A5045517692- Pulsars and Gravitational Waves Research
- Advanced Frequency and Time Standards
- Cosmology and Gravitation Theories
- Geophysics and Sensor Technology
- Noncommutative and Quantum Gravity Theories
- Cold Atom Physics and Bose-Einstein Condensates
- Black Holes and Theoretical Physics
- Advanced Fiber Laser Technologies
- Geophysics and Gravity Measurements
- Scientific Measurement and Uncertainty Evaluation
- Quantum Mechanics and Applications
- Mechanical and Optical Resonators
- Quantum Electrodynamics and Casimir Effect
- Experimental and Theoretical Physics Studies
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Relativity and Gravitational Theory
- Advanced Measurement and Metrology Techniques
- Gamma-ray bursts and supernovae
- Radioactive Decay and Measurement Techniques
- Advanced Photocatalysis Techniques
- Structural Engineering and Vibration Analysis
- GNSS positioning and interference
Huazhong University of Science and Technology
2016-2025
Chongqing Jiaotong University
2021-2025
Yuhuangding Hospital
2024
Qingdao University
2024
Guiyang Medical University
2023
Affiliated Hospital of Guizhou Medical University
2023
Physical Measurement Laboratory
2022
TianQin is a planned space-based gravitational wave (GW) observatory consisting of three earth orbiting satellites with an orbital radius about $10^5~{\rm km}$. The will form equilateral triangle constellation the plane which nearly perpendicular to ecliptic plane. aims detect GWs between $10^{-4}~{\rm Hz}$ and $1~{\rm that can be generated by wide variety important astrophysical cosmological sources, including inspiral Galactic ultra-compact binaries, stellar-mass black hole extreme mass...
Short-range experiments testing the gravitational inverse-square law at submillimeter scale offer uniquely sensitive probes of Lorentz invariance. A combined analysis results from short-range gravity HUST-2015, HUST-2011, IU-2012, and IU-2002 permits first independent measurements 14 nonrelativistic coefficients for violation in pure-gravity sector level 10^{-9} m^{2}, improving by an order magnitude sensitivity to numerous types involving quadratic curvature derivatives couplings.
Abstract While general relativity predicts only two tensor modes for gravitational-wave (GW) polarization, metric theories of gravity allow up to four additional modes, including vector and scalar modes. Observing the polarization GWs could provide a direct test modified gravity. The stochastic GW background (SGWB), which can be detected by space-based laser-interferometric detectors at design sensitivity, will an opportunity directly measure alternative polarization. In this paper, we...
A search for sidereal variations in the non-Newtonian force between two tungsten plates separated at millimeter ranges sets experimental limits on Lorentz invariance violation involving quadratic couplings of Riemann curvature. We show that finite flat is dominated by edge effects, which includes a suppression effect leading to lower than previous rough estimates. From this search, we determine current best constraints violating coefficients level ${10}^{\ensuremath{-}8}\text{ }\text{...
Abstract The TianQin Project is aiming at gravitational wave (GW) detection in space. GW observatory comprises three satellites orbiting on 1 × 10 5 km Earth orbits to form an equilateral-triangle constellation. In order minimize the variations arm lengths and breathing angles, must be launched adjusted precisely into optimized orbit. Therefore, satellite laser ranging used enhance precision of orbit determination. To develop capability for TianQin’s orbit, Laser Ranging Station has been...
Precision measurements of the inverse-square law via experiments on short-range gravity provide sensitive tests Lorentz symmetry. A combined analysis data from at Huazhong University Science and Technology Indiana sets simultaneous limits all 22 coefficients for violation correcting Newton force as inverse sixth power distance. Results are consistent with no effect level 10^{-12} m^{4}.
The principal aim of the space-based gravitational wave detectors is to explore waves in 0.1 mHz-1 Hz frequency band. To maximize potential capability experimental apparatus regarding instrument performance, one needs acquire accurate information on its sensitivity limit. curve question, by definition, depends amplitudes signal and noise involved measurement. In this work, we explicitly derive, under rather universal assumptions irrelevant detailed form time-delay interferometry combination,...
With the accumulation of pulsar timing data, evidence stochastic gravitational wave background (SGWB) in nanohertz is becoming more and significant. It gradually possible to study theory gravity with data. Since arrays (PTAs) can observe multiple pulsars at same time, their different spatial correlation patterns caused by SGWB various polarizations make it detect gravitational-wave polarization. In this paper, we investigate alternative NANOGrav 15-year dataset (NG15). First, frequentist...
Gas molecules within the gravitational reference sensor (GRS) subjected to temperature fluctuations can give rise a net disturbance force on test mass (TM), known as radiometer effect, which limits low frequency sensitivity of space-borne wave (GW) detection. Prior research relied infinite-plate model evaluate this supplemented by correction factor account for GRS geometric configuration, whose specific form remains unknown and is accessible solely through experiments or simulations. In...
Time-delay interferometry is put forward to improve the signal-to-noise ratio of space-borne gravitational wave detectors by canceling large laser phase noise with different combinations measured data. Based on Michelson data combination, sensitivity function detector can be obtained averaging all-sky source positions. At present, there are two main methods encode signal into detector. One adapt polarization angle depending arm orientation in frame, and other divide plus cross polarizations...
Time delay interferometry (TDI) is an algorithm proposed to suppress the laser frequency noise in space-borne gravitational-wave detectors. As a post-processing technique, it implemented by constructing virtual equal-arm interferometer through appropriate combination of time-shifted data streams. Such approach tailored intrinsic feature space-based detection, namely, distances between spacecraft are governed orbital dynamics and thus cannot be held constant. Among different implementations,...
Abstract Atom interferometry provides an important method of high-precision absolute gravity measurement. As gravimeters, various systematic errors atom gravimeters have been identified and evaluated. Here a comprehensive evaluation for transportable gravimeter Huazhong University Science Technology-Quantum Gravimeter (HUST-QG) is presented. HUST-QG exhibited short-term sensitivity 24 μGal Hz −1/2 combined uncertainty 3 μGal. The operation measurements during the 10th International...
Clock noise is one of the dominant noises in space-borne gravitational wave (GW) detection. To suppress this noise, clock noise-calibrated time-delay-interferometry (TDI) technique proposed. In technique, an inter-spacecraft tone transfer chain necessary to obtain comparison information two spacecraft, during which electro-optic-modulator (EOM) critical and used modulate laser phase. Since EOM sideband modulation process introduces extra it may limit experimental demonstration suppression...
Abstract General relativity (GR) is a highly successful theory that describes gravity as geometric phenomenon. The gravitational redshift, classic test of GR, can potentially be violated in alternative theories, and experimental tests on this effect are crucial for our understanding gravity. In paper, considering the space-ground clock comparisons with free-space links, we discuss high-precision Doppler cancellation-based measurement model testing redshift. This effectively reduce various...
Significant disturbances in the test masses, arising from unforeseen instrument anomalies during scientific measurements, have a considerable impact on space-borne gravitational wave detection. Therefore, exploring effective data processing methods to mitigate these effects is of crucial importance. In pioneering effort, previous literature proposed use time-delay interferometry for this purpose and developed first-generation combination two masses same spacecraft. However, due its inherent...
The visible light vegetation indices (VIs) derived from the red, green, and blue spectral bands of UAV (unmanned aerial vehicle) imagery play a vital role in precision agriculture applications. Nevertheless, effects solar elevation angle variations across different flight times remain poorly understood. DJI Phantom 4 RTK high-precision positioning survey was used to conduct timed over cotton plots with both weak growth without nitrogen application strong application. VIs for 13 UAVs at 12...
The ongoing development of the space-based laser interferometer missions is aiming at unprecedented gravitational wave detections in millihertz frequency band. spaceborne nature experimental setups leads to a degree subtlety regarding otherwise overwhelming noise. cancellation latter accomplished through time-delay interferometry technique. Moreover, eventually achieve desired noise level, phase fluctuations onboard ultra-stable oscillator must also be suppressed. This can fulfilled by...