89 citations · 264 across the 16 of their papers we have counts for
17 papers
Dark energy perturbations and the robustness of cosmological neutrino-mass constraints
Yu-Hang Yang, Emmanuel N. Saridakis, Yi-Fu Cai +1
Cosmological observations are placing increasingly stringent bounds on the sum of neutrino masses, approaching the lower limits implied by neutrino oscillation experiments. Recent…
A short review on Quintom dark energy theory
Xin Ren, Si-Yu Li, Yang Liu +3
In this paper, we provide a short review on the Quintom dark energy theory. Firstly, we discuss the No-Go theorem associated with dynamical dark energy, then present some examples…
Phantom crossing from the Standard Model and General Relativity
Jinglong Liu, Tucker Manton, Yifu Cai +1
Suggestions of a late-time phantom crossing from DESI baryon acoustic oscillation measurements, combined with cosmic microwave background and Type-Ia supernova observations, have r…
DESI and Dynamical Dark Energy from Extended Pre-geometric Gravity
Andrea Addazi, Yermek Aldabergenov, Daulet Berkimbayev +3
We consider the simplest quadratic extension of MacDowell--Mansouri pre-geometric gravity that preserves the topological pre-volume-form symmetry. Upon symmetry breaking, the theor…
Decoupling perturbations from background in gravity: the square-root correction and the impact on the tension
Chunyu Li, Xin Ren, Yuhang Yang +2
We investigate a perturbation-level modification of symmetric teleparallel gravity of the form and assess its potential to ease the tension. The square-…
Probing the sound speed and clustering of dark energy
Yuhang Yang, Qingqing Wang, Xin Ren +2
Recent Dark Energy Spectroscopic Instrument (DESI) observations favor a dynamical dark energy component with a time-varying equation-of-state, potentially crossing the cosmological…
The Quintom theory of dark energy after DESI DR2
Yifu Cai, Xin Ren, Taotao Qiu +2
Observations from DESI DR2 are challenging the CDM paradigm by suggesting that the equation-of-state parameter of dark energy evolves across , a phenomenon known as the…
Quantum Gravity Meets DESI: Dynamical Dark Energy in Light of the Trans-Planckian Censorship Conjecture
Chunyu Li, Junkai Wang, Dongdong Zhang +2
Recent DESI DR2 observations indicate that dark energy has crossed from phantom to quintessence regime, a behavior known as the quintom-B realization. In this work we constrain dyn…
Modified gravity realizations of quintom dark energy after DESI DR2
Yuhang Yang, Qingqing Wang, Xin Ren +2
We investigate the realization of quintom scenario for dynamical dark energy within modified gravity theories that can efficiently fit the recent observational datasets. Starting f…
Gaussian-process reconstructions and model building of quintom dark energy from latest cosmological observations
Yuhang Yang, Qingqing Wang, Chunyu Li +4
In this article we use the latest cosmological observations, including SNe, BAO, CC and RSD, to reconstruct the cosmological evolution via the Gaussian process. At the background l…
Lowering the strong coupling mode of modified teleparallel gravity theories
Yu-Min Hu, Bi-Chu Li, Yang Yu +3
We investigate the strong coupling problem in modified teleparallel gravity theories using the effective field theory (EFT) approach, demonstrating that it is possible to shift the…
Observational test for gravity with weak gravitational lensing
Qingqing Wang, Xin Ren, Yi-Fu Cai +2
In this article we confront a class of gravity models with observational data of galaxy-galaxy lensing. Specifically, we consider the gravity models containing a smal…
Quintom cosmology and modified gravity after DESI 2024
Yuhang Yang, Xin Ren, Qingqing Wang +4
We reconstruct the cosmological background evolution under the scenario of dynamical dark energy through the Gaussian process approach, using the latest Dark Energy Spectroscopic I…
Data reconstruction of the dynamical connection function in cosmology
Yuhang Yang, Xin Ren, Bo Wang +2
We employ Hubble data and Gaussian Processes in order to reconstruct the dynamical connection function in cosmology beyond the coincident gauge. In particular, there exist t…
Can we constrain warm dark matter masses with individual galaxies?
Shurui Lin, Francisco Villaescusa-Navarro, Jonah Rose +9
We study the impact of warm dark matter mass on the internal properties of individual galaxies using a large suite of 1,024 state-of-the-art cosmological hydrodynamic simulations f…
Exploring Gravity via strongly lensed fast radio bursts
Xinyue Jiang, Xin Ren, Zhao Li +2
This study aims to investigate the strong gravitational lensing effects in gravity. We present the theoretical analytic expressions for the lensing effects in gravity…
Galaxy-galaxy lensing data: gravity challenges General Relativity
Qingqing Wang, Xin Ren, Bo Wang +3
We use galaxy-galaxy lensing data to test General Relativity and gravity at galaxies scales. We consider an exact spherically symmetric solution of theory which is ob…