Article
Multidisciplinary Sciences
Deng Pan, Hongxing Xu, F. Javier Garcia de Abajo
Summary: The technique of Doppler cooling is used to laser cool atoms, molecules, and nanoparticles by exploiting the Doppler shift associated with translational motion. The rotational Doppler effect can enable optical manipulation of the rotational motion of nanosystems, with rich and unexplored physics including a strong dependence on particle morphology. Exciting possibilities are opened up to control the rotational motion of nanosystems through rotational Doppler cooling and heating effects.
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
Chemistry, Physical
Debayan Mitra, Zack D. Lasner, Guo-Zhu Zhu, Claire E. Dickerson, Benjamin L. Augenbraun, Austin D. Bailey, Anastassia N. Alexandrova, Wesley C. Campbell, Justin R. Caram, Eric R. Hudson, John M. Doyle
Summary: Rapid and repeated photon cycling has enabled precision metrology and quantum information systems. However, extending optical cycling to structurally complex molecules presents challenges. Recent work has explored the possibility of cycling larger molecules, pointing to a promising path for full quantum control of complex molecules.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Spectroscopy
Huagang Xiao, Jiangnan Wang, Ruijie Zhang, Na Shan, Tao Gao
Summary: We theoretically investigate the possibility of laser cooling (SrCl)-Sr-87-Cl-35 molecule using vibrational and hyperfine spectroscopy. The potential energy curves and dipole moment are calculated, and the Franck - Condon factors and radiative lifetimes are predicted. The A(2)Pi(1/2) <-> X-2 Sigma(+)(1/2) transition is selected as the laser cooling cycle system, and the hyperfine spectroscopy and branching ratios are calculated.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Physics, Multidisciplinary
H. Liu, Z. Wang, L. Gao, Y. Huang, H. Tang, X. Zhao, W. Deng
Summary: In this study, a new optofluidic resonating phenomenon was reported, which naturally links optical radiation pressure, total internal reflection, capillary wave, and Rayleigh-Plateau instability. When a transparent liquid jet is radiated by a focused continuous wave laser beam, a highly ordered periodic jet breakup is unexpectedly triggered and maintained. The interaction of the laser beam with the liquid jet results in the periodic transmission of the laser beam and triggers the Rayleigh-Plateau instability.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Applied
Yanqi Zhang, Adam Hines, Dalziel J. Wilson, Felipe Guzman
Summary: This paper proposes an inertial sensor design that achieves high sensitivity and large dynamic range in the subhertz-frequency regime. It combines optical cavity readout systems with monolithically fabricated mechanical resonators to achieve high acceleration sensitivity. A high-sensitivity heterodyne interferometer is used to monitor the test mass with an extensive dynamic range for low-stiffness resonators. The bandwidth is tuned by optical feedback cooling to the test mass via radiation pressure interaction using an intensity-modulated laser. The overall system layout presents an integrated design that is compact and lightweight.
PHYSICAL REVIEW APPLIED
(2023)
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
Physics, Multidisciplinary
P. Kaebert, M. Stepanova, T. Poll, M. Petzold, S. Xu, M. Siercke, S. Ospelkaus
Summary: This paper investigates the feasibility of Zeeman slowing calcium monofluoride molecules from a cryogenic buffer gas cell, and confirms the excellent agreement between experimental results and theoretical predictions. The study demonstrates that efficient slowing and trapping of molecules can be achieved using Zeeman slowing technique with appropriate light illumination.
NEW JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Physical
Amal Madi, Nayla El-Kork, Israa Zeid, Mahmoud Korek
Summary: The adiabatic potential energy curves of the low lying electronic states of Be halide anions (BeX-) have been studied using computational methods. The spectroscopic parameters and rovibrational behavior of these electronic states were investigated, and new electronic states were discovered. It was found that the BeF- molecular anion has potential for Doppler laser cooling.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Geosciences, Multidisciplinary
Brice Noel, Guofinna Aoalgeirsdottir, Finnur Palsson, Bert Wouters, Stef Lhermitte, Jan M. Haacker, Michiel R. van den Broeke
Summary: A study found that the slowdown in mass loss of Icelandic glaciers since 2011 is related to a cooling signal in a certain area of the North Atlantic. This cooling signal mitigates atmospheric warming in Iceland, resulting in reduced glacier meltwater runoff and slower mass loss. However, as the cooling signal weakens, high mass loss rates in Icelandic glaciers are expected to resume.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Chemistry, Physical
Li Liu, Chuan-Lu Yang, Zhao-Peng Sun, Mei-Shan Wang, Xiao-Guang Ma
Summary: A new method based on ab initio calculations has been developed to rapidly identify suitable polyatomic molecules for direct laser cooling; the method relies on new criteria involving equilibrium geometrical structures and fundamental frequencies, replacing previous criteria based on Franck-Condon factors; the method has successfully identified molecules for direct laser cooling and established optical schemes for certain molecules.
PHYSICAL CHEMISTRY CHEMICAL 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
Optics
Manuel Alejandro Lefran Torres, Henry Fernandes Passagem, David Rodriguez Fernandez, Eduardo da Costa Paul, Cristian Adan Mojica Casique, Olivier Dulieu, Nadia Bouloufa-Maafa, Luis Gustavo Marcassa
Summary: We propose a theoretical approach for Zeeman slowing of a Rb-2 supersonic beam, utilizing transitions between rovibrational levels of the X-1 sigma(+)(g) electronic ground-state and the B-1 Pi(u) electronic excited state. By using optical transitions from v(X)(SIC)13, J(X)(SIC)13 to v(B)=0, including P (J(B)=J(X)-1) and Q (J(B)=J(X)) branches, we induce translational cooling. Monte-Carlo simulations show that the velocity of the molecules can be reduced from 500 m s(-1) to a few m s(-1) using a 1.2 m long Zeeman slower after scattering about 150 000 photons. Upon the completion of the slowing process, it is predicted that half of the molecules will be internally cooled in the v(X)=2, 3, J(X)=1 ground-state levels. Further optical pumping to the v(X)=0, J(X)=1 ground-state level could yield a molecular beam with cold translational, vibrational, and rotational degrees of freedom, making this approach potentially valuable in the cooling of various molecular species.
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2023)
Article
Optics
Yuqiang Hu, Fei Xie, Qihui Liu, Nan Wang, Jin Zhang, Yichen Liu, Yongquan Su, Yang Wang, Hao Chen, Zhenyu Wu
Summary: This article presents a fiber-integrated force sensor device for laser power measurement based on laser radiometric heat and radiation force sensing. The device determines laser intensity through the displacement of a movable mirror measured by an integrated Fabry-Perot interferometer. The device exhibits a non-linearity error of 0.02% and measurement uncertainty of 2.06% in the quasi-vacuum condition for CW laser illumination, and a non-linearity error of 0.37% and measurement uncertainty of 2.08% for pulsed lasers.
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.
Article
Quantum Science & Technology
N. J. Fitch, J. Lim, E. A. Hinds, B. E. Sauer, M. R. Tarbutt
Summary: Measurements of the electron's electric dipole moment (eEDM) can be significantly improved using ultracold YbF molecules, which can generate precise molecular beams through techniques such as magnetic focussing and laser trapping. Noise reduction and systematic effect control are important considerations in reaching the shot-noise limit of sensitivity for eEDM measurements.
QUANTUM SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
S. Jurgilas, A. Chakraborty, C. J. H. Rich, L. Caldwell, H. J. Williams, N. J. Fitch, B. E. Sauer, Matthew D. Frye, Jeremy M. Hutson, M. R. Tarbutt
Summary: In this study, mixtures of ultracold CaF molecules and Rb atoms were prepared in a magnetic trap for analyzing their inelastic collisions. The results indicate that the nature of collisions varies depending on the rotational states of the molecules involved.
PHYSICAL REVIEW LETTERS
(2021)
Article
Multidisciplinary Sciences
Pascal Scholl, Michael Schuler, Hannah J. Williams, Alexander A. Eberharter, Daniel Barredo, Kai-Niklas Schymik, Vincent Lienhard, Louis-Paul Henry, Thomas C. Lang, Thierry Lahaye, Andreas M. Laeuchli, Antoine Browaeys
Summary: The article introduces the use of synthetic systems for quantum simulation to solve many-body problems, discussing challenges faced by different platforms. By utilizing an array of atoms in optical tweezers, the study successfully implements a classic many-body problem and demonstrates the platform's versatility through exploring different system sizes.
Article
Quantum Science & Technology
X. Alauze, J. Lim, M. A. Trigatzis, S. Swarbrick, F. J. Collings, N. J. Fitch, B. E. Sauer, M. R. Tarbutt
Summary: Two-dimensional transverse laser cooling is utilized to create an ultracold YbF molecule beam, significantly increasing brightness and allowing for precise experiments with a statistical precision better than 10(-30) e cm, particularly for measuring the electron electric dipole moment.
QUANTUM SCIENCE AND TECHNOLOGY
(2021)
Article
Instruments & Instrumentation
James Greenberg, O. A. Krohn, Jason A. Bossert, Yomay Shyur, David Macaluso, N. J. Fitch, H. J. Lewandowski
Summary: The study focuses on producing high densities of molecules for low-temperature, ion-molecule reaction studies using traveling-wave Stark decelerators. The researchers managed to continuously decelerate ND3 molecules while addressing the control of high-voltage potentials. Different slowing schemes were tested to improve energy resolution for subsequent reaction studies, indicating the potential for achieving cold, energy-resolved ion-neutral reactions using a combined apparatus.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2021)
Article
Physics, Atomic, Molecular & Chemical
Chi Zhang, Chaoqun Zhang, Lan Cheng, Timothy C. Steimle, Michael R. Tarbutt
Summary: In this study, we theoretically investigated the impact of 4f electron excited states on laser cooling of YbF molecules. We found that the presence of 4f hole states hinders laser cooling and leads to molecule loss. We also identified a leakage phenomenon outside of the cooling cycle, which affects the cooling efficiency.
JOURNAL OF MOLECULAR SPECTROSCOPY
(2022)
Article
Quantum Science & Technology
G. Barontini, L. Blackburn, V. Boyer, F. Butuc-Mayer, X. Calmet, J. R. Crespo Lopez-Urrutia, E. A. Curtis, B. Darquie, J. Dunningham, N. J. Fitch, E. M. Forgan, K. Georgiou, P. Gill, R. M. Godun, J. Goldwin, V. Guarrera, A. C. Harwood, I. R. Hill, R. J. Hendricks, M. Jeong, M. Y. H. Johnson, M. Keller, L. P. Kozhiparambil Sajith, F. Kuipers, H. S. Margolis, C. Mayo, P. Newman, A. O. Parsons, L. Prokhorov, B. I. Robertson, J. Rodewald, M. S. Safronova, B. E. Sauer, M. Schioppo, N. Sherrill, Y. V. Stadnik, K. Szymaniec, M. R. Tarbutt, R. C. Thompson, A. Tofful, J. Tunesi, A. Vecchio, Y. Wang, S. Worm
Summary: This article discusses how a network of atomic and molecular clocks can be used to detect variations in fundamental constants, with a focus on the QSNET project. The authors describe the goals and expected performance of QSNET, and highlight its potential to discover new physics and shed light on the nature of dark matter and dark energy.
EPJ QUANTUM TECHNOLOGY
(2022)
Article
Physics, Multidisciplinary
C. J. Ho, J. Lim, B. E. Sauer, M. R. Tarbutt
Summary: Theories extending the Standard Model introduce new interactions that violate CP symmetry. By measuring the nuclear magnetic quadrupole moment, CP-violating effects within a nucleus can be probed. The use of heavy polar molecules with quadrupole deformation enhances the sensitivity of such measurements. The energy levels of molecules are shifted by the magnetic quadrupole moment, and a generic scheme for preparing superposition states is developed. This method can reduce uncertainties on CP-violating parameters.
FRONTIERS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Bijit Mukherjee, Matthew D. Frye, C. Ruth Le Sueur, Michael R. Tarbutt, Jeremy M. Hutson
Summary: We investigate the effects of strong static electric fields on collisions between ultracold CaF molecules. The presence of these fields creates long-range barriers in the interaction potential, preventing the molecules from undergoing inelastic and other loss processes in the short-range region. By utilizing a Van Vleck transformation, we develop an efficient method to incorporate energetically well-separated rotor functions in our calculations. Our results demonstrate that shielding is highly effective for CaF molecules, reducing the rate of two-body loss processes by a factor of 107 or more at a field strength of 23 kV/cm. While electron and nuclear spins cause additional loss in limited field ranges, their impact is negligible elsewhere. These findings lay the groundwork for evaporative cooling of CaF towards quantum degeneracy.
PHYSICAL REVIEW RESEARCH
(2023)
Article
Quantum Science & Technology
Chi Zhang, M. R. Tarbutt
Summary: An array of polar molecules interacting with Rydberg atoms is a promising hybrid system for scalable quantum computation, with high fidelity and little sensitivity to particle motional states. This system allows for two-qubit gates in a static array, rapid qubit initialization, and efficient readout without driving molecular transitions or moving the molecules.
Article
Quantum Science & Technology
P. Scholl, H. J. Williams, G. Bornet, F. Wallner, D. Barredo, L. Henriet, A. Signoles, C. Hainaut, T. Franz, S. Geier, A. Tebben, A. Salzinger, G. Zuern, T. Lahaye, M. Weidemuller, A. Browaeys
Summary: This study utilizes the resonant dipole-dipole interaction between Rydberg atoms and a periodic microwave field to engineer XXZ spin Hamiltonians with tunable anisotropies. The experimental results demonstrate the potential applications of this technique in quantum simulation, quantum information processing, and quantum sensing.
