Article
Optics
Felipe Isaule, Robert Bennett, Jorg B. Gotte
Summary: This study reveals the existence of polarizing quantum phases for the enantiomers of cold, interacting chiral molecules in an optical helicity lattice, where the discriminatory force exerted by alternating helicity separates molecules with different handedness.
Article
Physics, Multidisciplinary
JuHyeon Lee, Johannes Bischoff, A. O. Hernandez-Castillo, Boris Sartakov, Gerard Meijer, Sandra Eibenberger-Arias
Summary: In this study, we quantitatively investigated enantiomer-specific state transfer using a pulsed supersonic molecular beam. By using optical pumping and microwave pulses, we were able to improve enantiomer enrichment and create a molecular beam with an enantiomer-pure rotational level, which holds great potential for future spectroscopic and scattering studies.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Yong Zhang, Qian-Yu Zhang, Wen-Li Bai, Zhi-Yuan Ao, Wen-Cui Peng, Sheng-Guo He, Xin Tong
Summary: We have developed a method for generating ultracold HD+ molecular ions in a rotational ground state using resonance-enhanced threshold photoionization and sympathetic cooling. We investigated the impact of the electric field in the ion trap and blackbody radiation on the population distribution of the rotational states of the HD+ ions. The population of the rotational ground state decreased from 0.93(12) to 0.77(8) after 5 seconds due to the coupling with blackbody radiation. This method has significant applications in precision rovibrational spectroscopy, state-controlled cold chemical reaction, and quantum logic spectroscopy.
Review
Multidisciplinary Sciences
Timothy P. Softley
Summary: Over the past 25 years, various experimental techniques have been developed to create molecular gas samples at temperatures close to Absolute Zero, ranging from tens of Kelvin (cold) to tens of nanoKelvin (ultracold). These environments enable novel experiments with high control over the properties of nearly stationary molecules, including control over single trapped molecules. Recent advances in this field since 2020 are highlighted in this article, focusing on the ability to produce and manipulate molecules, understand their properties, and develop new applications of these technologies. Applications include observing quantum effects in chemical reactivity, studying chemistry in cold astrophysical media, creating exotic phases of matter, utilizing trapped molecules in quantum computation and simulation systems, and using high-precision spectroscopic measurements to explore fundamental physics beyond the standard model of particle physics.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Multidisciplinary Sciences
William Michael Snow, Chris Haddock, Ben Heacock
Summary: Slow neutrons possess advantageous properties for investigating exotic interactions, including potential components of dark matter.
Article
Physics, Multidisciplinary
B. Zjawin, M. Bober, R. Ciurylo, D. Lisak, M. Zawada, P. Wcislo
Summary: Experiments searching for variations in the fine-structure constant α are typically based on spectroscopy of microscopic bound systems or resonances in optical cavities. This article proposes a new method for controlling sensitivity factor of macroscopic physical systems, with specific concepts of optical cavities with tunable sensitivity to α. The proposed systems show qualitatively different properties from previous studies, paving the way for new approaches to searching for variations in fundamental physics constants.
Article
Physics, Nuclear
Yicheng Feng, Jie Zhao, Hanlin Li, Hao-jie Xu, Fuqiang Wang
Summary: This paper investigates the effects of two-and three-particle nonflow correlations on the extracted chiral magnetic effect signal fraction, and finds that the nonflow effects amount to approximately (4 +/- 5)% and (-5 +/- 3)% in 20-50% centrality Au+Au collisions.
Article
Multidisciplinary Sciences
Yihao Xu, Lin Li, Heonyeong Jeong, Seokwoo Kim, Inki Kim, Junsuk Rho, Yongmin Liu
Summary: In this work, we realize the unidirectional excitation and reflection of surface plasmon polaritons by designing the permittivity profile of non-Hermitian metagratings. The excitation or reflection ratios can be continuously tuned by altering the geometry of the metagrating. The control and robust performance are attributed to the phase transition near the exceptional point, which is confirmed by theoretical calculations, numerical simulations, and experimental characterization.
Review
Physics, Multidisciplinary
K. Trachenko
Summary: This article discusses the new insights into fundamental physical constants and their tuning provided by condensed matter and liquid physics. It explores the relationship between bio-friendly viscosity and diffusion range and the range of fundamental constants, and also suggests questions that can be addressed by life sciences.
REPORTS ON PROGRESS IN PHYSICS
(2023)
Article
Astronomy & Astrophysics
Breanna Collier, Kristopher Krueger, Isaac Miller, Jianbao Zhao, Brant E. Billinghurst, Paul L. Raston
Summary: This passage reports an analysis of the high-resolution far-infrared spectrum of glycolaldehyde (GA), focusing on its three fundamental vibrational bands. By assigning transitions and refining rotational constants, the study provides useful data for research on vibrationally excited GA. Accurate determination of band origins allows for refinement of the vibrational partition function and column density for a given excitation temperature.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2021)
Article
Chemistry, Physical
Brian J. Esselman, Maria A. Zdanovskaia, Andrew N. Owen, John F. Stanton, R. Claude Woods, Robert J. McMahon
Summary: The pure rotational spectrum of thiazole was studied using a combination of experimental measurements and theoretical calculations to determine accurate rotational constants and equilibrium structures for various isotopologues. The discrepancies between the experimental and theoretical structures were discussed, showing that not all theoretical parameters fell within the statistical limits of the experimental results.
JOURNAL OF CHEMICAL PHYSICS
(2021)
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
Chemistry, Physical
Peter Schwerdtfeger
Summary: This study investigates the dependence of nuclear quadrupole coupling constants CNQC(alpha) on the fine-structure constant alpha for various diatomic gold molecules AuX (X = H, F, Cl, Br, and I) at the density functional level of theory. The results show that the electric field gradient at gold is sensitive to the density functional applied, but the derivative with respect to alpha is less sensitive. The study also estimates the upper limit for the alpha variation in time, dCNQC/dt, at 10-9 Hz/year, which exceeds the limit of high-precision spectroscopy.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Quantum Science & Technology
Matthias Raudonis, Albert Roura, Matthias Meister, Christoph Lotz, Ludger Overmeyer, Sven Herrmann, Andreas Gierse, Claus Laemmerzahl, Nicholas P. Bigelow, Maike Lachmann, Baptist Piest, Naceur Gaaloul, Ernst M. Rasel, Christian Schubert, Waldemar Herr, Christian Deppner, Holger Ahlers, Wolfgang Ertmer, Jason R. Williams, Nathan Lundblad, Lisa Woerner
Summary: This article discusses the significance and application of ground-based microgravity facilities in cold atom research. These facilities provide adjustable free fall times, high stability, and strong payload capabilities, meeting the requirements of cold atom experiments. Additionally, they allow for flexibility in modifying and adjusting experiments.
QUANTUM SCIENCE AND TECHNOLOGY
(2023)
Article
Quantum Science & Technology
David Hanneke, Boran Kuzhan, Annika Lunstad
Summary: Some new physics models suggest changes in fundamental constants, with a simple model linking molecular vibrations to the proton-to-electron mass ratio. Many vibrational transitions occur at optical frequencies, making them potential candidates for highly accurate optical clocks. Laboratory procedures and experiments on molecules are currently being developed, with projected uncertainties making them strong contenders in future searches for time-variation of mu.
QUANTUM SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Multidisciplinary
Camilla De Rossi, Romain Dubessy, Karina Merloti, Mathieu de Goer de Herve, Thomas Badr, Aurelien Perrin, Laurent Longchambon, Helene Perrin
NEW JOURNAL OF PHYSICS
(2016)
Article
Optics
D. Ben Ali, T. Badr, T. Brezillon, R. Dubessy, H. Perrin, A. Perrin
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2017)
Article
Optics
Thomas Badr, Dany Ben Ali, Joseph Seaward, Yanliang Guo, Fabrice Wiotte, Romain Dubessy, Helene Perrin, Aurelien Perrin
APPLIED PHYSICS B-LASERS AND OPTICS
(2019)
Article
Physics, Multidisciplinary
Juan Polo, Romain Dubessy, Paolo Pedri, Helene Perrin, Anna Minguzzi
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Multidisciplinary
Yanliang Guo, Romain Dubessy, Mathieu de Goer de Herve, Avinash Kumar, Thomas Badr, Aurelien Perrin, Laurent Longchambon, Helene Perrin
PHYSICAL REVIEW LETTERS
(2020)
Article
Optics
Mathieu de Goer de Herve, Yanliang Guo, Camilla De Rossi, Avinash Kumar, Thomas Badr, Romain Dubessy, Laurent Longchambon, Helene Perrin
Summary: The study discusses the confinement of a Bose-Einstein condensate in an annular trap with adjustable parameters, achieved through a combination of magnetic, optical, and radio-frequency fields. Different radii annular traps are presented, with persistent flows prepared using a rotating laser stirrer and global quadrupole deformation. This setup is well-suited for investigating superfluid dynamics.
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
(2021)
Article
Physics, Multidisciplinary
Yanliang Guo, Emmanuel Mercado Gutierrez, David Rey, Thomas Badr, Aurelien Perrin, Laurent Longchambon, Vanderlei Salvador Bagnato, Helene Perrin, Romain Dubessy
Summary: In this study, we observed the controlled expansion of a two-dimensional quantum gas confined onto a curved shell-shaped surface and discovered the influence of a gravity compensation mechanism on the system. The experimental results were compared with a classical model, and the importance of a hidden dimension in inducing topological changes in low-dimensional systems was demonstrated.
NEW JOURNAL OF PHYSICS
(2022)
Article
Physics, Applied
David Rey, Simon Thomas, Rishabh Sharma, Thomas Badr, Laurent Longchambon, Romain Dubessy, Helene Perrin
Summary: In this study, efficient loading of a degenerate Bose gas into a shell-shaped trap was demonstrated by direct radiofrequency (rf) evaporation in a hybrid trap. The shell trap, relying on adiabatic potentials for atoms in an inhomogeneous magnetic field dressed by an rf field, enabled the transfer of the cold sample with limited excitation of the center-of-mass motion.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Multidisciplinary
Ignacio Reyes-Ayala, Marcos Miotti, Michal Hemmerling, Romain Dubessy, Helene Perrin, Victor Romero-Rochin, Vanderlei Salvador Bagnato
Summary: This study analyzes the Carnot cycles of harmonically confined ultracold Rb-87 fluids near and across Bose-Einstein condensation (BEC), and determines the corresponding equation of state through experimental measurements. The focus is on the efficiency of the Carnot engine during the cycle at temperatures above or below the critical temperature, and when BEC is crossed. The results show perfect agreement with the theoretical prediction (1-T-L/T-H), with T-H and T-L representing the temperatures of the hot and cold heat exchange reservoirs. Other cycles are also considered for comparison.
Article
Optics
Abhik Kumar Saha, Romain Dubessy
Summary: In a one-dimensional Bose-Josephson junction, different initial population imbalances and barrier heights lead to different dynamical effects. A quench protocol that can be readily implemented in experiments can trigger self-trapping resonances.
Article
Physics, Multidisciplinary
Romain Dubessy, Juan Polo, Helene Perrin, Anna Minguzzi, Maxim Olshanii
Summary: The protocol presented in the study allows for the creation of moving, robust dispersive shock waves in interacting one-dimensional Bose fluids, which are demonstrated to be oscillatory and resistant to thermal fluctuations. These shock waves are shown to be universal and controllable across a spectrum of interaction strengths, and the proposed dynamics extend the dispersive-shock-wave paradigm to the many-body regime, making them accessible for ultracold atom experiments.
PHYSICAL REVIEW RESEARCH
(2021)
Proceedings Paper
Physics, Applied
Romain Dubessy, Camilla De Rossi, Mathieu de Goer De Herve, Thomas Badr, Aurelien Perrin, Laurent Longchambon, Helene Perrin
FOURTH INTERNATIONAL CONFERENCE ON QUANTUM TECHNOLOGIES (ICQT-2017)
(2018)
Article
Optics
Avinash Kumar, Romain Dubessy, Thomas Badr, Camilla De Rossi, Mathieu de Goer de Herve, Laurent Longchambon, Helene Perrin
Proceedings Paper
Physics, Applied
Camilla De Rossi, Romain Dubessy, Karina Merloti, Mathieu de Goer de Herve, Thomas Badr, Aurelien Perrin, Laurent Longchambon, Helene Perrin
VII INTERNATIONAL SYMPOSIUM AND YOUNG SCIENTISTS SCHOOL MODERN PROBLEMS OF LASER PHYSICS
(2017)