Precision measurements with cold atoms and trapped ions*

Zhang, Qiuxin; Wang, Yirong; Zhu, Chen; Wang, Yu-Xin; Xiang, Zhang; Gao, Kaixiong; Zhang, Wei

doi:10.1088/1674-1056/aba9c6

Cited by 8 publications

(4 citation statements)

References 198 publications

(271 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This difference makes it possible to judge the structure of ultrashort laser pulses. For experimental verification and usage, the quantum state engineering of trapped atomic particles developed in recent decades [51][52][53] can be proposed.…”

Section: Excitation Of a Two-level Atom Placed At The Center Of A Col...mentioning

confidence: 99%

Atomic Processes in Plasmas and Gases

2022

View full text Add to dashboard Cite

Commons Attribution (CC BY) license, which allows users to download, copy and build upon published articles, as long as the author and publisher are properly credited, which ensures maximum dissemination and a wider impact of our publications. About the Editor Eugene Oks EugeneOks received his Ph.D. degree from the Moscow Institute of Physics and Technology and, later, the highest degree of Doctor of Sciences from the Institute of General Physics of the Academy of Sciences of the USSR by the decision of the Scientific Council led by the Nobel Prize winner and academician A.M. Prokhorov. According to the Statute of the Doctor of Sciences degree, this highest degree is awarded only to the most outstanding Ph.D. scientists who founded a new research field of a great interest. Oks worked in Moscow (USSR) as the head of a research unit at the Center for Studying Surfaces and Vacuum, then-at the Ruhr University in Bochum (Germany) as an invited professor, and for the last 30 plus years-at the Physics Department of the Auburn University (USA) as a Professor. He conducted research in five areas: atomic and molecular physics, astrophysics, plasma physics, laser physics, and nonlinear dynamics. He founded/co-founded and developed new research fields, such as intra-Stark spectroscopy (a new class of nonlinear optical phenomena in plasmas), masing without inversion (advanced schemes for generating/amplifying coherent microwave radiation), and quantum chaos (nonlinear dynamics in the microscopic world).He also developed a large number of advanced spectroscopic methods for diagnosing various laboratory and astrophysical plasmas-methods that are now used by many experimental groups around the world. He recently revealed that there are two flavors of hydrogen atoms, as proven by the analysis of atomic experiments; there is also a possible astrophysical proof-from observations of the 21 cm radio line from the early Universe. He showed that dark matter, or at least a part of it, can be represented by the second flavor of hydrogen atoms. He published about 550 papers and 11 books, including the books Plasma Spectroscopy:

show abstract

Section: Excitation Of a Two-level Atom Placed At The Center Of A Col...mentioning

confidence: 99%

Atomic Processes in Plasmas and Gases

2022

View full text Add to dashboard Cite

show abstract

Section: Excitation Of a Two-level Atom Placed At The Center Of A Col...mentioning

confidence: 99%

Space-Time Coupling: Current Concept and Two Examples from Ultrafast Optics Studied Using Exact Solution of EM Equations

Popov

Виноградов

2021

Symmetry

View full text Add to dashboard Cite

Current approach to space-time coupling (STC) phenomena is given together with a complementary version of the STC concept that emphasizes the finiteness of the energy of the considered pulses. Manifestations of STC are discussed in the framework of the simplest exact localized solution of Maxwell’s equations, exhibiting a “collapsing shell”. It falls onto the center, continuously deforming, and then, having reached maximum compression, expands back without losing energy. Analytical solutions describing this process enable to fully characterize the field in space-time. It allowed to express energy density in the center of collapse in the terms of total pulse energy, frequency and spectral width in the far zone. The change of the pulse shape while travelling from one point to another is important for coherent control of quantum systems. We considered the excitation of a two-level system located in the center of the collapsing EM (electromagnetic) pulse. The result is again expressed through the parameters of the incident pulse. This study showed that as it propagates, a unipolar pulse can turn into a bipolar one, and in the case of measuring the excitation efficiency, we can judge which of these two pulses we are dealing with. The obtained results have no limitation on the number of cycles in a pulse. Our work confirms the productivity of using exact solutions of EM wave equations for describing the phenomena associated with STC effects. This is facilitated by rapid progress in the search for new types of such solutions.

show abstract

“…Laser cooling of the trapped ions to ultralow temperatures has made significant progress in various applications, including quantum computing, [1] quantum information, [2] optical clocks, [3,4] and high accuracy spectroscopy. [5] For direct laser cooling, however, a closed optical cycling transition between the energy levels is necessary and the transition frequencies are required to be accessible for available lasers.…”

Section: Introductionmentioning

confidence: 99%

Investigation of spatial structure and sympathetic cooling in the ⁹Be⁺–⁴⁰Ca⁺ bi-component Coulomb crystals

Zhang

et al. 2023

Chinese Phys. B

View full text Add to dashboard Cite

We study the spatial structure and sympathetic cooling of the bi-component Coulomb crystal (CC) which consists of approximate 450 9Be+ ions and 450 40Ca+ ions with a mass ratio of 0.225 in a segmented linear ion trap. By two-dimensional imaging of the bi-component CC, the 9Be+ ions are found to be surrounded by the 40Ca+ ions in the radial direction with a separation ratio of ~2.0, and the axial length of the 9Be+ ions occupied area is much larger than that of the 40Ca+ ions occupied area. Combined with the previous experimental results, the structure of the 9Be+-40Ca+ CC shows the larger the difference in the mass-charge ratio, the larger the separation between the two species. The comparison of the fluorescence spectra of the 9Be+ ions in the bi-component CC and the pure CC indicates that the 9Be+ ions can be sympathetically cooled and stably localized by the laser-cooled 40Ca+ ions during the recording of the fluorescence spectrum.

show abstract

Precision measurements with cold atoms and trapped ions*

Cited by 8 publications

References 198 publications

Atomic Processes in Plasmas and Gases

Atomic Processes in Plasmas and Gases

Space-Time Coupling: Current Concept and Two Examples from Ultrafast Optics Studied Using Exact Solution of EM Equations

Investigation of spatial structure and sympathetic cooling in the ⁹Be⁺–⁴⁰Ca⁺ bi-component Coulomb crystals

Contact Info

Product

Resources

About

Precision measurements with cold atoms and trapped ions*

Cited by 8 publications

References 198 publications

Atomic Processes in Plasmas and Gases

Atomic Processes in Plasmas and Gases

Space-Time Coupling: Current Concept and Two Examples from Ultrafast Optics Studied Using Exact Solution of EM Equations

Investigation of spatial structure and sympathetic cooling in the 9Be+–40Ca+ bi-component Coulomb crystals

Contact Info

Product

Resources

About

Investigation of spatial structure and sympathetic cooling in the ⁹Be⁺–⁴⁰Ca⁺ bi-component Coulomb crystals