A5103272541- Advanced Frequency and Time Standards
- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Atomic and Molecular Physics
- Photonic and Optical Devices
- Advanced Fiber Laser Technologies
- Optical Polarization and Ellipsometry
- Advanced Photonic Communication Systems
- Scientific Measurement and Uncertainty Evaluation
- Quantum optics and atomic interactions
- Advanced Measurement and Metrology Techniques
- Quantum Information and Cryptography
- Calibration and Measurement Techniques
Hebei University
2024
Huazhong University of Science and Technology
2019-2023
Abstract Magnetic field noise is an important factor causing quantum decoherence in systems. In order to suppress the effect, magnetic needs be properly measured and controlled. power spectrum measurement using a single trapped ion based analyzer very effective way. this paper, on dynamic decoupling technique analyzed theoretically. Furthermore, we use magnetically insensitive transition measure noise, which has potential stronger speed up process. our experiment, by active feedback control...
A new microwave photonic structure for measuring the frequency of an RF signal, to best our knowledge, is presented. The unknown signal can be determined by simply system output optical powers. proposed measurement designed so that ratio two powers as a function or amplitude comparison (ACF) has steep linear slope over wide range. This enables measured in high resolution and accuracy. simple compact structure, free high-speed photodetectors well components instruments. It also fast response...
The authors report the precision measurement of ${}^{25}$Mg${}^{+}$ ion-doublet transition frequencies using a decoherence-assisted spectroscopy method with full use spontaneous emission signals to improve detection sensitivity. results indicate that consideration additional physical effects in theoretical calculations, such as possible capture electron correlations, is required.
We present a simple method to measure the degrees of circular polarization (DoCP) laser light inside vacuum chamber and birefringence window by detecting fluorescence emitted Doppler cooled ions in an ion trap. Imperfect will cause be pumped dark state which decrease rates ions. With simulation based on rate equations relevant energy levels 25Mg+ ions, we find that is sensitive DoCP laser. Based result, new optimize adjusting fast axis azimuthal angles half-wave plate quarter-wave outside...
Accurate control of the polarization states laser light is important in precision measurement experiments. In experiments involving use a vacuum environment, stress-induced birefringence effect windows will affect inside system, and it very difficult to measure optimize situ. The purpose this protocol demonstrate how based on fluorescence ions calculate azimuthal angles external wave plates with Mueller matrix. 25Mg+ induced by that resonant transition |32P3/2,F = 4, mF 4 → |32S1/2,F 3, 3...