A5103144810- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Dark Matter and Cosmic Phenomena
- Radioactive Decay and Measurement Techniques
- Scientific Measurement and Uncertainty Evaluation
- Neutrino Physics Research
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Nuclear physics research studies
- Experimental and Theoretical Physics Studies
- Particle Detector Development and Performance
- Reinforcement Learning in Robotics
- Particle Accelerators and Free-Electron Lasers
- Adaptive Dynamic Programming Control
- Soil Moisture and Remote Sensing
- Noncommutative and Quantum Gravity Theories
- Optical Coherence Tomography Applications
- Computational Physics and Python Applications
- melanin and skin pigmentation
- Quantum, superfluid, helium dynamics
- Medical Imaging Techniques and Applications
Nankai University
2013-2025
Henan University
2023
Inner Mongolia University
2023
Institute of High Energy Physics
2023
Yalong Hydro (China)
2023
Tsinghua University
2014-2022
Tsinghua–Berkeley Shenzhen Institute
2022
University of California, Berkeley
2015-2020
Huazhong University of Science and Technology
2018
Beihang University
2015
The Compact Muon Solenoid (CMS) detector is described. operates at the Large Hadron Collider (LHC) CERN. It was conceived to study proton-proton (and lead-lead) collisions a centre-of-mass energy of 14 TeV (5.5 nucleon-nucleon) and luminosities up 1034 cm−2 s−1 (1027 s−1). At core CMS sits high-magnetic-field large-bore superconducting solenoid surrounding an all-silicon pixel strip tracker, lead-tungstate scintillating-crystals electromagnetic calorimeter, brass-scintillator sampling hadron...
Measurements of the fine-structure constant α require methods from across subfields and are thus powerful tests consistency theory experiment in physics. Using recoil frequency cesium-133 atoms a matter-wave interferometer, we recorded most accurate measurement to date: = 1/137.035999046(27) at 2.0 × 10-10 accuracy. multiphoton interactions (Bragg diffraction Bloch oscillations), demonstrate largest phase (12 million radians) any Ramsey-Bordé interferometer control systematic effects level...
We experimentally and theoretically study the diffraction phase of large-momentum transfer beam splitters in atom interferometers based on Bragg diffraction. null increase sensitivity interferometer by combining with Bloch oscillations. demonstrate agreement between experiment theory, a 1500-fold reduction phase, limited measurement noise. In addition to reduced systematic effects, our has high contrast up 4.4×10(6) radians difference, resolution fine structure constant δα/α=0.25 ppb 25 h...
Abstract CDEX-50 is a next-generation project of the China Dark Matter Experiment (CDEX) that aims to search for dark matter using 50-kg germanium detector array. This paper comprises thorough summary experiment, including an investigation potential background sources and development model. Based on baseline model, projected sensitivity weakly interacting massive particle (WIMP) also presented. The expected level within energy region interest, set 2–2.5 keVee, ∼0.01 counts keVee -1 kg day ....
We have investigated Lorentz violation through analyzing tides-subtracted gravity data measured by superconducting gravimeters. At the level of precision gravimeters, we brought up and resolved an existing issue accuracy due to unaccounted local tidal effects in previous solid-earth model used. Specifically, taken tides into account with a brand new first-principles ocean included, as well removed potential bias from using worldwide array 12 Compared test more accurate competitive bound on...
Abstract Using an atom interferometer to measure the quotient of reduced Planck's constant and mass a cesium‐133 , most accurate measurement fine structure is recorded, at accuracy 0.20 parts per billion (ppb). multiphoton interactions (Bragg diffraction Bloch oscillations), largest phase (12 million radians) any Ramsey–Bordé controlled systematic effects level 0.12 ppb are demonstrated. Comparing Penning trap measurements with Standard Model prediction electron gyromagnetic anomaly based on...
We present a hybrid laser frequency stabilization method combining modulation transfer spectroscopy (MTS) and (FMS) for the cesium D2 transition. In typical pump-probe setup, error signal is combination of DC-coupled MTS AC-coupled FMS signal. This combines long-term stability former with high signal-to-noise ratio latter. addition, we enhance intensity stabilization. By measuring difference between two independent spectroscopies, investigate short-and stability. find 7.8 kHz characterized...
Bragg diffraction has been used in atom interferometers because it allows signal enhancement through multiphoton momentum transfer and suppression of systematics by not changing the internal state atoms. Its multi-port nature, however, can lead to parasitic interferometers, for intensity-dependent phase shifts primary distorts ellipses extraction. We study suppress these unwanted effects. Specifically, extraction ellipse fitting resulting systematic are calculated Monte Carlo simulations....
We report the ultra-high efficiency transport of cold 87Rb atoms using a moving magnetic quadrupole potential generated by three overlapping pairs fixed coils. The transfer is better than 97%, which highest ever reported to our knowledge. temperature increase due heating less 10 when initial cloud 110 μK. Our setup similar transferring belt design [Phys. Rev. A 63 (2001) 031401(R)], although it simpler because push coil not required. use away from magneto-optical trap very close wall glass...
CDEX-50 is a next-generation project of the China Dark Matter Experiment (CDEX) that aims to search for dark matter using 50-kg germanium detector array. This paper comprises thorough summary experiment, including an investigation potential background sources and development model. Based on baseline model, projected sensitivity weakly interacting massive particle (WIMP) also presented. The expected level within energy region interest, set 2--2.5 keVee, $\sim$0.01 counts keVee$^{-1}$...
Correlating the signals from simultaneous atom interferometers has enabled some of most precise determinations fundamental constants. Here, we show that multiple with strategically chosen initial conditions ("offset conjugate interferometers" or OSCIs) can provide multi-channel readouts amplify suppress specific effects. This allows us to measure photon recoil, and thus fine structure constant, while being insensitive gravity gradients, general acceleration unwanted diffraction phases -...