Wei Quan
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View article: Vision Talk
Vision Talk Open
Plenary talk presented at the XXI International Workshop on Neutrino Telescopes - Padova 29 September - 3 October 2025 (https://agenda.infn.it/event/44606/)
View article: SPT-3G D1: Axion Early Dark Energy with CMB experiments and DESI
SPT-3G D1: Axion Early Dark Energy with CMB experiments and DESI Open
We present the most up-to-date constraints on axion early dark energy (AEDE) from cosmic microwave background (CMB) and baryon acoustic oscillation (BAO) measurements. In particular, we assess the impact of data from ground-based CMB exper…
View article: Stabilized control of electron polarization based on optical rotation feedback in the SERF co-magnetometer
Stabilized control of electron polarization based on optical rotation feedback in the SERF co-magnetometer Open
Electron polarization fluctuations limit the long-term stability of the spin-exchange relaxation-free co-magnetometer (SERFCM) output. To address this issue, this paper proposes what is, to our knowledge, a novel method for the non-destruc…
View article: Magnetic noise suppression based on mid-frequency magnetic field response in SERF atomic comagnetometers
Magnetic noise suppression based on mid-frequency magnetic field response in SERF atomic comagnetometers Open
The atomic comagnetometers (ACMs) based on the spin-exchange relaxation-free (SERF) regime exhibit extremely high sensitivity in angular velocity measurements, positioning them as leading candidates for next-generation precision inertial s…
View article: Measurements of the temperature and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>E</mml:mi></mml:math>-mode polarization of the cosmic microwave background from the full 500-square-degree SPTpol dataset
Measurements of the temperature and -mode polarization of the cosmic microwave background from the full 500-square-degree SPTpol dataset Open
International audience
View article: Millimeter-wave observations of Euclid Deep Field South using the South Pole Telescope: A data release of temperature maps and catalogs
Millimeter-wave observations of Euclid Deep Field South using the South Pole Telescope: A data release of temperature maps and catalogs Open
Context. The South Pole Telescope third-generation camera (SPT-3G) has observed over 10,000 square degrees of sky at 95, 150, and 220 GHz (3.3, 2.0, 1.4 mm, respectively) overlapping the ongoing 14,000 square-degree Euclid Wide Survey. The…
View article: Analysis and Suppression of Pump Beam Alignment Error in SERF Co-Magnetometer
Analysis and Suppression of Pump Beam Alignment Error in SERF Co-Magnetometer Open
The beam angle error of the pump light in a K-Rb-21Ne spin-exchange relaxation-free atomic co-magnetometer (SERFCM) significantly degrades the efficiency of optical pumping and the system’s ability to suppress magnetic field noise. In this…
View article: Constraints on Inflationary Gravitational Waves with Two Years of SPT-3G Data
Constraints on Inflationary Gravitational Waves with Two Years of SPT-3G Data Open
We present a measurement of the $B$-mode polarization power spectrum of the cosmic microwave background anisotropies at 32 $\le$ $\ell$ $<$ 502 for three bands centered at 95, 150, and 220 GHz using data from the SPT-3G receiver on the Sou…
View article: Detection of Thermal Emission at Millimeter Wavelengths from Low-Earth Orbit Satellites
Detection of Thermal Emission at Millimeter Wavelengths from Low-Earth Orbit Satellites Open
The detection of satellite thermal emission at millimeter wavelengths is presented using data from the 3rd-Generation receiver on the South Pole Telescope (SPT-3G). This represents the first reported detection of thermal emission from arti…
View article: Zero‐Position Closed‐Loop Control of Nuclear Spin in a K‐Rb‐21Ne$^{21}{\rm Ne}$ Comagnetometer
Zero‐Position Closed‐Loop Control of Nuclear Spin in a K‐Rb‐21Ne$^{21}{\rm Ne}$ Comagnetometer Open
In SERF (spin‐exchange relaxation‐free) comagnetometers, the fluctuation of the atomic ensemble's polarization significantly impacts the long‐term stability of the output signal. A real‐time closed‐loop control method for the nuclear spin …
View article: Measurement and Modeling of Polarized Atmosphere at the South Pole with SPT-3G
Measurement and Modeling of Polarized Atmosphere at the South Pole with SPT-3G Open
We present the detection and characterization of fluctuations in linearly polarized emission from the atmosphere above the South Pole. These measurements make use of data from the SPT-3G receiver on the South Pole Telescope in three freque…
View article: Simulation of Three-Dimensional Polarization Distribution in SERF Inertial Measurement Atomic Spin Ensembles Based on Light Field Manipulation
Simulation of Three-Dimensional Polarization Distribution in SERF Inertial Measurement Atomic Spin Ensembles Based on Light Field Manipulation Open
The inertial measurement system based on the SERF effect utilizes the rotation of the inertia-sensitive space with longitudinally hyperpolarized nuclear spin, possessing the potential for ultra-high sensitivity measurement, and has become …
View article: Transient Heat Transfer Modeling of SERF Co-Magnetometer Atomic Ensemble Based on the Thermoelectric Analogy Method
Transient Heat Transfer Modeling of SERF Co-Magnetometer Atomic Ensemble Based on the Thermoelectric Analogy Method Open
Bias instability is one of the most critical factors in the performance of spin-exchange relaxation-free (SERF) co-magnetometers. Previous studies on SERF co-magnetometers have shown that changes in the atomic ensemble temperature can lead…
View article: Effect of optical polarization error on the magnetic resonance signal of NMOR atomic magnetometer
Effect of optical polarization error on the magnetic resonance signal of NMOR atomic magnetometer Open
In NMOR magnetometers, we choose the linear polarized light to pump atoms, and the polarization state is the key factor affecting the evolution of alkali metal atoms. However, polarization errors are introduced due to the refraction of the…
View article: Simulation Research on Low-Frequency Magnetic Noise in Fe-Based Nanocrystalline Magnetic Shields
Simulation Research on Low-Frequency Magnetic Noise in Fe-Based Nanocrystalline Magnetic Shields Open
Depending on high permeability, high Curie temperature, and low eddy current loss noise, nanocrystalline alloys, as the innermost layer, exhibit great potential in the construction of cylindrical magnetic shielding systems with a high shie…
View article: Measurements of the Temperature and E-mode Polarization of the Cosmic Microwave Background from the Full 500-square-degree SPTpol Dataset
Measurements of the Temperature and E-mode Polarization of the Cosmic Microwave Background from the Full 500-square-degree SPTpol Dataset Open
Using the full four-year SPTpol 500 deg$^2$ dataset in both the 95 GHz and 150 GHz frequency bands, we present measurements of the temperature and $E$-mode polarization of the cosmic microwave background (CMB), as well as the $E$-mode pola…
View article: Pointing Accuracy Improvements for the South Pole Telescope with Machine Learning
Pointing Accuracy Improvements for the South Pole Telescope with Machine Learning Open
We present improvements to the pointing accuracy of the South Pole Telescope (SPT) using machine learning. The ability of the SPT to point accurately at the sky is limited by its structural imperfections, which are impacted by the extreme …
View article: Study of balancing methods for parallel cable transmission lines
Study of balancing methods for parallel cable transmission lines Open
Cables are of vital importance for the transmission and distribution of electricity within the power grid. However, as the demand for electricity continues to grow, the transmission capacity of a single high-voltage cable is no longer suff…
View article: Cosmology From CMB Lensing and Delensed EE Power Spectra Using 2019-2020 SPT-3G Polarization Data
Cosmology From CMB Lensing and Delensed EE Power Spectra Using 2019-2020 SPT-3G Polarization Data Open
From CMB polarization data alone we reconstruct the CMB lensing power spectrum, comparable in overall constraining power to previous temperature-based reconstructions, and an unlensed E-mode power spectrum. The observations, taken in 2019 …
View article: Far-Detuning Laser Frequency Disturbance Suppression for Atomic Sensor Based on Intrinsic Fiber Fabry–Pérot Cavity
Far-Detuning Laser Frequency Disturbance Suppression for Atomic Sensor Based on Intrinsic Fiber Fabry–Pérot Cavity Open
The method of laser far-detuned frequency locking is proposed based on a fiber Fabry–Perot cavity which transfers the ultra-stable atomic reference frequency stability to the target laser utilized for atomic sensors. The control transfer f…
View article: First Constraints on the Epoch of Reionization Using the Non-Gaussianity of the Kinematic Sunyaev-Zel’dovich Effect from the South Pole Telescope and Herschel-SPIRE Observations
First Constraints on the Epoch of Reionization Using the Non-Gaussianity of the Kinematic Sunyaev-Zel’dovich Effect from the South Pole Telescope and Herschel-SPIRE Observations Open
We report results from an analysis aimed at detecting the trispectrum of the kinematic Sunyaev-Zel'dovich (kSZ) effect by combining data from the South Pole Telescope (SPT) and Herschel-SPIRE experiments over a 100 deg^{2} field. The SPT o…
View article: Hybrid Intelligent Model for Estimating the Cost of Huizhou Replica Traditional Vernacular Dwellings
Hybrid Intelligent Model for Estimating the Cost of Huizhou Replica Traditional Vernacular Dwellings Open
Amidst the backdrop of rural revitalization and cultural renaissance, there is a surge in the construction demand for replica traditional vernacular dwellings. Traditional cost estimation methods struggle to meet the need for rapid and pre…
View article: Measurement and Modeling of Polarized Atmosphere at the South Pole with SPT-3G
Measurement and Modeling of Polarized Atmosphere at the South Pole with SPT-3G Open
We present the detection and characterization of fluctuations in linearly polarized emission from the atmosphere above the South Pole. These measurements make use of data from the SPT-3G receiver on the South Pole Telescope in three freque…
View article: Separation and Evaluation of the Gradient Relaxation in the Atomic Comagnetometer
Separation and Evaluation of the Gradient Relaxation in the Atomic Comagnetometer Open
In the atomic comagnetometer, nuclear spin relaxation is a core parameter that affects the magnetic field suppression ability and stability, and is influenced by various gradient fields. It is necessary to measure and separate the effects …
View article: Mode analysis of spin field of thermal atomic ensembles
Mode analysis of spin field of thermal atomic ensembles Open
The spin dynamics in a thermal atomic vapor cell have been investigated thoroughly over the past decades and have proven to be successful in quantum metrology and memory owing to their long coherent time and manipulation convenience. The e…
View article: First Constraints on the Epoch of Reionization Using the non-Gaussianity\n of the Kinematic Sunyaev-Zel{'}dovich Effect from the South Pole Telescope\n and {\\it Herschel}-SPIRE Observations
First Constraints on the Epoch of Reionization Using the non-Gaussianity\n of the Kinematic Sunyaev-Zel{'}dovich Effect from the South Pole Telescope\n and {\\it Herschel}-SPIRE Observations Open
We report results from an analysis aimed at detecting the trispectrum of the\nkinematic Sunyaev-Zel{'}dovich (kSZ) effect by combining data from the South\nPole Telescope (SPT) and {\\it Herschel}-SPIRE experiments over a 100 ${\\rm\ndeg}^…
View article: Research on Reinforcement Technology for Cover Beam Structures of in-service Bridge
Research on Reinforcement Technology for Cover Beam Structures of in-service Bridge Open
In order to determine a suitable reinforcement technology for the cover beam structure of a bridge in service, a model of a bridge in Shanxi Province was created and analyzed. Three different reinforcement methods were simulated using the …