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High-precision three-dimensional rydberg atom localization in a four-level atomic system

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Chinese Physics B 2021年第5期30卷 348-352页

作者： Hengfei Zhang Jinpeng Yuan Lirong Wang Liantuan Xiao Suo-tang Jia State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

rydberg atoms have been widely investigated due to their large size,long radiative lifetime,huge polarizability and strong dipole-dipole *** position information of rydberg atoms provides more possibilities for quantum optics research,which can be obtained under the localization *** study the behavior of three-dimensional(3D)rydberg atom localization in a four-level configuration with the measurement of the spatial optical *** atomic localization precision depends strongly on the detuning and Rabi frequency of the involved laser fields.A 100%probability of finding the rydberg atom at a specific 3D position is achieved with precision of~0.031λ.This work demonstrates the possibility for achieving the 3D atom localization of the rydberg atom in the experiment.

关键词： rydberg atom three-dimensional localization standing-wave field

Vapor cell geometry effect on rydberg atom-based microwave electric field measurement

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Chinese Physics B 2018年第3期27卷 104-107页

作者： Linjie Zhang Jiasheng Liu Yue Jia Hao Zhang Zhenfei Song Suotang Jia Institute of Laser Spectroscopy State Key Laboratory of Quantum Optics and Quantum Optics DevicesShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China National Institute of Metrology Beijing 100029China

The geometry effect of a vapor cell on the metrology of a microwave electric field is investigated. Based on the splitting of the electromagnetically induced transparency spectra of cesium rydberg atoms in a vapor cell, high-resolution spatial distribution of the microwave electric field strength is achieved for both a cubic cell and a cylinder cell. The spatial distribution of the microwave field strength in two dimensions is measured with sub-wavelength resolution. The experimental results show that the shape of a vapor cell has a significant influence on the abnormal spatial distribution because of the Fabry-P6rot effect inside a vapor cell. A theoretical simulation is obtained for different vapor cell wall thicknesses and shows that a restricted wall thickness results in a measurement fluctuation smaller than 3% at the center of the vapor cell.

关键词： rydberg atom microwave electric field strength electromagnetically induced transparency (EIT) Aulter-Towns splitting

Photoionization microscopy of rydberg Li atom in an electric field

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Photoionization microscopy of Rydberg Li Atom in an electric...

atom-based power-frequency electric field measurement using the radio-frequency-modulated rydberg spectroscopy

第六届全国计算原子与分子物理学术会议

作者： Dehua Wang Shaohao Cheng Qiang Chen Zhaohang Chen School of Physics and Optoelectronic Engineering Ludong University

The photoionization microscopy of rydberg Li atom in an electric field has been studied on the basis of the semiclassical theory for the first time. Especially we discuss the atomic core scattering effect in the ionization dynamics of the rydberg Li atom. Unlike the case of the photoionization of rydberg H atom in an electric field, where the photoionization microscopy interference patterns are mainly caused by the Coulomb scattering and the electric field potential, for the photoionization of rydberg Li atom in an electric field, the influence of the atomic core scattering effect on the photoionization microscopy interference patterns plays an important role. In addition, the structure of the interference pattern, which contains the spatial component of the electronic wave function, evolves smoothly with the electron energy above the saddle point energy. The observed oscillatory patterns in the electron probability density distributions on the detector plane are interpreted within the framework of the semiclassical approximation, which can be considered as a manifestation of interference between various electron trajectories arriving at a given point from the atom to the detector plane. This study provides some reference values for future experimental research on photoionization microscopy of the non-hydrogen rydberg atoms in the presence of external fields.

关键词： photoionization microscopy core sacttering semiclassical theory rydberg atom

来源： cnki会议评论

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Chinese Physics B 2023年第5期32卷 390-394页

作者：刘伟新张临杰汪涛 Institute of Theoretical Physics and Department of Physics State Key Laboratory of Quantum Optics and Quantum Optics DevicesShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Taiyuan 030006China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Department of Physics and Center of Quantum Materials and DevicesChongqing UniversityChongqing 401331China Center of Modern Physics Institute for Smart City of Chongqing University in LiyangLiyang 213300China

The radio-frequency modulated electromagnetically induced transparency(EIT) in a ladder three-level system with rydberg state is studied. Under the influence of a fast radio-frequency field, the EIT peak splits into a series of *** attaching a power-frequency electric field directly to the fast radio-frequency field, the odd-order sidebands of the rydberg-EIT oscillate sensitively with the power-frequency field. The oscillation frequency is equal to twice the power frequency;the oscillation amplitude is monotonically increasing with the amplitude of the power-frequency field when the change of Stark-shift is smaller than the radio frequency. Our work paves the way for measurement of power-frequency electric field based on rydberg atoms.

关键词： rydberg atom electromagnetically induced transparency spectrum power-frequency electric field

Facilitation of controllable excitation in rydberg atomic ensembles

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Chinese Physics B 2023年第8期32卷 274-282页

作者：王涵钱静 State Key Laboratory of Precision Spectroscopy Department of PhysicsSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200062China

Strongly-interacting rydberg atomic ensembles have shown intense collective excitation effects due to the inclusion of single rydberg excitation shared by multiple atoms in the *** this paper we investigate a counter-intuitive rydberg excitation facilitation with a strongly-interacting atomic ensemble in the strong probe-field regime,which is enabled by the role of a control atom *** from the case of a single ensemble,we show that,the control atom's excitation adds to a second two-photon transition onto the doubly-excited rydberg state,arising an excitation facilitation for the ensemble *** numerical studies depending on the method of quantum Monte Carlo wave function,exhibit the observation constraints of this excitation facilitation effect under practical experimental *** results obtained can provide a flexible control for the excitation of rydberg atomic ensembles and participate further uses in developing mesoscopic rydberg gates for multiqubit quantum computation.

关键词： excitation facilitation rydberg atom Monte Carlo wave function many-body system

Electric field intensity measurement by using doublet electromagnetically induced transparency of cold Rb rydberg atoms

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Chinese Physics B 2023年第10期32卷 405-409页

作者：宫廷师帅姬中华郭古青孙小聪田亚莉邱选兵李传亮赵延霆贾锁堂 Shanxi Engineering Research Center of Precision Measurement and Online Detection Equipment School of Applied ScienceTaiyuan University of Science and TechnologyTaiyuan 030024China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

We demonstrate a simple method to measure electric field intensity by using doublet electromagnetically induced transparency(EIT) spectra of cold Rb rydberg atoms, where the frequency of the coupling laser does not need to be locked. Based on the Stark splitting of the Rb rydberg state, 10D_(3/2), under electric fields and the corresponding calculated polarizabilities, the real electric field intensity is calculated using the difference in radio-frequency diffraction between two acousto-optic modulators, which acts as a frequency criterion that allows us to measure the electrical field without locking the coupling laser. The value measured by this simple method shows a good agreement with our previous work [*** 29 1558(2021)] where the frequency of the coupling laser needs to be locked with an additional EIT spectrum based on atom vapor and a proportional–integral–differential feedback circuit. Our presented method can also be extended to the measurement of electric field based on hot rydberg atom vapor, which has application in industry.

关键词： doublet electromagnetically induced transparency(EIT) Aulter–Townes(AT)splitting rydberg atom electric field measurement

Lee–Yang zeros in the rydberg atoms

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Frontiers of physics 2023年第2期18卷 197-204页

作者： Chengshu Li Fan Yang Institute for Advanced Study Tsinghua UniversityBeijing 100084China

Lee–Yang (LY) zeros play a fundamental role in the formulation of statistical physics in terms of (grand) partition functions, and assume theoretical significance for the phenomenon of phase transitions. In this paper, motivated by recent progress in cold rydberg atom experiments, we explore the LY zeros in classical rydberg blockade models. We find that the distribution of zeros of partition functions for these models in one dimension (1d) can be obtained analytically. We prove that all the LY zeros are real and negative for such models with arbitrary blockade radii. Therefore, no phase transitions happen in 1d classical rydberg chains. We investigate how the zeros redistribute as one interpolates between different blockade radii. We also discuss possible experimental measurements of these zeros.

关键词： Lee-Yang zeros rydberg atom statistical mechanics

基于里德堡原子电场传感的计量、通信以及混合量子系统

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Science Bulletin 2024年第10期69卷 1515-1535页

作者：张好马宇廖开宇杨文广刘宗凯丁冬生颜辉李文辉张临杰 State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230036China Key Laboratory of atomic and Subatomic Structure and Quantum Control(Ministry of Education) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of MatterSchool of PhysicsSouth China Normal UniversityGuangzhou 510006China Centre for Quantum Technologies National University of SingaporeSingapore 117543Singapore Hefei National Laboratory Hefei 230088China

rydberg atoms-based electric field sensing has developed rapidly over the past decade.A variety of theoretical proposals and experiment configurations are suggested and realized to improve the measurement metrics,such as intensity sensitivity,bandwidth,phase,and *** Stark effect and electromagnetically induced transparency(EIT)or electromagnetically induced absorption(EIA)are fundamental physics principles behind the ***,various techniques such as amplitude-or frequency-modulation,optical homodyne read-out,microwave superheterodyne and frequency conversion based on multi-wave mixing in atoms are utilized to push the metrics into higher *** this review,different technologies and the corresponding metrics they had achieved were presented,hoping to inspire more possibilities in the improvement of metrics of rydberg atom-based electric field sensing and broadness of application scenarios.

关键词： rydberg atom Electric field sensing atomic sensor

Magnetic-field-induced deflection of nonlocal light bullets in a rydberg atomic gas

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Chinese Optics Letters 2022年第4期20卷 60-64页

作者： Xiujia Dong Yao Ding Zhengyang Bai Guoxiang Huang State Key Laboratory of Precision Spectroscopy Shanghai 200062China NYU-ECNU Institute of Physics at NYU Shanghai Shanghai 200062China

Light bullets(LBs)are localized nonlinear waves propagating in high spatial *** stable LBs and realizing their control are desirable due to the interesting physics and potential ***,we show that nonlocal LBs generated in a cold rydberg atomic gas via the balance among the dispersion,diffraction,and giant nonlocal Kerr nonlinearity contributed by long-range rydberg-rydberg interaction can be actively manipulated by using a weak gradient magnetic *** LBs are generated by a balance among dispersion,diffraction,and large nonlocal Kerr nonlinearities contributed by long-range rydberg-rydberg ***,we find that active manipulation can be achieved by weak gradient magnetic fields in cold rydberg atomic ***,the LBs may undergo significant Stern-Gerlach deflections,and their motion trajectories can be controlled by adjusting the magnetic-field *** results reported here are helpful not only for understanding unique properties of LBs in nonlocal optical media but also for finding ways for precision measurements of magnetic fields.

关键词： nonlinear optics optical soliton rydberg atom