Wenxuan Jia (贾文轩) Welcome to my home page! How to pronounce my name? I’m currently a postdoctoral researcher at MIT LIGO lab, where I did my Ph.D. in physics. Please find my Google scholar's page for a full publication list.

Curriculum Vitae Education:
2019 – 2024	Ph.D. in Physics, Massachusetts Institute of Technology
2015 – 2019	B.S. in Mechanical Engineering, University of Southern California

Selected Publications:
	Squeezing the quantum noise of a gravitational-wave detector below the standard quantum limit Wenxuan Jia, Victoria Xu, Kevin Kuns, Masayuki Nakano, Lisa Barsotti, Matthew Evans, Nergis Mavalvala, and members of the LIGO Scientific Collaboration Science 385, 1318-1321 (2024). arXiv:2404.14569 “For the LIGO Livingston detector, we found that the upgrade reduces quantum noise below the SQL by a maximum of three decibels between 35 and 75 hertz while achieving a broadband sensitivity improvement, increasing the overall detector sensitivity during astrophysical observations.”
	Broadband Quantum Enhancement of the LIGO Detectors with Frequency-Dependent Squeezing Dhruva Ganapathy*, Wenxuan Jia*, Masayuki Nakano*, Victoria Xu*, and members of the LIGO O4 Detector Collaboration (*These authors contributed equally to this work) Physical Review X 13, 041021 (2023). “Here, we present the first realization of frequency-dependent squeezing in full-scale gravitational-wave detectors, resulting in the reduction of both shot noise and quantum radiation pressure noise, with broadband detector enhancement from tens of hertz to several kilohertz.”
	Point Absorber Limits to Future Gravitational-Wave Detectors Wenxuan Jia, Hiroaki Yamamoto, Kevin Kuns, Anamaria Effler, Matthew Evans, and members of the LIGO O3 Detector Collaboration Physical Review Letters 127, 241102 (2021). arXiv:2109.08743 “High-quality optical resonant cavities require low optical loss, typically on the scale of parts per million. However, unintended micron-scale contaminants on the resonator mirrors that absorb the light circulating in the cavity can deform the surface thermoelastically and thus increase losses by scattering light out of the resonant mode. The point absorber effect is a limiting factor in some high-power cavity experiments, for example, the Advanced LIGO gravitational-wave detector. In this Letter, we present a general approach to the point absorber effect from first principles and simulate its contribution to the increased scattering. The achievable circulating power in current and future gravitational-wave detectors is calculated statistically given different point absorber configurations.”
	Squeezing the quantum noise of LIGO below the standard quantum limit Wenxuan Jia Ph.D. Thesis “This thesis develops a first-principle model of quantum noise in LIGO and investigates how squeezing can mitigate it while considering practical factors like optical losses and mode-mismatch. These theories are constructed with a bottom-up approach. Experimental details on generating and utilizing frequency-dependent squeezing for LIGO are also discussed, culminating in the observation of LIGO’s quantum noise below the standard quantum limit.”
Research done when I was an undergraduate:
	Hybrid-Light-Source Stereolithography for Fabricating Macro-Objects with Micro-Textures Wenxuan Jia, Yuen-Shan Leung, Huachao Mao, Han Xu, Chi Zhou, and Yong Chen Journal of Manufacturing Science and Engineering 144(3), 031003 (2022). “The DMD-based mask projection method displays the image of a cross-section of the part on the resin to fabricate the entire layer efficiently; however, its display resolution is limited by the building area. In comparison, the laser-based vector scanning method builds smooth features using a focused laser beam with desired beam-width resolution; however, it has less throughput for its sequential nature. In this paper, we studied the hybrid-light-source stereolithography process that integrates both optical light sources to facilitate the fabrication of macro-objects with microscale surface structures”
	Multi-material stereolithography using curing-on-demand printheads Huachao Mao, Wenxuan Jia, Yuen-Shan Leung, Jie Jin, and Yong Chen Rapid Prototyping Journal 27(5), 861-871 (2021). “This paper aims to present a multi-material additive manufacturing (AM) process with a newly developed curing-on-demand method to fabricate a three-dimensional (3D) object with multiple material compositions.”

Media:
Pushing the boundaries of gravitational wave detection Science, September 2024	We’ve just doubled the number of gravitational waves we can find New Scientist, September 2024	LIGO Beyond the Standard Quantum Limit - WENXUAN JIA Advanced LIGO Documentary Project, April 2024
LIGO Surpasses the Quantum Limit Caltech News, October 2023	Quieting Noise in Gravitational-Wave Detectors Physics, October 2023	How quantum ‘squeezing’ will help LIGO detect more gravitational waves Science News, October 2023
O4: A Tighter Squeeze LIGO Magazine, September 2022	Gold and Silver: USC Viterbi Students Nearly Sweep Top Awards at Nation’s Largest Manufacturing Research Conference USC Viterbi, August 2021

Miscellaneous:

LLO logbook; LHO logbook; MIT logbook

LLO summary pages; real-time FOM

MIT astrophysics oral qualification exam study document

Miracle Loam Primer, a Magic the Gathering Legacy Deck (git)(twitter)(podcast)

Copyright © Wenxuan Jia | Last update: 2024/9/25