Review
Physics, Multidisciplinary
Shao-Yang Dai, Fa-Song Zheng, Kun Liu, Wei-Liang Chen, Yi-Ge Lin, Tian-Chu Li, Fang Fang
Summary: Cold atom clocks have made significant progress in the last two decades, achieving uncertainties in the range of 10 to the power of 16 or lower. Apart from their applications in metrology and navigation, they have also become important tools in basic scientific research.
Article
Physics, Multidisciplinary
Zhen Zhang, Jing-Feng Xiang, Bin Xu, Pan Feng, Guang-Wei Sun, Yi-Ming Meng, Si-Min-Da Deng, Wei Ren, Jin-Yin Wan, De-Sheng Lue
Summary: We designed, assembled, and tested a reliable laser system for Rb-87 cold atom fountain clocks. The laser system is divided into four convenient modules for installation, adjustment, maintenance, and replacement. The optical components in each module are fixed on a baseplate with glue and screws for structural stability. The laser system demonstrates mechanical stability with less than 5% change in output power after a random vibration test, and thermal stability with less than 20% change in laser power during thermal cycles.
Article
Physics, Multidisciplinary
Xiaochi Liu, Ning Ru, Junyi Duan, Peter Yun, Minghao Yao, Jifeng Qu
Summary: We propose a coherent population trapping clock system based on laser-cooled 87 Rb atoms, achieving high-frequency stability measurement. The cold atom interrogation method improves the long-term frequency stability of the clock and shows potential for developing compact/miniature cold atoms clocks.
Article
Physics, Multidisciplinary
J. Andrijauskas, J. Vogel, A. Mokhberi, F. Schmidt-Kaler
Summary: In this study, Rydberg series spectroscopy was performed on a single trapped Ca-40(+) ion to determine the ionization energy and quantum defect values, confirming their scaling properties for Rydberg ions. The precise spectroscopic data obtained can be used for unambiguous addressing of Rydberg levels of Ca+ ions, further facilitating quantum information processing.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Jun-Ru Shi, Xin-Liang Wang, Fan Yang, Yang Bai, Yong Guan, Si-Chen Fan, Dan-Dan Liu, Jun Ruan, Shou-Gang Zhang
Summary: In this study, the magnetic field requirements for atomic adiabatic transition in the caesium atomic fountain clock were analyzed. The influence of the Majorana atomic transition on the atomic state was calculated using a quantum method. The relationship between the Majorana transition frequency shift and the magnetic field at the entrance of the magnetic shielding was measured and found to be 4.57 x 10(-18).
Article
Quantum Science & Technology
C. J. Martoff, F. Granato, V Palmaccio, X. Yu, P. F. Smith, E. R. Hudson, P. Hamilton, C. Schneider, E. Chang, A. Renshaw, F. Malatino, P. D. Meyers, B. Lamichhane
Summary: This project aims to develop a high-precision laboratory-scale experiment to search for very weakly coupled sterile neutrinos in the mass range extending from 5-10 keV/c(2) to several 100 keV/c(2). The experiment utilizes K-capture events in Cs-131 atoms suspended in vacuum by a magneto-optical trap (MOT) and has the potential to reach sterile neutrino mixing angles down to sin(2) theta similar to 10(-4). Detailed calculations and simulations of significant background processes have been conducted.
QUANTUM SCIENCE AND TECHNOLOGY
(2021)
Article
Optics
A. Medina-Herrera, C. A. Ortiz, E. De Carlos-Lopez, J. M. Lopez-Romero
Summary: We present a novel approach to determine if a cloud of cold atoms has a unique and well-defined temperature. When the velocity distribution follows a Gaussian distribution, the temperature can be determined using the width of the velocity distribution. However, if the velocity distribution deviates from a Gaussian distribution, additional considerations are needed to measure the temperatures of two groups of atoms in the cloud, and an uncertainty evaluation is provided.
Article
Optics
Igor L. Glukhov, Aleksandr A. Kamenski, Vitaly D. Ovsiannikov, Vitaly G. Palchikov
Summary: This research focuses on the measurement and calculation of microwave and radio-frequency radiation parameters based on the quantum-optical approach. The frequencies and matrix elements of transitions between Rydberg states are determined, and the approximation expressions provide accurate evaluation of these parameters.
Article
Chemistry, Multidisciplinary
Maria Allegrini, Ennio Arimondo, Luis A. Orozco
Summary: The spectroscopic hyperfine constants for all alkali atoms are reported, with a focus on long-lived atomic isotopes from lithium to cesium. The measured data for ground states of all available isotopes of francium are also listed. The study presents results obtained since the beginning of laser investigations and performs global analyses based on scaling laws and hyperfine anomalies.
JOURNAL OF PHYSICAL AND CHEMICAL REFERENCE DATA
(2022)
Review
Chemistry, Multidisciplinary
Eunseung Hwang, Joonmyung Choi, Sukjoon Hong
Summary: Laser technology as a cutting-edge process has unique advantages in the semiconductor, display, and thin film industries. Laser-assisted vacuum processes broaden the usable range of process parameters, directly improving material properties, product precision, and device performance.
Editorial Material
Multidisciplinary Sciences
Yukari Matsuo
Summary: High-precision measurements of antiprotonic helium immersed in superfluid helium demonstrate that the same precision can be achieved for exotic atoms containing antimatter. This immersion technique could be used for studying dark matter with other atoms.
Article
Physics, Multidisciplinary
Timo Fleig, David DeMille
Summary: This study explores the possibilities of a next-generation electron-electric-dipole-moment experiment using ultracold heteronuclear diatomic molecules, focusing on the sensitivity of molecules assembled from radium and silver atoms to CP violation-induced P, T-violating physics. The study proposes a mechanism to explain the finding and discusses the prospects for an electron EDM search using optically trapped RaAg molecules, suggesting that this system holds promise for rapid progress in the search for new sources of CP violation.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Felix Kogel, Marian Rockenhauser, Ralf Albrecht, Tim Langen
Summary: Theoretical investigation of laser cooling in fermionic barium monofluoride ((BaF)-Ba-137) molecules has demonstrated the feasibility of optical cycling, sub-Doppler cooling, and bichromatic forces under realistically achievable experimental conditions.
NEW JOURNAL OF PHYSICS
(2021)
Article
Physics, Multidisciplinary
Lei Han, Fang Fang, Wei-Liang Chen, Kun Liu, Shao-Yang Dai, Ya-Ni Zuo, Tian-Chu Li
Summary: This study aims to improve the signal to noise ratio (SNR) and short-term stability of cesium atomic fountain clocks through the method of two-laser optical pumping. By adjusting the optical pumping method to prepare more cold atoms in the clock state, the detection signal has been significantly increased and the clock transition probability's SNR and short-term stability have been improved accordingly.
Article
Optics
Xin Wang, Yuan Sun, Liang Liu
Summary: Cold atom quantum sensing utilizing isotropic laser cooling is a promising area of research that offers advantages such as compactness and robustness. The study presents a specially tailored isotropic laser cooling system designed for quantum sensing applications, demonstrating improved detection processes and quantitatively deduced laser strength. Characterization of the system's properties and performance enhancements for future developments in quantum sensing and precision measurements are highlighted.
Article
Physics, Multidisciplinary
Alok K. Singh, Vasant Natarajan
NEW JOURNAL OF PHYSICS
(2015)
Article
Physics, Multidisciplinary
Sapam Ranjita Chanu, Ketan D. Rathod, Vasant Natarajan
Article
Optics
Pushpander Kumar, Alok K. Singh, Vineet Bharti, Vasant Natarajan, Kanhaiya Pandey
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2018)
Article
Physics, Multidisciplinary
K. D. Rathod, Alok K. Singh, Vasant Natarajan
Article
Optics
Alok K. Singh, Lal Muanzuala, Atanu K. Mohanty, Vasant Natarajan
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2012)
Article
Optics
Sapam Ranjita Chanu, Alok K. Singh, Boris Brun, Kanhaiya Pandey, Vasant Natarajan
OPTICS COMMUNICATIONS
(2011)
Article
Optics
Alok K. Singh, Lal Muanzuala, Vasant Natarajan
Article
Optics
Alok K. Singh, D. Angom, Vasant Natarajan
Article
Physics, Multidisciplinary
K. D. Rathod, P. K. Singh, Vasant Natarajan
PRAMANA-JOURNAL OF PHYSICS
(2014)
Proceedings Paper
Engineering, Electrical & Electronic
Markus Gellesch, Richard Barron, Jonathan M. Jones, Alok Singh, Qiushuo Sun, Kai Bongs, Yeshpal Singh
2020 JOINT CONFERENCE OF THE IEEE INTERNATIONAL FREQUENCY CONTROL SYMPOSIUM AND INTERNATIONAL SYMPOSIUM ON APPLICATIONS OF FERROELECTRICS (IFCS-ISAF)
(2020)
Review
Optics
Markus Gellesch, Jonathan Jones, Richard Barron, Alok Singh, Qiushuo Sun, Kai Bongs, Yeshpal Singh
ADVANCED OPTICAL TECHNOLOGIES
(2020)
Article
Multidisciplinary Sciences
Ketan D. Rathod, Vasant Natarajan