Article
Physics, Multidisciplinary
Wenbing Li, Sebastian Wolf, Lukas Klein, Dmitry Budker, Christoph E. Duellmann, Ferdinand Schmidt-Kaler
Summary: We demonstrate the implementation of three-dimensional polarization gradient cooling (PGC) for trapped ions. The cooling method is robust against an elevated phonon occupation number and works continuously in different cooling regimes. However, the performance of PGC strongly depends on residual micromotion and the spectral impurity of the laser field.
NEW JOURNAL OF PHYSICS
(2022)
Article
Nuclear Science & Technology
Tetsutarou Oishi, Shigeru Morita, Daiji Kato, Izumi Murakami, Hiroyuki A. Sakaue, Yasuko Kawamoto, Motoshi Goto
Summary: The study successfully observed the magnetic-dipole (M1) lines of tungsten ions in the LHD, revealing a new phenomenon in fusion plasma experiments that could potentially improve tungsten diagnostics in ITER.
NUCLEAR MATERIALS AND ENERGY
(2021)
Article
Chemistry, Physical
Xu Han, Rui Deng, Botao Sun, Dayong Jiang, Man Zhao, Bin Yao, Yongfeng Li
Summary: We investigated the optical, electrical properties, and electronic band structures of band gap tunable TixSn1-xO2 alloy with dipole-forbidden transition. Experimental and first-principles calculation results showed that alloying Ti into SnO2 narrows the optical band gap of TixSn1-xO2, increases the electrical resistivity, and leads to strong deep-level emission associated with oxygen vacancy defects in photoluminescence spectra. The engineering of band gap in TixSn1-xO2 can control both the band gap and defects, tuning the electrical and optical properties significantly.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Israa Zeid, Nayla El-Kork, Wael Chmaisani, Mahmoud Korek
Summary: The electronic structure of the molecule LaNa with spin orbit effect has been studied using Multi-Reference Configuration Interaction (MRCI) calculations. Adiabatic potential energy curves, spectroscopic constants, and dipole moments have been calculated to evaluate the molecule's candidacy for laser cooling. The results provide important data for understanding the properties of LaNa and its potential applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Optics
Jun Jiang, Yun Ma, Xia Wang, Chen-Zhong Dong, Z. W. Wu
Summary: In this study, the static and dynamic polarizabilities of Ba+ ions were calculated using a relativistic semiempirical method. The tune-out wavelengths and magic wavelengths for various transitions were determined, with suggestions for high-precision measurements to determine the ratio of oscillator strengths.
Article
Physics, Multidisciplinary
Alex Thorman, Edward Litherland-Smith, Sheena Menmuir, Nick Hawkes, Martin O'Mullane, Ephrem Delabie, Bart Lomanowski, Josep Maria Fontdecaba, Shane Scully
Summary: After the installation of the ITER-like wall on the JET tokamak, there have been numerous observations of tungsten charge exchange transitions, including W39+ and W46+, which contaminate the long-established carbon measurement. The influence of these tungsten charge exchange lines can be mitigated by including them in the spectral fit, and neon-based charge exchange measurements are now preferred on JET.
Article
Materials Science, Multidisciplinary
Qiongyin Mai, Hanyu Zhou, Leming Ou
Summary: The combination depressant effect of calcium ions and calcium lignosulfonate (CLS) was found to effectively depress talc floating in the flotation process, enhancing the adsorption capacity and adsorption strength of CLS on the talc surface. This resulted in the formation of a [talc-Ca2+/Ca(OH)(+)-CLS] system by strong adsorption, improving the coverage rate of CLS on talc.
Article
Optics
Chilukoti Ashok, Himal Bhatt, S. Harinath Babu, Arijit Sharma, S. R. Vishwakarma, A. Mohan Babu, M. N. Deo
Summary: Hyperfine structure (hfs) investigations were performed on a forbidden transition of the Bi I emission spectral line in the visible region at 15,437.49 cm -1 using a Fourier Transform spectrometer. Electrodeless discharge lamps (EDL) containing BiI3 were used to generate the bismuth plasma. In these observations, all 6 components of electric quadrupole (AF = ±2) transitions and 12 components of magnetic dipole (AF = 0, ±1) transitions were detected for the first time. Magnetic dipole constant (A) and electric quadrupole constant (B) were derived for the combining levels.
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
(2023)
Article
Optics
Shasha Wang, Yongjin Li, Tianhui Wang, Jianbei Qiu, Zhengwen Yang, Jin Han, Qi Wang, Zhaoyi Yin, Zhiguo Song
Summary: The Yb3+Eu3+ co-doped BiOCl crystal, synthesized via solid state reaction, showed band-to-band multiphoton excitation and photopolarization under 980nm laser, leading to tunable photopolarization on Eu3+ ions. The emission intensity ratio and Stark splitting of Eu3+ ions could be tailored simultaneously by adjusting pumping power or Yb3+ ion doping level, showing an opposite trend. This research offers new insights into material-light interaction and tailored lanthanide ions for opto-electric multifunctional devices design.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Physical
K. V. Kazakov, A. A. Vigasin
Summary: The theory of vibrational magnetism in symmetric linear molecules is reviewed and extended using an isolated CO2 molecule as an example. The study explores unconventional spectral lines observed in the Martian atmosphere near 3.3 μm, which are believed to be magnetic transitions within the v(2) + v(3) absorption band in (CO2)-C-12-O-16. Results suggest that further examination is needed for the assignment of these spectral lines, as their characteristics exceed the theoretically expected values for magnetic-dipole transitions.
Article
Chemistry, Physical
Boxing Zhu, James N. Bull, MingChao Ji, Henning Zettergren, Mark H. Stockett
Summary: This study measured the unimolecular dissociation and infrared radiative cooling rates of cationic 1-hydroxypyrene and 1-bromopyrene using a cryogenic electrostatic ion beam storage ring. A numerical approach was developed to analyze the time dependence of the dissociation rate and determine the absolute scaling of the radiative cooling rate coefficient. The results showed that radiative cooling competes with dissociation below critical total vibrational energies, which has important implications for astrochemical models and energy dissipation.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Zihuan Jiang, Yuyuan Qian, Pengcheng Xu, Nadir Khan, Shiyan Meng, Ben Niu, Ling Zhang, Xiaobin Ding, Liangyu Huang, Bingsheng Tu, Yunqing Fu, Yaming Zou, Ke Yao
Summary: This study presents a spectroscopic investigation of optical spectra of Ca-like Br15+, Kr16+, Zr20+, and Rh25+ ions at an electron beam ion trap. Ten spectral lines emitted from these ions were identified in the 200-700 nm region, eight of which were reported for the first time. The calculations of energy levels and transition rates were performed using the multiconfiguration Dirac-Hartree-Fock and relativistic configuration interaction methods, considering the Breit interaction and QED effects, and accounting for core-valence and core-core correlations. The results showed good agreement between theory and experiment, and the accurate experimental data can be used as reference for further calculations.
Article
Optics
Yajing Li, Yintao Wang, Junyu Fan, Ran Si, Jiguang Li, Mingwu Zhang, Liangyu Huang, Jun Xiao, Yaming Zou, Baoren Wei, Ke Yao
Summary: The study observed the 4s(2)4p P-2(3/2)-P-2(1/2) magnetic dipole transition in Mo11+ and Ru13+ ions, obtaining precise wavelengths through internal and external calibration methods, and significantly improving the experimental uncertainty compared to previous results.
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2021)
Article
Mathematics, Interdisciplinary Applications
Abdel-Haleem Abdel-Aty, A-B A. Mohamed, H. Eleuch
Summary: This paper explores the nonlinear dynamics of two dipole-coupled-trapped ions in the Lamb-Dicke regime. The correlations between the trapped ions are quantified using Bell function, uncertainty-induced nonlocality, and concurrence. The effects of Lamb-Dicke nonlinearity, intrinsic decoherence, and trapped ions coupling are investigated. Different nonlocal correlations are found, and can be controlled. The Lamb-Dicke nonlinearity and trapped ions coupling enhance the nonlocal correlations in the absence of decoherence, while the intrinsic decoherence reduces and stabilizes them. Strong Lamb-Dicke nonlinearity reduces the decoherence effects.
FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY
(2022)
Article
Physics, Multidisciplinary
E. Trimby, H. Hirzler, H. Fuerst, A. Safavi-Naini, R. Gerritsma, R. S. Lous
Summary: This study presents numerical simulations on trapped ion buffer gas cooling using an ultracold atomic gas, exploring various trap parameters and driving schemes. The results show that ion energies are similar across different traps, even with experimental imperfections. Quantum mechanics cannot prevent micromotion-induced heating in atom-ion collisions. Buffer gas cooling is a viable alternative for cold controlled quantum chemistry and charged impurity physics, competing with sub-Doppler cooling techniques.
NEW JOURNAL OF PHYSICS
(2022)
Article
Acoustics
Richard J. Hendricks, Filip Ozimek, Krzysztof Szymaniec, Bartlomiej Nagorny, Piotr Dunst, Jerzy Nawrocki, Scott Beattie, Bin Jian, Kurt Gibble
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL
(2019)
Article
Optics
Klaas Bergmann, Hanns-Christoph Naegerl, Cristian Panda, Gerald Gabrielse, Eduard Miloglyadov, Martin Quack, Georg Seyfang, Gunther Wichmann, Silke Ospelkaus, Axel Kuhn, Stefano Longhi, Alexander Szameit, Philipp Pirro, Burkard Hillebrands, Xue-Feng Zhu, Jie Zhu, Michael Drewsen, Winfried K. Hensinger, Sebastian Weidt, Thomas Halfmann, Hai-Lin Wang, Gheorghe Sorin Paraoanu, Nikolay V. Vitanov, Jordi Mompart, Thomas Busch, Timothy J. Barnum, David D. Grimes, Robert W. Field, Mark G. Raizen, Edvardas Narevicius, Marcis Auzinsh, Dmitry Budker, Adriana Palffy, Christoph H. Keitel
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2019)
Article
Physics, Applied
M. Collombon, C. Chatou, G. Hagel, J. Pedregosa-Gutierrez, M. Houssin, M. Knoop, C. Champenois
PHYSICAL REVIEW APPLIED
(2019)
Article
Instruments & Instrumentation
Scott Beattie, Bin Jian, John Alcock, Marina Gertsvolf, Rich Hendricks, Krzysztof Szymaniec, Kurt Gibble
Article
Instruments & Instrumentation
K. Burrows, R. J. Hendricks, K. Szymaniec, K. Gibble, S. Beattie, B. Jian
Article
Physics, Multidisciplinary
Cyrille Solaro, Steffen Meyer, Karin Fisher, Julian C. Berengut, Elina Fuchs, Michael Drewsen
PHYSICAL REVIEW LETTERS
(2020)
Article
Quantum Science & Technology
M. Marchenay, J. Pedregosa-Gutierrez, M. Knoop, M. Houssin, C. Champenois
Summary: RF linear multipole traps are highly sensitive to mis-positioning of their electrodes, leading to symmetry breaking and additional local minima in the trapping potential. This study analytically describes the RF-potential of a realistic octupole trap and proposes an equation for compensating electrode deviations. Fine-tuning the amplitude of the RF voltage applied on each electrode can mitigate geometrical defects, and an analytical equation for the potential allows designing the set of RF-voltages required for this compensation.
QUANTUM SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
A. Poindron, J. Pedregosa-Gutierrez, C. Jouvet, M. Knoop, C. Champenois
Summary: This study demonstrates through molecular dynamics simulations how a laser-cooled ion cloud in a linear radio-frequency trap can achieve ultimate sensitivity for detecting individual charged heavy molecular ions.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Shanshan Ding, Michael Drewsen, Jan J. Arlt, G. M. Bruun
Summary: We investigate the interaction between two trapped ions mediated by a quantum degenerate Bose or Fermi gas. Through perturbation theory and diagrammatic theory, we analytically demonstrate the behavior of the mediated interaction under different conditions and highlight its significant impact on the ion-ion interaction and ion phonon frequencies.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
A. Poindron, J. Pedregosa-Gutierrez, C. Champenois
Summary: Through numerical simulations, we find that the bistable behavior of temperature in large ion clouds trapped in radio-frequency traps is determined by the oscillating field amplitude and ion number. The heating rate mainly depends on the oscillating field rather than the ion number. We also discuss the competition between radio-frequency heating and laser cooling, and propose scenarios to detect and quantify perturbations using the threshold effect.
Article
Optics
Emilie H. Clausen, Vincent Jarlaud, Karin Fisher, Steffen Meyer, Cyrille Solaro, Michael Drewsen
Summary: In this article, we discuss the prospect of using the recoil associated with absorption and emission of photons to perform spectroscopy of a single molecular ion. We present a general framework for simulating the expected photon recoil spectra in regimes where either the natural transition linewidth or the spectral width of the exciting light source exceeds the motional frequencies of the two-ion system. We exemplify the framework with two complementary cases.
Article
Optics
Boyan T. Torosov, Michael Drewsen, Nikolay V. Vitanov
Article
Physics, Fluids & Plasmas
Michael Drewsen, Alberto Imparato
Article
Optics
Thomas Laupretre, Rasmus B. Linnet, Ian D. Leroux, Haggai Landa, Aurelien Dantan, Michael Drewsen
