expansion that can mimic behavior near a cosmological constant. In this paper we study a generalized dark energy $\alpha$attractor model. We thoroughly investigate its phenomenology, including the role of all model parameters and the possibility of largescale tachyonic instability clustering. We confirm the relation that $1+w\sim 1/\alpha$ (while the gravitational wave power $r\sim\alpha$) so these models predict that a signature should appear in either the primordial Bmodes or in late time deviation from a cosmological constant. We constrain the model parameters with current datasets, including the cosmic microwave background (Planck 2015 angular power spectrum, polarization and lensing), baryon acoustic oscillations (BOSS DR12) and supernovae (Pantheon compressed). Our findings demonstrate that expansion histories close to a cosmological constant exist in large regions of the parameter space, not requiring a finetuning of the parameters or initial conditions.},
doi = {10.1088/14757516/2018/08/022},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 08,
volume = 2018,
place = {United States},
year = {2018},
month = {8}
}
Web of Science
Figures / Tables:
Works referenced in this record:
Unity of Cosmological Inflation Attractors
journal, April 2015
 Galante, Mario; Kallosh, Renata; Linde, Andrei
 Physical Review Letters, Vol. 114, Issue 14
NINEYEAR WILKINSON MICROWAVE ANISOTROPY PROBE ( WMAP ) OBSERVATIONS: COSMOLOGICAL PARAMETER RESULTS
journal, September 2013
 Hinshaw, G.; Larson, D.; Komatsu, E.
 The Astrophysical Journal Supplement Series, Vol. 208, Issue 2
Planck 2015 results : XX. Constraints on inflation
journal, September 2016
 Ade, P. A. R.; Aghanim, N.; Arnaud, M.
 Astronomy & Astrophysics, Vol. 594
Universality class in conformal inflation
journal, July 2013
 Kallosh, Renata; Linde, Andrei
 Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 07
Quintessential inflation with αattractors
journal, June 2017
 Dimopoulos, Konstantinos; Owen, Charlotte
 Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 06
Instant preheating in quintessential inflation with α attractors
journal, March 2018
 Dimopoulos, Konstantinos; Wood, Leonora Donaldson; Owen, Charlotte
 Physical Review D, Vol. 97, Issue 6
Dark energy, αattractors, and largescale structure surveys
journal, June 2018
 Akrami, Yashar; Kallosh, Renata; Linde, Andrei
 Journal of Cosmology and Astroparticle Physics, Vol. 2018, Issue 06
Higgsdilaton cosmology: An inflation–darkenergy connection and forecasts for future galaxy surveys
journal, February 2018
 Casas, Santiago; Pauly, Martin; Rubio, Javier
 Physical Review D, Vol. 97, Issue 4
Dark energy from α attractors
journal, June 2015
 Linder, Eric V.
 Physical Review D, Vol. 91, Issue 12
Observational constraints on the generalized α attractor model
journal, April 2018
 Shahalam, M.; Myrzakulov, Ratbay; Myrzakul, Shynaray
 International Journal of Modern Physics D, Vol. 27, Issue 05
Sourcing dark matter and dark energy from αattractors
journal, June 2017
 Mishra, Swagat S.; Sahni, Varun; Shtanov, Yuri
 Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 06
A new type of isotropic cosmological models without singularity
journal, March 1980
 Starobinsky, A. A.
 Physics Letters B, Vol. 91, Issue 1
Inflationary α attractors from F ( R ) gravity
journal, December 2016
 Odintsov, S. D.; Oikonomou, V. K.
 Physical Review D, Vol. 94, Issue 12
Reconstructing a f ( R ) theory from the αAttractors
journal, September 2017
 Miranda, T.; Fabris, J. C.; Piattella, O. F.
 Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 09
Planck 2015 results : XIV. Dark energy and modified gravity
journal, September 2016
 Ade, P. A. R.; Aghanim, N.; Arnaud, M.
 Astronomy & Astrophysics, Vol. 594
The clustering of galaxies in the completed SDSSIII Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
journal, March 2017
 Alam, Shadab; Ata, Metin; Bailey, Stephen
 Monthly Notices of the Royal Astronomical Society, Vol. 470, Issue 3
Type Ia Supernova Distances at Redshift >1.5 from the Hubble Space Telescope Multicycle Treasury Programs: The Early Expansion Rate
journal, January 2018
 Riess, Adam G.; Rodney, Steven A.; Scolnic, Daniel M.
 The Astrophysical Journal, Vol. 853, Issue 2
Fourthorder gravity as general relativity plus matter
journal, September 1984
 Whitt, Brian
 Physics Letters B, Vol. 145, Issue 34
Inflation as a transient attractor in ${R}^{2}$ cosmology
journal, February 1988
 Maeda, Keiichi
 Physical Review D, Vol. 37, Issue 4
The premature recollapse problem in closed inflationary universes
journal, January 1988
 Barrow, John D.
 Nuclear Physics B, Vol. 296, Issue 3
The Cosmic Linear Anisotropy Solving System (CLASS). Part II: Approximation schemes
journal, July 2011
 Blas, Diego; Lesgourgues, Julien; Tram, Thomas
 Journal of Cosmology and Astroparticle Physics, Vol. 2011, Issue 07
hi_class: Horndeski in the Cosmic Linear Anisotropy Solving System
journal, August 2017
 Zumalacárregui, Miguel; Bellini, Emilio; Sawicki, Ignacy
 Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 08
Field flows of dark energy
journal, November 2008
 Cahn, Robert N.; de Putter, Roland; Linder, Eric V.
 Journal of Cosmology and Astroparticle Physics, Vol. 2008, Issue 11
The Complete Lightcurve Sample of Spectroscopically Confirmed SNe Ia from PanSTARRS1 and Cosmological Constraints from the Combined Pantheon Sample
journal, May 2018
 Scolnic, D. M.; Jones, D. O.; Rest, A.
 The Astrophysical Journal, Vol. 859, Issue 2
Baryon acoustic oscillations in the Ly α forest of BOSS DR11 quasars
journal, January 2015
 Delubac, Timothée; Bautista, Julian E.; Busca, Nicolás G.
 Astronomy & Astrophysics, Vol. 574
Isolating the Lyman alpha forest BAO anomaly
journal, April 2017
 Evslin, Jarah
 Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 04
Conservative constraints on early cosmology with M ONTE P YTHON
journal, February 2013
 Audren, Benjamin; Lesgourgues, Julien; Benabed, Karim
 Journal of Cosmology and Astroparticle Physics, Vol. 2013, Issue 02
emcee : The MCMC Hammer
journal, March 2013
 ForemanMackey, Daniel; Hogg, David W.; Lang, Dustin
 Publications of the Astronomical Society of the Pacific, Vol. 125, Issue 925
Ensemble samplers with affine invariance
journal, January 2010
 Goodman, Jonathan; Weare, Jonathan
 Communications in Applied Mathematics and Computational Science, Vol. 5, Issue 1
Planck 2015 results : XIII. Cosmological parameters
journal, September 2016
 Ade, P. A. R.; Aghanim, N.; Arnaud, M.
 Astronomy & Astrophysics, Vol. 594
A new look at the statistical model identification
journal, December 1974
 Akaike, H.
 IEEE Transactions on Automatic Control, Vol. 19, Issue 6
Estimating the Dimension of a Model
journal, March 1978
 Schwarz, Gideon
 The Annals of Statistics, Vol. 6, Issue 2
Cosmology and fundamental physics with the Euclid satellite
journal, April 2018
 Amendola, Luca; Appleby, Stephen; Avgoustidis, Anastasios
 Living Reviews in Relativity, Vol. 21, Issue 1
Planck 2015 results : XXIII. The thermal SunyaevZeldovich effectcosmic infrared background correlation
journal, September 2016
 Ade, P. A. R.; Aghanim, N.; Arnaud, M.
 Astronomy & Astrophysics, Vol. 594
Friendship stability in adolescence is associated with ventral striatum responses to vicarious rewards
journal, January 2021
 Schreuders, Elisabeth; Braams, Barbara R.; Crone, Eveline A.
 Nature Communications, Vol. 12, Issue 1
Skillful statistical models to predict seasonal wind speed and solar radiation in a Yangtze River estuary case study
journal, May 2020
 Zeng, Peng; Sun, Xun; Farnham, David J.
 Scientific Reports, Vol. 10, Issue 1
Cosmology and Fundamental Physics with the Euclid Satellite
journal, September 2013
 Amendola, Luca; Appleby, Stephen; Bacon, David
 Living Reviews in Relativity, Vol. 16, Issue 1
Planck 2015 results : VI. LFI mapmaking
journal, September 2016
 Ade, P. A. R.; Aghanim, N.; Ashdown, M.
 Astronomy & Astrophysics, Vol. 594
Planck 2015 results : X. Diffuse component separation: Foreground maps
journal, September 2016
 Adam, R.; Ade, P. A. R.; Aghanim, N.
 Astronomy & Astrophysics, Vol. 594
Cosmology and fundamental physics with the Euclid satellite
text, January 2018
 Amendola, Luca; Appleby, Stephen; Avgoustidis, Anastasios
 ETH Zurich
Planck 2015 results : XVI. Isotropy and statistics of the CMB
journal, September 2016
 Ade, P. A. R.; Aghanim, N.; Akrami, Y.
 Astronomy & Astrophysics, Vol. 594
Planck 2015 results : XXVI. The Second
journal, September 2016
 Ade, P. A. R.; Aghanim, N.; Argüeso, F.
 Astronomy & Astrophysics, Vol. 594
Planck 2015 results: XX. Constraints on inflation
text, January 2016
 Ade, Par; Aghanim, N.; Arnaud, M.
 Apollo  University of Cambridge Repository
Field Flows of Dark Energy
text, January 2008
 Cahn, Robert N.; de Putter, Roland; Linder, Eric V.
 arXiv
The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
text, January 2011
 Blas, Diego; Lesgourgues, Julien; Tram, Thomas
 arXiv
Cosmology and fundamental physics with the Euclid satellite
text, January 2012
 Amendola, Luca; Appleby, Stephen; Bacon, David
 arXiv
Planck 2015 results. XIII. Cosmological parameters
text, January 2015
 Collaboration, Planck; Ade, P. A. R.; Aghanim, N.
 arXiv
Planck 2015 results. XIV. Dark energy and modified gravity
text, January 2015
 Collaboration, Planck; Ade, P. A. R.; Aghanim, N.
 arXiv
hi_class: Horndeski in the Cosmic Linear Anisotropy Solving System
text, January 2016
 Zumalacarregui, Miguel; Bellini, Emilio; Sawicki, Ignacy
 arXiv
Isolating the Lyman alpha forest BAO anomaly
journal, April 2017
 Evslin, Jarah
 Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 04
Conservative Constraints on Early Cosmology: an illustration of the Monte Python cosmological parameter inference code
text, January 2012
 Audren, Benjamin; Lesgourgues, Julien; Benabed, Karim
 arXiv
Works referencing / citing this record:
Gravitational waves from global cosmic strings in quintessential inflation
journal, February 2019
 Bettoni, Dario; Doménech, Guillem; Rubio, Javier
 Journal of Cosmology and Astroparticle Physics, Vol. 2019, Issue 02
Gravitational waves from global cosmic strings in quintessential inflation
text, January 2018
 Bettoni, Dario; Domènech, Guillem; Rubio, Javier
 arXiv
Figures / Tables found in this record: