A5103273272- Cold Atom Physics and Bose-Einstein Condensates
- Atomic and Subatomic Physics Research
- Advanced Frequency and Time Standards
- Quantum optics and atomic interactions
- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Terahertz technology and applications
Shanxi University
2021-2024
State Key Laboratory of Quantum Optics and Quantum Optics Devices
2024
Tsinghua University
2024
Since its theoretical sensitivity is limited by quantum noise, radio wave sensing based on Rydberg atoms has the potential to replace traditional counterparts with higher and developed rapidly in recent years. However, as most sensitive atomic sensor, superheterodyne receiver lacks a detailed noise analysis pave way achieve sensitivity. In this work, we quantitatively study power spectrum of versus number atoms, where precisely controlled changing diameters flat-top excitation laser beams....
Governed by the hairy ball theorem, classical antennas with isotropic responses to linearly polarized radio waves are unrealizable. Also, their calibrations face a causal dilemma. Therefore, wave measurements based on challenging achieve high accuracy. This work shows that antenna Rydberg atoms can theoretically an ideal response waves; is, it has zero deviation. Although this conclusion is straightforward, not clear when complex atomic energy levels taken into account. Experimental results...
Microwave electric field precision measurement based on Rydberg atomic quantum coherence effect has rapidly advanced in recent years, capitalizing its high sensitivity, broad bandwidth, and traceability. The utilization of distinct states facilitates achieving an ultra-wideband response across various microwave frequency bands, offering extensive applications wireless communication, radar positioning, astronomical observation, related domains. In this work, leveraging the antenna, we achieve...
Governed by the hairy ball theorem, classical antennas with isotropic responses to linearly polarized radio waves are unrealizable. This work shows that antenna based on Rydberg atoms can theoretically achieve an ideal response waves; is, it has zero deviation. Experimental results of deviation within 5 dB, and 0.3 dB achievable after optimization, in microwave terahertz wave measurements support theory at least 15 improvement than omnidirectional antenna. Combined SI traceable ultrawideband...
Ultra-low frequency noise lasers have been widely used in laser-based experiments. Most narrow-linewidth are implemented by actively suppressing their through a servo loop (FNSL). The bandwidths (LBW) of FNSLs currently below megahertz, which is gradually tricky to meet application requirements, especially for wideband quantum sensing This article has experimentally an FNSL with loop-delay-limited 3.5 MHz LBW, order higher than the usual FNSLs. Using this FNSL, we achieved 70 dB laser...
Since its theoretical sensitivity is limited by quantum noise, radio wave sensing based on Rydberg atoms has the potential to replace traditional counterparts with higher and developed rapidly in recent years. However, as most sensitive atomic sensor, superheterodyne receiver lacks a detailed noise analysis pave way achieve sensitivity. In this work, we quantitatively study power spectrum of versus number atoms, where precisely controlled changing diameters flat-top excitation laser beams....
Measurement sensitivity is one of the critical indicators for Rydberg atomic radio receivers. This work quantitatively studies relationship between superheterodyne receiver's and number atoms involved in measurement. The atom changed by adjusting length interaction area. results show that ideal case, receiver exhibits a quantum scaling: amplitude its output signal proportional to number, read-out noise square root number. Hence, inversely also gives detailed discussion properties transit...
Abstract Measurement sensitivity is one of the critical indicators for Rydberg atomic radio receivers. This work quantitatively studies relationship between superheterodyne receiver's and number atoms involved in measurement. The atom changed by adjusting length interaction area. results show that ideal case, receiver exhibits a quantum scaling: amplitude its output signal proportional to number, read-out noise square root number. Hence, inversely also gives detailed discussion properties...
Ultra-low frequency noise lasers have been widely used in laser-based experiments. Most narrow-linewidth are implemented by actively suppressing their through a servo loop (FNSL). The bandwidths (LBW) of FNSLs currently below megahertz, which is gradually tricky to meet application requirements, especially for wideband quantum sensing This article has experimentally an FNSL with loop-delay-limited 3.5 MHz LBW, order higher than the usual FNSLs. Using this FNSL, we achieved 70 dB laser...