Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Chinese Physics Letters

Motional Stark Effect and Its Active Cancellation in Diamagnetic Spectrum of Barium

Quan Wei, Hongping Liu, Shen Li, Mingsheng Zhan

Published Feb 19, 2007• 2 citations
Publisher

Abstract

With time-of-flight and electric field ionization detection technique, we investigate the motional Stark effect for highly excited Rydberg barium in high magnetic field and its active cancellation experimentally. In the experiment, the atom beam is aligned at a small angle of 15° with respect to the magnetic field. The motional Stark effect cancellation is demonstrated on two sets of circularly polarized spectra in static magnetic field B = 1.00000 Tesla and B = 1.70000 Tesla, respectively, although the effect is very small (~3.5 Vcm −1 ) in our apparatus configuration.

DOI
10.1088/0256-307x/24/3/023

Related papers

Motional Stark Effect and Its Active Cancellation in Diamagnetic Spectrum of Barium

全威, 刘红平, 沈礼 +1 more

与 time-of-flight 和电场电离察觉技术， weinvestigate 为在高磁场 andits 的高度激动的 Rydberg 钡的动的空效果活跃取消试验性地。在实验，原子横梁在小 angleof 被排列关于磁场的 15 个学位。二上的动的空效果取消 isdemonstrated 在静态的磁场 B = 循环地极化的系列设定 1.00000 Teslaand B = 1.70000 泰斯拉，分别地尽管效果是很小的(类似于 3.5 Vcm (-1)) inour 仪器配置。

Chinese Physics Letters•Jan 1, 2007•0 citations

Active cancellation of the motional Stark effect in the diamagnetic spectrum of Ba

Roger James Elliott, G Droungas, J P Connerade

We report on experiments in which we have been able to actively cancel the motional Stark effect and observe pure diamagnetic spectra for the barium atom. These differ from those previously reported in that they contain no intruding structure. In addition, the sigma + and sigma - spectra have been found to be identical.

Journal of Physics B Atomic Molecular and Optical Physics•Sep 14, 1995•25 citations

Stark spectrum of barium in highly excited Rydberg states

Haifeng Yang, Wei Jia Gao, Hong Cheng +2 more

We present observations of Stark spectra of barium in highly excited Rydberg states in the energy region around n = 35. The one-photon excitation concerns the π transition. The observed Stark spectra at electric fields ranging from 0 to 60 V·cm −1 are well explained by the diagonalization of the Hamiltonian incorporating the core effects. From the Stark maps, the anti-crossings between energy levels are identified experimentally and theoretically. The time of flight spectra at the specified Stark states are recorded, where the deceleration and acceleration of barium atoms are observed. This is very consistent with the prediction derived from the Stark maps from the point of view of energy conservation.

Chinese Physics B•Jan 1, 2013•3 citations

Resonance spectra of Ba Rydberg atom in electric field above the ionization limit

Jiakun Xu, Wenjie Yu, Qing Ye

Stark spectra of barium Rydberg states above the classical field-ionization limit have been recorded employing high-resolution laser spectroscopy with π and σ polarization.The resonance structure is observed obviously in experiment, and the theoretical calculations considering the core effect are well in coincidence with the experimental observation.

International Photonics and Optoelectronics Meetings•Jan 1, 2017•0 citations

Nonlinear spectroscopy of barium in parallel electric and magnetic fields

Haifeng Yang, Wei Jia Gao, Hong Cheng +1 more

We report on the experimental spectral observations of barium in parallel electric and magnetic fields. The laser pulse is linearly polarized along or perpendicular to the fields, leading to the states m = 0 and the states m = ±1 populated, respectively, by one photon excitation. By sweeping the electric field, we observe the linear and nonlinear splitting of the diamagnetic spectrum as the electric field increases. The spectral anticrossing is induced by the atomic core effect. The Stark spectrum also shows an obvious nonlinear quadratic behavior when the applied magnetic field varies strongly. All spectra are well explained by the full quantum calculation after taking the quantum defect effects of the channel n s up to n f into account.

Chinese Physics B•Oct 1, 2014•0 citations

Rydberg states of helium in electric and magnetic fields of arbitrary relative orientation

Ondřej Tkáč, Matija Žeško, Josef A. Agner +2 more

A spectroscopic study of Rydberg states of helium (n = 30 and 45) in magnetic, electric and combined magnetic and electric fields with arbitrary relative orientations of the field vectors is presented. The emphasis is on two special cases where (i) the diamagnetic term is negligible and both paramagnetic Zeeman and Stark effects are linear (n = 30, B ≤ 120 mT and F = 0-78 V cm⁻¹), and (ii) the diamagnetic term is dominant and the Stark effect is linear (n = 45, B = 277 mT and F = 0-8 V cm⁻¹). Both cases correspond to regimes where the interactions induced by the electric and magnetic fields are much weaker than the Coulomb interaction, but much stronger than the spin-orbit interaction. The experimental spectra are compared to spectra calculated by determining the eigenvalues of the Hamiltonian matrix describing helium Rydberg states in the external fields. The spectra and the calculated energy-level diagrams in external fields reveal avoided crossings between levels of different m ₗ values and pronounced m ₁-mixing effects at all angles between the electric- and magnetic-field vectors other than 0. These observations are discussed in the context of the development of a method to generate dense samples of cold atoms and molecules in a magnetic trap following Rydberg-Stark deceleration.

•Apr 1, 2016•5 citations
With time-of-flight and electric field ionization detection technique, we investigate the motional Stark effect for highly excited Rydberg barium in high magnetic field and its active cancellation experimentally. In the experiment, the atom beam is aligned at a small angle of 15° with respect to the magnetic field. The motional Stark effect cancellation is demonstrated on two sets of circularly polarized spectra in static magnetic field B = 1.00000 Tesla and B = 1.70000 Tesla, respectively, although the effect is very small (~3.5 Vcm −1 ) in our apparatus configuration.
We present observations of Stark spectra of barium in highly excited Rydberg states in the energy region around n = 35. The one-photon excitation concerns the π transition. The observed Stark spectra at electric fields ranging from 0 to 60 V·cm −1 are well explained by the diagonalization of the Hamiltonian incorporating the core effects. From the Stark maps, the anti-crossings between energy levels are identified experimentally and theoretically. The time of flight spectra at the specified Stark states are recorded, where the deceleration and acceleration of barium atoms are observed. This is very consistent with the prediction derived from the Stark maps from the point of view of energy conservation.
We report on the experimental spectral observations of barium in parallel electric and magnetic fields. The laser pulse is linearly polarized along or perpendicular to the fields, leading to the states m = 0 and the states m = ±1 populated, respectively, by one photon excitation. By sweeping the electric field, we observe the linear and nonlinear splitting of the diamagnetic spectrum as the electric field increases. The spectral anticrossing is induced by the atomic core effect. The Stark spectrum also shows an obvious nonlinear quadratic behavior when the applied magnetic field varies strongly. All spectra are well explained by the full quantum calculation after taking the quantum defect effects of the channel n s up to n f into account.
A spectroscopic study of Rydberg states of helium (n = 30 and 45) in magnetic, electric and combined magnetic and electric fields with arbitrary relative orientations of the field vectors is presented. The emphasis is on two special cases where (i) the diamagnetic term is negligible and both paramagnetic Zeeman and Stark effects are linear (n = 30, B ≤ 120 mT and F = 0-78 V cm⁻¹), and (ii) the diamagnetic term is dominant and the Stark effect is linear (n = 45, B = 277 mT and F = 0-8 V cm⁻¹). Both cases correspond to regimes where the interactions induced by the electric and magnetic fields are much weaker than the Coulomb interaction, but much stronger than the spin-orbit interaction. The experimental spectra are compared to spectra calculated by determining the eigenvalues of the Hamiltonian matrix describing helium Rydberg states in the external fields. The spectra and the calculated energy-level diagrams in external fields reveal avoided crossings between levels of different m ₗ values and pronounced m ₁-mixing effects at all angles between the electric- and magnetic-field vectors other than 0. These observations are discussed in the context of the development of a method to generate dense samples of cold atoms and molecules in a magnetic trap following Rydberg-Stark deceleration.