Faculty

Zhong-Zhi Xianyu  Associate Professor

Tel:8610-62772693

Fax:8610-62781604

Email address:zxianyu@tsinghua.edu.cn

Webpage:https://zzxianyu.com

Blog:https://xianyuzhongzhi.wordpress.com

Address:New Science Building A226,Tsinghua University,Beijing 100084

Bibliography Sketch

Education:

· 2006-2010   Tsinghua University   Bachelor of science

· 2010-2015   Tsinghua University   Ph. D. of physics

Employment:

· 2015-2020   Harvard University    Postdoc

· 2020-2022   Tsinghua University   Assistant Professor

· 2022 to now  Tsinghua University   Associate Professor

Teaching

Feynman Physics (3) (For undergraduate students) (from 2023 to now)

Theoretical Topics in Particle Cosmology (from 2022 to now)

Research

I work on theoretical particle physics, cosmology, and astrophysics. My recent interests include cosmological collider physics, quantum field theory and amplitude techniques in de Sitter space, gravitational wave (GW) astronomy, and new physics from early-universe cosmology and astrophysical systems.

Selected Publications

1Bingchu Fan, Zhong-Zhi Xianyu, “Cosmological Amplitudes in Power-Law FRW Universe,” arXiv: 2403.07050 [hep-th].

2Zhong-Zhi Xianyu, Jiaju Zang, “Inflation Correlators with Multiple Massive Exchanges,” JHEP 03 (2024) 070 [arXiv: 2309.10849 [hep-th]].

3Zhehan Qin, Zhong-Zhi Xianyu, “Nonanalyticity and On-Shell Factorization of Inflation Correlators at All Loop Orders,” JHEP 01 (2024) 168 [arXiv: 2308.14802 [hep-th]].

4Zhehan Qin, Zhong-Zhi Xianyu, “Inflation Correlators at the One-Loop Order: Nonanalyticity, Factorization, Cutting Rule, and OPE,” JHEP 09 (2023) 116 [arXiv: 2304.13295 [hep-th]].

5Zhehan Qin, Zhong-Zhi Xianyu, “Closed-Form Formulae for Inflation Correlators,” JHEP 07 (2023) 001 [arXiv:2301.07047 [hep-th]].

6Zhong-Zhi Xianyu, Hongyu Zhang, “Bootstrapping One-Loop Inflation Correlators with the Spectral Decomposition,” JHEP 04 (2023) 103 [arXiv: 2211.03810 [hep-th]].

7Zhehan Qin, Zhong-Zhi Xianyu, “Helical Inflation Correlators: Partial Mellin-Barnes and Bootstrap Equations,” JHEP 04 (2023) 059 [arXiv: 2208.13790 [hep-th]].

8Zhehan Qin, Zhong-Zhi Xianyu, “Phase Information in Cosmological Collider Signals,” JHEP 10 (2022) 192 [arXiv:2205.01692 [hep-th]].

9Matthew Reece, Lian-Tao Wang, Zhong-Zhi Xianyu, “Large-Field Inflation and the Cosmological Collider,” Phys. Rev. D 107 (2023) L101304 [arXiv:2204.11869 [hep-ph]].

10Xi Tong, Zhong-Zhi Xianyu, “Large Spin-2 Signals at the Cosmological Collider,” JHEP 10(2022) 194 [arXiv:2203.06349 [hep-ph]].

11Yanou Cui, Zhong-Zhi Xianyu, “Probing Leptogenesis with the Cosmological Collider,” Phys. Rev. Lett. 129 (2022) 111301 [arXiv:2112.10793 [hep-ph]].

12Lian-Tao Wang, Zhong-Zhi Xianyu, Yi-Ming Zhong, “Precision Calculation of Inflation Correlators at One Loop,” JHEP 02 (2022) 085 [arXiv:2109.14635 [hep-ph]].

13Qianshu Lu, Matthew Reece, Zhong-Zhi Xianyu, “Missing Scalars at the Cosmological Collider,” JHEP 12 (2021) 098 [arXiv:2108.11385 [hep-ph]].

14Boye Su, Zhong-Zhi Xianyu, Xingyu Zhang, “Probing Ultralight Bosons with Compact Eccentric Binaries,” Astrophys. J. 923 (2021) 114 [arXiv:2107.13527 [gr-qc]].

15Lisa Randall, Alexandra Shelest, Zhong-Zhi Xianyu, “An Efficient Signal to Noise Approximation for Eccentric Inspiraling Binaries,” Astrophys.J. 924 (2022) 102[arXiv:2103.16030 [astro-ph.HE]].

16JiJi Fan, Zhong-Zhi Xianyu, “A Cosmic Microscope for the Preheating Era,” JHEP 01 (2021) 021, [arXiv:2005.12278 [hep-ph]].

17Lian-Tao Wang, Zhong-Zhi Xianyu, “Gauge Boson Signals at the Cosmological Collider,” JHEP 11 (2020) 082, [arXiv:2004.02887 [hep-ph]].

18Lian-Tao Wang, Zhong-Zhi Xianyu, “In Search of Large Signals at the Cosmological Collider,” JHEP 2002 (2020) 044 [arXiv:1910.12876 [hep-ph]].

19Tao Liu, Xi Tong, Yi Wang, Zhong-Zhi Xianyu, “Probing P and CP Violations on the Cosmological Collider,” JHEP 2004 (2020) 189 [arXiv:1909.01819 [hep-ph]].

20Shiyun Lu, Yi Wang, Zhong-Zhi Xianyu, “A Cosmological Higgs Collider,” JHEP 2002 (2020) 011 [arXiv:1907.07390 [hep-th]].

21Lisa Randall, Zhong-Zhi Xianyu, “Eccentricity Without Measuring Eccentricity: Discriminating Among Stellar Mass Black Hole Binary Formation Channels,” Astrophys. J. 914 (2021) 75 [arXiv:1907.02283 [astro-ph.HE]].

22Lisa Randall, Zhong-Zhi Xianyu, “Observing Eccentricity Oscillations of Binary Black Holes in LISA,” arXiv:1902.08604 [astro-ph.HE].

23Xingang Chen, Abraham Loeb, Zhong-Zhi Xianyu, “Unique Fingerprints of Alternatives to Inflation in the Primordial Power Spectrum,” Phys. Rev. Lett. 122 (2019) 121301[arXiv:1809.02603 [astro-ph.CO]].

24Lisa Randall, Zhong-Zhi Xianyu, “A Direct Probe of Mass Density Near Inspiraling Binary Black Holes,” Astrophys. J. 878 (2019) 75 [arXiv:1805.05335 [gr-qc]].

25Xingang Chen, Yi Wang, Zhong-Zhi Xianyu, “Neutrino Signatures in Primordial Non-Gaussianities,” JHEP 1809 (2018) 022 [arXiv:1805.02656 [hep-ph]].

26Xingang Chen, Wan Zhen Chua, Yuxun Guo, Yi Wang, Zhong-Zhi Xianyu, Tianyou Xie, “Quantum Standard Clocks in the Primordial Trispectrum,” JCAP 1805 (2018) 049 [arXiv:1803.04412 [hep-th]].

27Lisa Randall, Zhong-Zhi Xianyu, “An Analytical Portrait of Binary Mergers in Hierarchical Triple Systems,” Astrophys. J. 864 (2018) 134 [arXiv:1802.05718 [gr-qc]].

28Djuna Croon, Ann E. Nelson, Chen Sun, Devin G. E. Walker, Zhong-Zhi Xianyu, “Hidden-Sector Spectroscopy with Gravitational Waves from Binary Neutron Stars,”  Astrophys. J. Lett. 858(2018) L2 [arXiv:1711.02096 [hep-ph]].

29Lisa Randall, Zhong-Zhi Xianyu, “Induced Ellipticity for Inspiraling Binary Systems,” Astrophys. J. 853 (2018) 93 [arXiv:1708.08569 [gr-qc]].

30Xingang Chen, Yi Wang, Zhong-Zhi Xianyu, “Standard Model Mass Spectrum in Inflationary Universe,” JHEP 1704 (2017) 058 [arXiv:1612.08122 [hep-th]].

31Xingang Chen, Yi Wang, Zhong-Zhi Xianyu, “Standard Model Background of the Cosmological Collider,” Phys. Rev. Lett. 118 (2017) 261302 [arXiv:1610.06597 [hep-th]].

32Xingang Chen, Yi Wang, Zhong-Zhi Xianyu, “Loop Corrections to Standard Model Fields in Inflation,” JHEP 1608 (2016) 051 [arXiv:1604.07841 [hep-th]].