Theoretical Studies of Collisional Processes in Cold and Ultracold Gases
Theoretical Studies of collisional processes and gases at ultracold and cold temperatures in research that is responsive to the experimental program. Scattering at low temperatures is sensitive to the interaction at large distances of the colliding species. We calculated the interactions at long-range of a pair of ytterbium atoms (P. Zhang and a. Dalgarno 2008) and between ground state hydrogen atoms and highly excited hydrogen atoms ( D. Vrinceanu and A. Dalgarno 2008). We studied the process of thermalization and clarified its meaning (P. Zhang et al. 2008), P. Zhang et al. 2009, Bovino et al. 2009). Several studies were completed of collisions at ultralow temperatures in the presence of electric and magnetic fields including their influence on chemical reactions (Tscherbul et al. 2008, Tscherbul 2008, Pavlovich et al. 2009).
Author(s)
A. Dalgarno
Related CUA Publications
W. Campbell, T. Tscherbul, H. Lu, E. Tsikata, R. V. Krems, and J. M. Doyle, Mechanism of spin depolarization of ³S molecules, Phys. Rev. Lett. 102, 013003 (2009). A. Ruiz, J. P. Palao, and E. J. Heller, Classical and quantum analysis of quasiresonance in grazing atom-surface collisions, Phys. Rev. A 79, 052901 (2009). S. Bovino, P. Zhang, V. Kharchenko, and A. Dalgarno, Trapping Hydrogen Atoms from a neon-Gas matrix: A Theoretical Simulation, J. Chem. Phys. 131, 054302 (2009). M. J. Jamieson and A. Dalgarno, A Study of Exchange Interactions in alkali and Molecular Ion Dimers with Application to Charge Transfer in Cold Cs, J. Phys. B. 42, 095203 (2009). P. Zhang, V. Kharchenko, M. J. Jamieson, and A. Dalgarno, Energy Relaxation and Collisions of Hydrogen and Deuterium Oxygen Atoms, accepted J. Geophys. Res., (2009). T. Tscherbul, Y. V. Suleimanov, V. Aquilanti, and R. V. Krems, Magnetic field modification of ultracold molecule-molecule collisions, New J. Phys. 11, 055021 (2009). T. Tscherbul, P. Zhang, H. R. Sadeghpour, and A. Dalgarno, Collision-Induced spin Exchange of alkali-Metal Atoms with ³He: An Ab Initio Study, Phys. Rev. A 79, 062707 (2009). W. Campbell, T. Tscherbul, H. Lu, E. Tsikata, R. V. Krems, and J. M. Doyle, Mechanism of Collisional Spin Relaxation in ³S Molecules, Phys. Rev. Lett. 102, 013003 (2009). T. V. Tscherbul, G. Barinovs, J. Klos, and R. V. Krems, Formation of Slow Molecules in Chemical Reactions in Crossed Molecular Beams, Phys. Rev. A 78, 02275 (2008). T. Tscherbul and R. V. Krems, Quantum Theory of Chemical Reactions in the Presence of Electromagnetic Fields, J. Chem. Phys. 129, 034112 (2008). T. Tscherbul, P. Zhang, H. R. Sadeghpour, A. Dalgarno, N. Brahms, Y. S. Au, and J. M. Doyle, Collision-induced spin depolarization of alkali-metal atoms in cold ³He gas, Phys. Rev. A 78, 060703(R) (2008). S. E. Maxwell, M. T. Hummon, Y. Wang, A. A. Buchachenko, R. V. Krems, and J. M. Doyle, Spin-orbit interaction and large inelastic rates in bismuth-helium collisions, Phys. Rev. A 78, 042706 (2008). E. Kuznetsova, P. Pellegrini, R. Côté, M. D. Lukin, and S. Yelin, Formation of Deeply Bound Molecules via chainwise adiabatic passage, Phys. Rev. A 78, 021402 (2008). A. Ruiz, J. P. Palao, and E. J. Heller, Quasiresonances in atom-surface collisions, Journal of Physics: Conference Series 99, 012018 (2008). E. Bodo, P. Zhang, and A. Dalgarno, Ultracold Ion-Atom Collisions: near Resonant Charge Exchange, New J. Phys. 10, 033024 (2008). A. Dalgarno, P. Zhang, V. Kharchenko, Y. Matsumi, T. Nakayama, and K. Takahashi, Approach to Thermal Equilibrium in Atomic Collisions, Phys. Rev. Lett. 100, 103001 (2008). S. V. Nguyen, R. deCarvalho, and J. M. Doyle, Analysis of cold 52 Cr elastic and inelastic collision rates using evaporative cooling, Phys. Rev. A 75, 062706 (2007). G. Baym, C. J. Pethick, Z. Yu, and M. W. Zwierlein, Coherence and Clock Shifts in Ultracold Fermi Gases with Resonant Interactions, Phys. Rev. Lett. 99, 190407 (2007). K. E. Aidala, R. E. Parrott, T. Kramer, E. J. Heller, R. M. Westervelt, M. P. Hanson, and A. C. Gossard, Imaging Magnetic Focusing of Coherent Electron Waves, Nature Physics 3, 464-468 (2007). J. Y. Vaishnav, J. D. Walls, M. Apratim, and E. J. Heller, Gratings: Guiding Waves with Atom Walls, Phys. Rev. A 6, 13620 (2007). S. V. Nguyen, R. deCarvalho, and J. M. Doyle, Analysis of cold 52 Cr elastic and inelastic collision-rate determination using evaporative cooling analysis, Phys. Rev. A 75, 062706 (2007). A. Ruiz and E. J. Heller, Quasiresonance, Mol. Phys. 104, 127-145 (2006). E. J. Heller, Guided Gaussian Wave packets, Accounts of Chemical Research 39, 127 (2006).
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