Article
Optics
Niccolo Bigagli, Daniel W. Savin, Sebastian Will
Summary: We present a scheme for laser cooling of C-12(2) and provide calculations for the branching ratios of cycling and repumping transitions. Our results show that C-2 cooling, using specific bands, is achievable under realistic experimental conditions. This work opens up possibilities for cooling molecules with carbon-carbon bonds and potentially enables quantum control of organic molecules.
Article
Optics
Gunjan Verma, Enlong Wang, Joep Assendelft, Nicola Poli, Gabriele Rosi, Guglielmo Maria Tino, Leonardo Salvi
Summary: This study reports a simple master-slave injection-locked laser system capable of generating high-power, narrow-linewidth laser sources in the visible range for the magneto-optical trapping of strontium atoms. The system offers several advantages, such as low cost, design flexibility, and low electrical power consumption, making it an effective solution for space-based experiments.
APPLIED PHYSICS B-LASERS AND OPTICS
(2022)
Article
Physics, Multidisciplinary
S. F. Vazquez-Carson, Q. Sun, J. Dai, D. Mitra, T. Zelevinsky
Summary: We demonstrate optical cycling and laser cooling of a cryogenic buffer-gas beam of calcium monohydride (CaH) molecules. We measure vibrational branching ratios for laser cooling transitions and successfully lower the transverse temperature of a molecular beam of CaH. This work provides a clear pathway for the production of ultracold hydrogen gas.
NEW JOURNAL OF PHYSICS
(2022)
Article
Optics
Tomoya Akatsuka, Koji Hashiguchi, Tadahiro Takahashi, Noriaki Ohmae, Masao Takamoto, Hidetoshi Katori
Summary: This study reports three-stage laser cooling of Sr atoms, achieving cooling of Sr-87 atoms and one dimensional polarization gradient cooling of Sr-88 atoms. The Sr-87 atoms were precoolied in a magneto-optical trap operated on multiple transitions, while the Sr-88 atoms were cooled down to 0.22(18) µK using a specific transition. The research also discusses the potential for continuous generation of ultracold Sr atoms combined with a state transfer technique.
Article
Chemistry, Physical
Ali Mostafa, Nayla El -Kork, Israa Zeid, Mahmoud Korek
Summary: This study presents calculations using the CASSCF/MRCI approach to investigate laser cooling of Barium Monohalide diatomic molecules, showing that BaI is a promising candidate for Doppler laser cooling experiments.
COMPUTATIONAL AND THEORETICAL CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
C. J. Baker, W. Bertsche, A. Capra, C. Carruth, C. L. Cesar, M. Charlton, A. Christensen, R. Collister, A. Cridland Mathad, S. Eriksson, A. Evans, N. Evetts, J. Fajans, T. Friesen, M. C. Fujiwara, D. R. Gill, P. Grandemange, P. Granum, J. S. Hangst, W. N. Hardy, M. E. Hayden, D. Hodgkinson, E. Hunter, C. A. Isaac, M. A. Johnson, J. M. Jones, S. A. Jones, S. Jonsell, A. Khramov, P. Knapp, L. Kurchaninov, N. Madsen, D. Maxwell, J. T. K. McKenna, S. Menary, J. M. Michan, T. Momose, P. S. Mullan, J. J. Munich, K. Olchanski, A. Olin, J. Peszka, A. Powell, P. Pusa, C. O. Rasmussen, F. Robicheaux, R. L. Sacramento, M. Sameed, E. Sarid, D. M. Silveira, D. M. Starko, C. So, G. Stutter, T. D. Tharp, A. Thibeault, R. I. Thompson, D. P. van der Werf, J. S. Wurtele
Summary: Laser cooling, a widely-used technique in various fields, has now been successfully applied to anti-hydrogen atoms, leading to significant advancements in antimatter research. By using pulsed, narrow-linewidth laser radiation, researchers were able to Doppler-cool a sample of magnetically trapped anti-hydrogen, demonstrating the ability to manipulate the motion of anti-atoms with laser light and opening up groundbreaking opportunities for future experiments.
Review
Physics, Multidisciplinary
Florian Schreck, Klaasjan van Druten
Summary: Laser cooling is a crucial initial step for achieving Bose-Einstein condensation and quantum degeneracy in atomic gases, bringing them close to absolute zero. Ongoing development in laser cooling methods has enabled more elements to reach quantum degeneracy, leading to new experimental opportunities. Improved techniques like reaching Bose-Einstein condensation purely through laser cooling and continuous condensation are opening up new avenues for creating quantum gases.
Article
Physics, Multidisciplinary
Haowei Xu, Guoqing Wang, Changhao Li, Hua Wang, Hao Tang, Ariel Rebekah Barr, Paola Cappellaro, Ju Li
Summary: The initialization of nuclear spin to its ground state is challenging due to its small energy scale compared with thermal energy, even at cryogenic temperature. In this Letter, an optonuclear quadrupolar effect is proposed, where two-color optical photons can efficiently interact with nuclear spins. Leveraging such an optical interface, nuclear magnons, the collective excitations of nuclear spin ensemble, can be cooled down optically, which could facilitate the application of nuclear spins in quantum information science.
PHYSICAL REVIEW LETTERS
(2023)
Editorial Material
Physics, Multidisciplinary
Rohan D. Glover
Summary: Atom trap trace analysis is a powerful technique for detecting trace radioisotopes of noble gases, with the potential to be extended to other metal isotopes demonstrated by its successful application to a calcium isotope.
Article
Spectroscopy
Niu-Zao Yan, Chuan-Lu Yang, Zhao-Peng Sun, Mei-Shan Wang, Xiao-Guang Ma
Summary: Researchers focus on constructing a direct laser cooling scheme with triplet-triplet transition involving intervening electronic states, using NH molecule as a prototype. This scheme is established based on the X-3 Sigma transition, showing superior cooling effect with potential for cooling NH molecule to a Doppler temperature of 20.2 mu K.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Analytical
Maki Honda, Martin Martschini, Oscar Marchhart, Alfred Priller, Peter Steier, Robin Golser, Tetsuya K. Sato, Tsukada Kazuaki, Aya Sakaguch
Summary: The sensitive analysis of Sr-90 with accelerator mass spectrometry (AMS) allows for measurement of environmental samples with high precision and a low detection limit. The results obtained from analyzing IAEA samples demonstrate the reliability of this method in environmental radiology.
ANALYTICAL METHODS
(2022)
Article
Spectroscopy
Yuliya Osika, Maksim Shundalau
Summary: The potential energy curves of the ground and five low-lying excited terms of the RaF molecule were calculated using the Fock-space relativistic coupled theory. Various spectroscopic constants were predicted and a scheme for direct laser cooling was proposed. The study suggests that the A(2)Pi(1/2) -> X-2 Sigma(+) channel in the RaF molecule is an almost ideal case for direct laser cooling.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Multidisciplinary Sciences
Nathaniel B. Vilas, Christian Hallas, Loic Anderegg, Paige Robichaud, Andrew Winnicki, Debayan Mitra, John M. Doyle
Summary: In this study, the successful magneto-optical trapping of a polyatomic molecule, calcium monohydroxide (CaOH), demonstrates the feasibility and practicality of laser cooling and trapping for polyatomic species. This achievement has significant implications for various applications in quantum science.
Article
Multidisciplinary Sciences
Bethan Linscott, Alistair W. G. Pike, Diego E. Angelucci, Matthew J. Cooper, James S. Milton, Henrique Matias, Joao Zilhao
Summary: Using an optimized method, highly spatially resolved strontium isotope analysis was conducted on the teeth of two Middle Paleolithic Neanderthals and one Late Magdalenian human from the Almonda karst system in Torres Novas, Portugal. The results show that the Middle Paleolithic individuals had a subsistence territory of approximately 600 km2, while the Late Magdalenian individual had a smaller territory of approximately 300 km2. The difference in territory size is believed to be due to an increase in population density during the Late Upper Paleolithic.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Optics
Ye Zhang, Qixin Liu, Xiaohu Fu, Jianfang Sun, Zhen Xu, Yuzhu Wang
Summary: The developed deep-ultraviolet laser for laser cooling of mercury atoms demonstrates high power stability and low noise level, suitable for use in magneto-optical traps and optical lattice clocks.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Maximilian Sohmen, Claudia Politi, Lauritz Klaus, Lauriane Chomaz, Manfred J. Mark, Matthew A. Norcia, Francesca Ferlaino
Summary: In this study, the finite-temperature properties of dipolar supersolids formed by cooling through direct evaporation were explored. The research revealed that as the atomic system cools towards quantum degeneracy, it transitions from a thermal gas to a crystalline state with periodic density modulation, followed by a transition to a supersolid state with long-range phase coherence.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
T. Bland, E. Poli, C. Politi, L. Klaus, M. A. Norcia, F. Ferlaino, L. Santos, R. N. Bisset
Summary: A robust supersolid state can be formed in a two-dimensional system by directly evaporative cooling into the supersolid phase. The research provides a theoretical basis for the formation process of two-dimensional supersolids and defines a practical path to the formation of large two-dimensional supersolid arrays.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Matthew A. Norcia, Elena Poli, Claudia Politi, Lauritz Klaus, Thomas Bland, Manfred J. Mark, Luis Santos, Russell N. Bisset, Francesca Ferlaino
Summary: Angular oscillations can serve as a useful probe for superfluid properties, but in systems with 2D structure, the frequency of angular oscillations remains nearly unchanged even with significant alterations in superfluidity, suggesting that they may not always provide a robust experimental probe for superfluidity with typical experimental protocols.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Simon B. Jaeger, Tom Schmit, Giovanna Morigi, Murray J. Holland, Ralf Betzholz
Summary: We present a general approach to derive Lindblad master equations for subsystems coupled to dissipative bosonic modes. We apply this approach to the dissipative Dicke model and successfully predict the Dicke phase transition and quantum metastability. The performance of our formalism is validated by comparing with exact diagonalization and numerical integration results.
PHYSICAL REVIEW LETTERS
(2022)
Editorial Material
Automation & Control Systems
Marco M. Nicotra, Jieqiu Shao, Joshua Combes, Anne Cross Theurkauf, Penina Axelrad, Liang-Ying Chih, Murray Holland, Alex A. Zozulya, Catie K. LeDesma, Kendall Mehling, Dana Z. Anderson
IEEE CONTROL SYSTEMS MAGAZINE
(2023)
Article
Optics
John Drew Wilson, Simon B. Jaeger, Jarrod T. Reilly, Athreya Shankar, Maria Luisa Chiofalo, Murray J. Holland
Summary: The creation and manipulation of quantum entanglement is crucial for improving precision measurements. This study introduces a method that goes beyond one-axis twisting to generate squeezing and entanglement across two distinct degrees of freedom. By using a nonlinear Hamiltonian to generate dynamics in SU(4), more rich context of quantum entanglement is achieved.
Article
Optics
Jarrod T. Reilly, Simon B. Jaeger, John Cooper, Murray J. Holland
Summary: This study proposes a method to adiabatically control an atomic ensemble using a decoherence-free subspace (DFS) within a dissipative cavity. By interfering the emission amplitude of the ensemble with an injected field, a specific eigenstate of the system's Lindblad jump operators can be engineered. Unlike previous adiabatic DFS proposals, this scheme allows for the creation of a DFS in the presence of collective decoherence, enabling faster state preparation.
Article
Optics
Gage W. Harmon, Jarrod T. Reilly, Murray J. Holland, Simon B. Jaeger
Summary: The study presents a theoretical description of a lasing scheme for atoms with three internal levels in a V configuration interacting with an optical cavity, demonstrating a closed lasing cycle on a dipole-forbidden transition. Utilizing stability analysis and mean-field Floquet method, the lasing threshold, emission frequency, and bistable solutions are determined. The research sheds light on the complex physics of cold atom lasers with narrow line transitions through simple methods.
Article
Physics, Multidisciplinary
John P. Bartolotta, Simon B. Jager, Jarrod T. Reilly, Matthew A. Norcia, James K. Thompson, Graeme Smith, Murray J. Holland
Summary: In the field of light-matter interactions, it is commonly assumed that classical light fields interacting with quantum particles undergo negligible changes and do not contain information about the particles. This study develops a Gedanken experiment to investigate the validity of this assumption, quantifying the alteration of the light field and the transfer of entropy using Bayesian inference. The results show that in the strong coupling limit, information about the particle state can be fully encoded in the light field.
PHYSICAL REVIEW RESEARCH
(2022)
Article
Optics
E. Poli, T. Bland, C. Politi, L. Klaus, M. A. Norcia, F. Ferlaino, R. N. Bisset, L. Santos
Summary: In this study, we investigate theoretically the supersolidity in three-dimensional dipolar Bose-Einstein condensates, focusing on the impact of trap geometry on the dimensionality of resulting droplet arrays. We found that supersolidity is well established in one-dimensional arrays and may also be favorable in two-dimensional arrays with proper scaling of atom number to trap volume. By developing a tractable variational model, we were able to study droplet crystals and their excitations, and suggest potential creation of exotic ring and stripe states with experimentally feasible parameters. This work sets the stage for future research on two-dimensional dipolar supersolids in realistic settings.
Article
Optics
Simon B. Jager, Haonan Liu, John Cooper, Murray J. Holland
Summary: The study focuses on the collective emission of a beam of atomic dipoles into an optical cavity, specifically looking at the effect of a finite detuning between the atomic transition frequency and the cavity resonance frequency. By developing a theoretical description of the coupled atom-cavity dynamics, the analysis includes stationary atomic configurations and the cavity pulling coefficient. The study finds that if the cavity linewidth is much larger than the collective linewidth of the atomic beam, the pulling is small.
Article
Physics, Multidisciplinary
Juan A. Muniz, Dylan J. Young, Julia R. K. Cline, James K. Thompson
Summary: The study demonstrates the direct quantum nondemolition detection of millihertz linewidth optical atomic transition and determines the natural linewidth of an ultranarrow transition in Sr-87. This provides crucial information for the performance of atomic clocks and opens up possibilities for continuous frequency measurements and laser stabilization.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Optics
Matthew A. Norcia
Summary: This new method autonomously assembles atoms in optical tweezers or lattice sites by utilizing tunneling and ground-state laser cooling, avoiding the limitations of imaging and evaporative cooling in traditional methods. The substantial speed improvement makes it particularly suitable for preparing arbitrary initial conditions for Bose-Hubbard or Rydberg interacting systems.