Results 41 to 50 of about 7,140 (198)

Progress toward ultracold chemistry: ultracold atomic and photonic collisions

Journal of Physics: Conference Series, 2014
The dynamics of ultracold quantum gases composed of atoms or molecules with extremely low translational energy Et/kB
Jesús Pérez-Ríos, Maxence Lepers, Romain Vexiau, Nadia Bouloufa-Maafa, Olivier Dulieu   +4 more
openaire   +1 more source

Single atom in a superoscillatory optical trap

Communications Physics, 2023
Optical tweezers have become essential tools to manipulate atoms or molecules at a single particle level. However, using standard diffraction-limited optical systems, the transverse size of the trap is lower bounded by the optical wavelength, limiting ...
Hamim Mahmud Rivy, Syed A. Aljunid, Emmanuel Lassalle, Nikolay I. Zheludev, David Wilkowski   +4 more
doaj   +1 more source

Control of Ultracold Photodissociation with Magnetic Fields

, 2017
Photodissociation of a molecule produces a spatial distribution of photofragments determined by the molecular structure and the characteristics of the dissociating light.
Kondov, S. S., Lee, C. -H., Majewska, I., McDonald, M., McGuyer, B. H., Moszynski, R., Zelevinsky, T.   +6 more
core   +1 more source

Magneto-optical trapping of diatomic molecules

, 2012
The development of the magneto-optical trap revolutionized the fields of atomic and quantum physics by providing a simple method for the rapid production of ultracold, trapped atoms.
Collopy, Alejandra L., Hummon, Matthew T., Stuhl, Benjamin K., Xia, Yong, Ye, Jun, Yeo, Mark   +5 more
core   +1 more source

Ultracold controlled chemistry

Physics, 2010
Bound by the Coulomb interaction forces alone, atomic nuclei and electrons combine to form an incredible variety of molecular systems. When molecules react, they undergo chemical transformations leading to rearrangement of atoms within molecules or transfer of atoms between molecules.
openaire   +2 more sources

Reweighting Scheme for the Calculation of Grand‐Canonical Expectation Values in Quantum Monte Carlo Simulations With a Fermion Sign Problem

Contributions to Plasma Physics, EarlyView.
ABSTRACT Ab initio path integral Monte Carlo (PIMC) simulations constitute the gold standard for the estimation of a broad range of equilibrium properties of a host of interacting quantum many‐body systems spanning a broad range of conditions from ultracold atoms to warm dense quantum plasmas.
Paul Hamann, Jan Vorberger, Tobias Dornheim   +2 more
wiley   +1 more source

Geometric phase effects in the ultracold D + HD D + HD and D + HD H + D2 reactions

New Journal of Physics, 2016
The results of accurate quantum reactive scattering calculations for the D + HD( v  = 4, j  = 0) $\to $ D + HD( $v^{\prime} $ , $j^{\prime} $ ), D + HD( v  = 4, j  = 0) $\to $ H + D _2 ( $v^{\prime} $ , $j^{\prime} $ ) and H + D _2 ( v  = 4, j  = 0) $\to
B K Kendrick, Jisha Hazra, N Balakrishnan   +2 more
doaj   +1 more source

Cold interactions and chemical reactions of linear polyatomic anions with alkali-metal and alkaline-earth-metal atoms

, 2017
We consider collisional studies of linear polyatomic ions immersed in ultracold atomic gases and investigate the intermolecular interactions and chemical reactions of several molecular anions ($\mathrm{OH}^-$, $\mathrm{CN}^-$, $\mathrm{NCO}^-$, $\mathrm ...
Tomza, Michał
core   +1 more source

Magnetically Controlled Exchange Process in an Ultracold Atom-Dimer Mixture [PDF]

, 2009
We report on the observation of an elementary exchange process in an optically trapped ultracold sample of atoms and Feshbach molecules. We can magnetically control the energetic nature of the process and tune it from endoergic to exoergic, enabling the ...
Berninger, M., D'Incao, J. P., Esry, B. D., Ferlaino, F., Grimm, R., Knoop, S., Mark, M., Nägerl, H. -C.   +7 more
core   +2 more sources

Chemical oscillation in ultracold chemistry

Europhysics Letters
Abstract We demonstrate the occurrence of oscillatory reactions in the ultra-cold chemistry of atom-molecular Bose-Einstein condensate. Nonlinear oscillations in the mean-field dynamics occur for a specific range of elliptic modulus, giving rise to both in- and out-phase modulations in the atom-molecule population density.
Modak, Subhrajit, Das, Priyam, Mishra, Challenger, Panigrahi, Prasanta K.   +3 more
openaire   +2 more sources