We create weakly bound Li2 molecules from a degenerate two component Fermi gas by sweeping a magnetic field across a Feshbach resonance. The atom-molecule transfer efficiency can reach 85% and is studied as a function of magnetic field and initial temperature. The bosonic molecules remain trapped for 0.5 s and their temperature is within a factor of 2 from the Bose-Einstein condensation temperature. A thermodynamical model reproduces qualitatively the experimental findings.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.91.240401 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effect of In Vitro Gastrointestinal Digestion on the Polyphenol Bioaccessibility and Bioavailability of Processed Sorghum ( L. Moench).
Molecules
November 2024
School of Dentistry and Medical Sciences, Charles Sturt University, Wagga Wagga, NSW 2650, Australia.
Sorghum is a significant source of polyphenols, whose content, antioxidant properties and bioaccessibility may be modulated by digestion. Studies have reported sorghum polyphenol changes after simulated digestion. However, the effects of simulated digestion on processed, pigmented sorghum are unknown.
View Article and Find Full Text PDFHirshfeld Atom Refinement (HAR) and Complementary Bonding Analysis of Lithium m-Terphenylhydridoborates Containing B-H⋅⋅⋅Li Linkages.
Chemistry
December 2024
Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359, Bremen, Germany.
The synthesis and characterization of the lithium m-terphenylhydridoborates [Li(2,6-MesCH)BH] (1), Li(2,6-MesCH)BH (2) and Li(OEt)(2,6-MesCH)BH (3) are reported. Hirshfeld Atom Refinement (HAR) of the experimentally obtained molecular structures by single-crystal X-ray crystallography allowed the determination of the exact positions of the hydrogen atoms. The bond situations of the various B-H⋅⋅⋅Li linkages were investigated by a complementary bonding analysis using various methods including atoms in molecules (AIM), electron localizability indicator (ELI-D), non-covalent interaction (NCI) index and the compliance matrix.
View Article and Find Full Text PDFCrystal structure of dilithium biphenyl-4,4'-di-sulfonate dihydrate.
Acta Crystallogr E Crystallogr Commun
January 2024
Nagakute, Aichi 480-1192, Japan.
The asymmetric unit of the title compound, μ-biphenyl-4,4'-di-sulfonato-bis-(aqua-lithium), [Li(CHOS)(HO)] or Li[Bph(SO)](HO), consists of an Li ion, half of the diphenyl-4,4'-di-sulfonate [Bph(SO )] ligand, and a water mol-ecule. The Li ion exhibits a four-coordinate tetra-hedral geometry with three oxygen atoms of the Bph(SO ) ligands and a water mol-ecule. The tetra-hedral LiO units, which are inter-connected by biphenyl moieties, form a layer structure parallel to (100).
View Article and Find Full Text PDFElectronic structure of Li and nature of the bonding in Li
J Comput Chem
March 2024
Department of Chemistry, University of Washington, Seattle, Washington, USA.
The current study of the small lithium molecules Li and Li focuses on the nature of the bonding in these molecules as well as their structures and energetics (bond energies, ionization energies, and electron affinities). Valence CASSCF (2s,2p) calculations incorporate nondynamical electron correlation in the calculations, while the corresponding multireference configuration interaction and coupled cluster calculations incorporate dynamical electron correlation. Treatment of nondynamical correlation is critical for properly describing the Li molecules as well as the Li anion with dynamical correlation, in general, only fine-tuning the predictions.
View Article and Find Full Text PDFStructure and function of SARS-CoV and SARS-CoV-2 main proteases and their inhibition: A comprehensive review.
Eur J Med Chem
November 2023
Department of Pharmacology and Chemical Biology, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX, 77030, USA; Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX, 77030, USA. Electronic address:
Severe acute respiratory syndrome-associated coronavirus (SARS-CoV) identified in 2003 infected ∼8000 people in 26 countries with 800 deaths, which was soon contained and eradicated by syndromic surveillance and enhanced quarantine. A closely related coronavirus SARS-CoV-2, the causative agent of COVID-19 identified in 2019, has been dramatically more contagious and catastrophic. It has infected and caused various flu-like symptoms of billions of people in >200 countries, including >6 million people died of or with the virus.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!