Welcome to Xin Ren's Homepage

Hi, this is Xin Ren (任鑫), now a Joint Post-doctor at Tokyo Institute of Technology (Tokyo Tech).

Contact Details

Address: H187, Main Bldg, Department of Physics, Tokyo Institute of Technology,
Ookayama campus, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, JAPAN.
Telephone: +81-080-8125-9056
Email Address: ren.x.aa@m.titech.ac.jp

Resrarch experience

Mar.2023- Now

Joint post-doctor fellow
Theoretical Cosmology Group, Department of Physics
Tokyo Institute of Technology

Oct.2022- Now

Post-doctor
Department of Astronomy, School of Physical Sciences
University of Science and Technology of China

Education

2017.09- 2022.06

Ph.D in Astronomy
Department of Astronomy, School of Physical Sciences
University of Science and Technology of China

Major : Cosmology     the Particle Cosmology Group at USTC
Supervisor : Prof. Yi-Fu Cai

2013.08-2017.06

Bachelor of Sciences in Physics
Poling class of Physics
Nankai University

 Download CV

RESEARCH INTERESTS

My research interests include the exploration of the dynamical history of the universe, especially the dark energy models, modified gravity and the test of candidate theories on different scales.
My research interest focuses on the following topics:

1) Torsion gravity, non-metric gravity and modified gravity theory.
2) Dark energy models and dynamical history of the universe.
3) Use observational data to reconstruct or constrain the various theoretical models and distinguish different theories on different scales.

Publications

Please visit the INSPIRE for details

  1. Gaussian processes and effective field theory of f(T) gravity under the H0 tension

    2. Xin Ren, Sheng-Feng Yan, Yaqi Zhao, Emmanuel N. Saridakis, Yi-Fu Cai.
    Astrophys.J. 932 131. [arxiv:: 2203.01926 [astro-ph.CO]]

  2. Deflection angle and lensing signature of covariant f(T) gravity

    3. Xin Ren, Yaqi Zhao, Emmanuel N. Saridakis, Yi-Fu Cai.
    JCAP 10 (2021), 062 [arxiv:2105.04578 [astro-ph.CO]]

  3. Data-driven Reconstruction of the Late-time Cosmic Acceleration with f(T) Gravity

    4. Xin Ren, Thomas Hong Tsun Wong, Yi-Fu Cai, Emmanuel N. Saridakis.
    Phys.Dark Univ. 32 (2021), 100812. [arxiv:2103.01260 [astro-ph.CO]]

  4. Background-dependent and classical correspondences between f(Q) and f(T) gravity

    5. Cheng Wu, Xin Ren, Yuhang Yang, Yu-Min Hu, Emmanuel N. Saridakis.
    [arxiv:2412.01104 [gr-qc]]

  5. Observational test for f(Q) gravity with weak gravitational lensing

    6. Qingqing Wang, Xin Ren, Yi-Fu Cai, Wentao Luo, Emmanuel N. Saridakis.
    Astrophys.J. 974 (2024) 1, 7 [arxiv:2406.00242 [astro-ph.CO]]

  6. Testing Cotton gravity as dark matter substitute with weak lensing

    7. Geyu Mo, Qingqing Wang, Xin Ren, Weitong Yan, Yen Chin Ong et al.
    [arxiv:2405.07215 [astro-ph.CO]]

  7. Constrain the linear scalar perturbation theory of Cotton gravity

    8. Pengbo Xia, Dongdong Zhang, Xin Ren, Bo Wang, Yen Chin Ong.
    [arxiv:2405.07209 [astro-ph.CO]]

  8. Quintom cosmology and modified gravity after DESI 2024

    9. Yuhang Yang, Xin Ren, Qingqing Wang, Zhiyu Lu, Dongdong Zhang et al.
    Sci.Bull. 69 (2024) 2698-2704. [arxiv:2404.19437 [astro-ph.CO]]

  9. Data reconstruction of the dynamical connection function in f(Q) cosmology

    10. Yuhang Yang, Xin Ren, Bo Wang, Yi-Fu Cai, Emmanuel N. Saridakis.
    Mon.Not.Roy.Astron.Soc. 533 (2024) 2, 2232-2241. [arxiv:2404.12140 [astro-ph.CO]]

  10. Exploring f(T) gravity via strongly lensed fast radio

    11. Xinyue Jiang, Xin Ren, Zhao Li, Yi-Fu Cai, Xinzhong Er.
    Mon.Not.Roy.Astron.Soc. 528 (2024) 2, 1965-1978. [arxiv:2401.05464 [gr-qc]]

  11. Galaxy-galaxy lensing data: f(T) gravity challenges General Relativity

    12. Qingqing Wang, Xin Ren, Bo Wang, Yi-Fu Cai, Wentao Luo et al.
    Astrophys.J. 969 (2024) 2, 119. [arxiv:2312.17053 [astro-ph.CO]]

  12. The effective field theory approach to the strong coupling issue in f(T) gravity

    13. Yu-Min Hu, Yaqi Zhao, Xin Ren, Bo Wang, Emmanuel N. Saridakis et al.
    JCAP 07 (2023) 060. [arxiv:2302.03545[gr-qc]]

  13. Stochastic gravitational wave background from the collisions of dark matter halos

    14. Qiming Yan, Xin Ren, Yaqi Zhao, Emmanuel N. Saridakis.
    Eur.Phys.J.C 84 (2024) 1, 71. [arxiv:2301.02414 [astro-ph.CO]]

  14. Quasinormal modes of black holes in f(T) gravity

    15. Yaqi Zhao, Xin Ren, Amara Ilyas, Emmanuel N. Saridakis, Yi-Fu Cai.
    JCAP 10 (2022) 087. [arxiv:2204.11169 [gr-qc]]

  15. N-body simulations, halo mass functions, and halo density profile in f(T) gravity

    16. Yiqi Huang, Jiajun Zhang, Xin Ren,Emmanuel N. Saridakis, Yi-Fu Cai.
    Phys.Rev.D 106 (2022) 6, 064047. [arxiv:2204.06845 [astro-ph.CO]]

  16. Testing the equivalence principle via the shadow of black holes.

    17. Sheng-Feng Yan, Chunlong Li, Lingqin Xue, Xin Ren, Yi-Fu Cai et al.
    Phys.Rev.Res. 2 (2020) 2, 023164. [arxiv:1912.12629 [astro-ph.CO]]

  17. Implications of the possible 21-cm line excess at cosmic dawn on dynamics of interacting dark energy.

    18. Chunlong Li, Xin Ren, Martiros Khurshudyan, Yi-Fu Cai.
    Phys.Lett.B 801 (2020), 135141. [arxiv:1904.02458 [astro-ph.CO]]

Conferences/Talks

  • Oral presentation

    • 2024.09

    “Different branches in non-metricity gravity”
    IBS CTPU-CGA, Tokyo Tech, USTC 2024 summer school and workshop on cosmology, gravity, and particle physics, Tateyama, Japan

    2024.07

    “Quintom cosmology and modified gravity after DESI 2024”
    IBS CTPU-CGA 2024 Summer School and Workshop for Particle Physics and Cosmology in Korea, Muju, Korea

    2024.03

    “The Covariance in Teleparallel theory”
    Joint workshop on General Relativity and Cosmology 2024, Chiba, Japan

    2023.11

    “Spherically symmetric solution and lensing effects in covariant f(T) gravity”
    International Conference on Modified Gravity 2023, Wuhan, China

    2023.08

    “Spherically symmetric solution and lensing effects in covariant f(T) gravity”
    CAS-JSPS-IBS CTPU-CGA 2023 Summer Workshop on Cosmology, Gravity, Particle Physics, Sapporo, Japan

    2021.07

    “Data-driven Reconstruction of the Late-time Cosmic Acceleration with f(T) Gravity”
    Sixteenth Marcel Grossmann Meeting, Online

    2021.06

    “Spherically symmetric solutions in covariant and pure tetrad formulation of f(T) gravity - II”
    Workshop-Seminar: Covariance in Teleparallel Gravity, Online

    2021.04

    “Data-driven Reconstruction of the Late-time Cosmic Acceleration with f(T) Gravity”
    2021 CQU & USTC Junior Cosmology Symposium, Chongqing, China

    2019.11

    “Reconstruct the history of the universe in f(T) gravity through observational data”
    Autumn workshop on gravity and cosmology, Warsaw, Poland

    2019.08

    “21 cm line signal at cosmic dawn with Interacting dark energy”
    2019 Symposium on Frontiers in Theoretical Physics, Lanzhou, China

    2018.11

    “Cosmic dawn and running vacuum models”
    Zhuhai Cosmology Winter Workshop 2018, Zhuhai, China

  • Visiting Talks

    • 2024.07

    “General covariant formulation of torsion and non-metricity gravity”
    Institute for Basic Science CTPU-CGA, Daejeon, Korea

    2023.11

    “Data-driven reconstruction in teleparallel cosmology”
    Huazhong University of Science and Technology, Wuhan, China

    2023.11

    “f(T) gravity model and its application in cosmology”
    Institute of High Energy Physics of the Chinese Academy of Sciences, Beijing, China

      See More

    Relevant Experiences

    2024.07-2024.09

    Visiting at Institute for Basic Science CTPU-CGA group

    2017.09-2022.06

    Research assistant with Prof. Yi-Fu Cai, USTC

    2020 Fall

    Teaching Assistant of Space and Time (022172) with Prof. Yi-Fu Cai, USTC

    2019.10-2019.11

    Internship at Warsaw university with Prof. Chunshan Lin

    2016.01-2016.03

    Internship at University of Sydney with Prof. Geraint F. Lewis

    2015.06-2015.08

    Internship at Institute of Modern Physics, Chinese Academy of Sciences with Prof. Sergei Maydanyuk and Prof. Pengming Zhang

    2018.03

    Conference Volunteer of 2018 CfA@USTC Junior Cosmology Symposium: Gravitational Waves and Early Universe

    2019.07

    Volunteer of the first summer camp of astronomy Department of USTC

    Selected awards and honors

    Academic related

    2021

    PetroChina Scholarship

    2019-2022

    Doctoral First-class academic scholarship in USTC

    2017-2019

    Master's First-class academic scholarship in USTC

    2016-2017

    Merit student in Nankai University

    2015

    The Technical Institute of Physics and Chemistry, Chinese Academy of Sciences scholarship

    2017

    The 11th Nankai University Characteristic Dormitory "Learning Dormitory"

    2016

    The 10th Nankai University Characteristic Dormitory "Learning Dormitory"

    2015

    The 9th Nankai University Characteristic Dormitory "Learning Dormitory"

    Non-Academic related

    2018.12

    Team first prize of autumn Badminton competition of School of Physics, USTC

    2013.11

    Best Rookie team award in volleyball Option class competition, NKU

    • The most incomprehensible thing about the universe is that it is comprehensible

      —— Albert Einstein

    • Keep your eyes on the stars, and your feet on the ground.

      —— Theodore Roosevelt

    Friendly link

  • arXiv arXiv.org
  • INSPIRE inspirehep.net
  • Department of astronomy University of Science and Technology of China
  • Theoretical Cosmology Group Tokyo Institute of Technology
  • Cospa at USTC Particle Cosmology Group at USTC
  • CTPU-CGA Institute for Basic Science