Quintom cosmology and modified gravity after DESI 2024

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外文摘要：We reconstruct the cosmological background evolution under the scenario of dynamical dark energy through the Gaussian process approach,using the latest Dark Energy Spectroscopic Instrument(DESI)bar-yon acoustic oscillations(BAO)combined with other observations.Our results reveal that the recon-structed dark-energy equation-of-state(EoS)parameter w(z)exhibits the so-called quintom-B behavior,crossing-1 from phantom to quintessence regime as the universe expands.We investigate under what sit-uation this type of evolution could be achieved from the perspectives of field theories and modified gravity.In particular,we reconstruct the corresponding actions forf(R),f(T),and f(Q)gravity,respectively.We explicitly show that,certain modified gravity can exhibit the quintom dynamics and fit the recent DESI data efficiently,and for all cases the quadratic deviation from the ACDM scenario is mildly favored.

外文关键词：

DESIDark energyQuintom cosmologyModified gravity

作者：

Yuhang Yang、Xin Ren、Qingqing Wang、Zhiyu Lu、Dongdong Zhang、Yi-Fu Cai、Emmanuel N.Saridakis

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作者单位：

Department of Astronomy,School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China

CAS Key Laboratory for Researches in Galaxies and Cosmology,School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China

Deep Space Exploration Laboratory,Hefei 230088,China

Department of Physics,Tokyo Institute of Technology,Tokyo 152-8551,Japan

Kavli IPMU(WPI),UTIAS,The University of Tokyo,Chiba 277-8583,Japan

National Observatory of Athens,Lofos Nymfon 11852,Greece

Departamento de Matemáticas,Universidad Católica del Norte,Antofagasta 1270398,Chile

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基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaCAS young interdisciplinary innovation team111 ProjectUSTC Fellowship for International CooperationUSTC Research Funds of the Double First-Class InitiativeLISA CosWGCOST Actions&&World Premier International Research Center Initiative(WPI),MEXT,Japan

项目编号：

2021YFC22031001226113149712003029JCTD-2022-20B23042CA18108CA21136

出版年：

2024

DOI：

10.1016/j.scib.2024.07.029

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

年,卷(期)：2024.69(17)