Publications

Select publications with significant group contributions are listed here. An up-to-date list (including collaboration papers as part of the LIGO Scientific Collaboration and the LIGO Detector Collaboration) can be found on arXiv, Inspire, or ADS.

2025

• Advanced LIGO detector performance in the fourth observing run
  E. Capote, W. Jia, N. Aritomi, M. Nakano, V. Xu, and LIGO O4 instrument scientists, LIGO-P2400256
  Phys. Rev. D 111, 062002 (2025) ; [arXiv]

2024

• Squeezing the quantum noise of a gravitational-wave detector below the standard quantum limit
  W. Jia, V. Xu, K. Kuns, M. Nakano, L. Barsotti, M. Evans, N. Mavalvala, and LIGO O4 instrument scientists
  Science 385, 1318–1321 (2024) ; [arXiv]
  Selected secondary reports:

  • "We've just doubled the number of gravitational waves we can find," New Scientist, September 19, 2024 [link]
• Coherence limits in lattice atom interferometry at the one-minute scale
  C. D. Panda, M. Tao, J. Egelhoff, M. Ceja, V. Xu, and H. Müller
  Nature Physics 20, 1234–1239 (2024) ; [arXiv]

2023

• Broadband quantum enhancement of the LIGO detectors with frequency-dependent squeezing
  D. Ganapathy, W. Jia, M. Nakano, V. Xu, N. Aritomi, T. Cullen, N. Kijbunchoo, S. E. Dwyer, A. Mullavey, L. McCuller, L. Barsotti, and LIGO O4 instrument scientists
  Phys. Rev. X 13, 041021 (2023) ^*Featured in Physics
  Selected secondary reports:

  • "LIGO Surpasses the Quantum Limit," Caltech & MIT News + others (2023) [link]
  • "Quieting Noise in Gravitational-Wave Detectors," M. Rini, Physics 16, 189 (2023) [link]
  • "Frequency-dependent squeezing pushes LIGO sensitivity to new records," J. Miller, Physics Today 77, 1, 13–16 (2024) [link]

2022

• Probing squeezing for gravitational-wave detectors with an audio-band field
  D. Ganapathy, V. Xu, W. Jia, C. Whittle, M. Tse, L. Barsotti, M. Evans, L. McCuller
  Phys. Rev. D 105, 122005 (2022) ; [arXiv]

2021

• Raman transitions driven by phase-modulated light in a cavity atom interferometer
  S. L. Kristensen, M. Jaffe, V. Xu, C. D. Panda, and H. Müller
  Phys. Rev. A 103 023715 (2021) ^*Editor's Suggestion ; [arXiv]

2020

• Lattice atom interferometry in an optical cavity, V. Xu, PhD thesis, UC Berkeley Physics, December 2020. vax_thesis

2019

• Probing gravity by holding atoms for 20 seconds
  V. Xu, M. Jaffe, C. D. Panda, S. L. Kristensen, L. W. Clark, and H. Müller
  Science 366, 745–749 (2019) ; [arXiv]
  Selected secondary reports:

  • "2019 Top 10 Breakthroughs of the Year," Physics World [link]
  • "Hold my gravimeter," A. Taroni, Nature Physics 15, 1210 (2019) [link]
  • "A powerful interferometer works by holding, not dropping, its atoms," R. M. Wilson, Physics Today 73, 1, 14 (2020) [link]

2018

• Efficient adiabatic spin-dependent kicks in an atom interferometer
  M. Jaffe, V. Xu, P. Haslinger, H. Müller, and P. Hamilton
  Phys. Rev. Lett. 121, 040402 (2018) ; [arXiv]
• Attractive force on atoms due to blackbody radiation
  P. Haslinger, M. Jaffe, V. Xu, O. Schwartz, M. Sonnleitner, M. Ritsch-Marte, H. Ritsch, and H. Müller
  Nature Physics 14, 257–260 (2018) ; [arXiv]
  Selected secondary reports:

  • "Hot bodies are attractive," R. Sanders, UC Berkeley News, December 8, 2017 [link]

2017

• Testing sub-gravitational forces on atoms from a miniature, in-vacuum source mass
  M. Jaffe, P. Haslinger, V. Xu, P. Hamilton, A. Upadhye, B. Elder, J. Khoury, and H. Müller
  Nature Physics 13, 938–942 (2017) ; [arXiv]