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Ultracold hydrogen atoms: a versatile coolant to produce ultracold molecules (2013)
Journal Article
González-Martínez, M. L., & Hutson, J. M. (2013). Ultracold hydrogen atoms: a versatile coolant to produce ultracold molecules. Physical Review Letters, 111(20), Article 203004. https://doi.org/10.1103/physrevlett.111.203004

We show theoretically that ultracold hydrogen atoms have very favorable properties for sympathetic cooling of molecules to microkelvin temperatures. We calculate the potential energy surfaces for spin-polarized interactions of H atoms with the protot... Read More about Ultracold hydrogen atoms: a versatile coolant to produce ultracold molecules.

Magnetically tunable Feshbach resonances in Li plus Yb 3PJ (2013)
Journal Article
González-Martínez, M., & Hutson, J. (2013). Magnetically tunable Feshbach resonances in Li plus Yb 3PJ. Physical Review A, 88(2), Article 020701. https://doi.org/10.1103/physreva.88.020701

We have investigated magnetically tunable Feshbach resonances arising from the interaction of Li(2S) with metastable Yb(3P2) and(3P0). ForYb(3P2), all the resonance features are strongly suppressed by inelastic collisions that produce Yb in its lower... Read More about Magnetically tunable Feshbach resonances in Li plus Yb 3PJ.

Prospects of forming ultracold molecules in double-Sigma states by magnetoassociation of alkali-metal atoms with Yb (2013)
Journal Article
Brue, D. A., & Hutson, J. M. (2013). Prospects of forming ultracold molecules in double-Sigma states by magnetoassociation of alkali-metal atoms with Yb. Physical Review A, 87(5), Article 052709. https://doi.org/10.1103/physreva.87.052709

We explore the feasibility of producing ultracold diatomic molecules with nonzero electric and magnetic dipole moments by magnetically associating two atoms, one with zero electron spin and one with nonzero spin. Feshbach resonances arise through the... Read More about Prospects of forming ultracold molecules in double-Sigma states by magnetoassociation of alkali-metal atoms with Yb.

Feshbach resonances in ultracold 85Rb (2013)
Journal Article
Blackley, C. L., Le Sueur, C. R., Hutson, J. M., McCarron, D. J., Köppinger, M. P., Cho, H.-W., Jenkin, D. L., & Cornish, S. L. (2013). Feshbach resonances in ultracold 85Rb. Physical Review A - Atomic, Molecular, and Optical Physics, 87(3), https://doi.org/10.1103/physreva.87.033611

We present 17 experimentally confirmed Feshbach resonances in optically trapped 85Rb. Seven of the resonances are in the ground-state channel (f,mf)=(2,+2)+(2,+2) and nine are in the excited-state channel (2,−2)+(2,−2). We find a wide resonance at hi... Read More about Feshbach resonances in ultracold 85Rb.

Feshbach spectroscopy of an ultracold mixture of Rb-85 and Cs-133 (2013)
Journal Article
Cho, H. W., McCarron, D. J., Koppinger, M. P., Jenkin, D. L., Butler, K. L., Julienne, P. S., Blackley, C. L., Le Sueur, C. R., Hutson, J. M., & Cornish, S. L. (2013). Feshbach spectroscopy of an ultracold mixture of Rb-85 and Cs-133. Physical Review A - Atomic, Molecular, and Optical Physics, 87(1), Article 010703(R). https://doi.org/10.1103/physreva.87.010703

We report the observation of interspecies Feshbach resonances in an optically trapped mixture of 85Rb and 133Cs. We measure nine resonances in the lowest spin channel for a magnetic field range from 0 to 700 G and show that they are in good agreement... Read More about Feshbach spectroscopy of an ultracold mixture of Rb-85 and Cs-133.

Feshbach resonances, weakly bound molecular states, and coupled-channel potentials for cesium at high magnetic fields (2013)
Journal Article
Berninger, M., Zenesini, A., Huang, B., Harm, W., Naegerl, H., Ferlaino, F., …Hutson, J. M. (2013). Feshbach resonances, weakly bound molecular states, and coupled-channel potentials for cesium at high magnetic fields. Physical Review A, 87(3), Article 032517. https://doi.org/10.1103/physreva.87.032517

We explore the scattering properties of ultracold ground-state Cs atoms at magnetic fields between 450 G (45 mT) and 1000 G. We identify 17 previously unreported Feshbach resonances, including two very broad ones near 549 and 787 G. We measure the bi... Read More about Feshbach resonances, weakly bound molecular states, and coupled-channel potentials for cesium at high magnetic fields.

Multichannel quantum defect theory for cold molecular collisions with a strongly anisotropic potential energy surface (2013)
Journal Article
Croft, J. F. E., & Hutson, J. M. (2013). Multichannel quantum defect theory for cold molecular collisions with a strongly anisotropic potential energy surface. Physical Review A, 87(3), Article 032710. https://doi.org/10.1103/physreva.87.032710

We show that multichannel quantum defect theory (MQDT) can be applied successfully as an efficient computational method for cold molecular collisions in Li+NH, which has a deep and strongly anisotropic interaction potential. In this strongly coupled... Read More about Multichannel quantum defect theory for cold molecular collisions with a strongly anisotropic potential energy surface.

Precise characterization of Li-6 Feshbach resonances using trap-sideband-resolved RF spectroscopy of weakly bound molecules (2013)
Journal Article
Zuern, G., Lompe, T., Wenz, A. N., Jochim, S., Julienne, P. S., & Hutson, J. M. (2013). Precise characterization of Li-6 Feshbach resonances using trap-sideband-resolved RF spectroscopy of weakly bound molecules. Physical Review Letters, 110(13), Article 135301. https://doi.org/10.1103/physrevlett.110.135301

We perform radio-frequency dissociation spectroscopy of weakly bound 6Li2 Feshbach molecules using low-density samples of about 30 molecules in an optical dipole trap. Combined with a high magnetic field stability, this allows us to resolve the discr... Read More about Precise characterization of Li-6 Feshbach resonances using trap-sideband-resolved RF spectroscopy of weakly bound molecules.

Magnetically Tunable Feshbach Resonances in Ultracold Li-Yb Mixtures (2012)
Journal Article
Brue, D. A., & Hutson, J. M. (2012). Magnetically Tunable Feshbach Resonances in Ultracold Li-Yb Mixtures. Physical Review Letters, 108(4), Article 043201. https://doi.org/10.1103/physrevlett.108.043201

We investigate the possibility of forming Li+Yb ultracold molecules by magnetoassociation in mixtures of ultracold atoms. We find that magnetically tunable Feshbach resonances exist, but are extremely narrow for even-mass ytterbium isotopes, which al... Read More about Magnetically Tunable Feshbach Resonances in Ultracold Li-Yb Mixtures.

Optimized multichannel quantum defect theory for cold molecular collisions (2012)
Journal Article
Croft, J. F., Hutson, J. M., & Julienne, P. S. (2012). Optimized multichannel quantum defect theory for cold molecular collisions. Physical Review A, 86(2), Article 022711. https://doi.org/10.1103/physreva.86.022711

Multichannel quantum defect theory (MQDT) can provide an efficient alternative to full coupled-channel calculations for low-energy molecular collisions. However, the efficiency relies on interpolation of the Y matrix that encapsulates the short-range... Read More about Optimized multichannel quantum defect theory for cold molecular collisions.

Towards the production of ultracold ground-state RbCs molecules: Feshbach resonances, weakly bound states, and the coupled-channel model (2012)
Journal Article
Takekoshi, T., Debatin, M., Rameshan, R., Ferlaino, F., Grimm, R., Nägerl, H.-C., Le Sueur, C. R., Hutson, J. M., Julienne, P. S., Kotochigova, S., & Tiemann, E. (2012). Towards the production of ultracold ground-state RbCs molecules: Feshbach resonances, weakly bound states, and the coupled-channel model. Physical Review A - Atomic, Molecular, and Optical Physics, 85(3), Article 032506. https://doi.org/10.1103/physreva.85.032506

We have studied interspecies scattering in an ultracold mixture of 87Rb and 133Cs atoms, both in their lowest-energy spin states. The three-body loss signatures of 30 incoming s- and p-wave magnetic Feshbach resonances over the range 0 to 667 G have... Read More about Towards the production of ultracold ground-state RbCs molecules: Feshbach resonances, weakly bound states, and the coupled-channel model.

Cold collisions of an open-shell S-state atom with a (2)Pi molecule : N(S-4) colliding with OH in a magnetic field (2011)
Journal Article
Skomorowski, W., Gonzalez-Martinez, M. L., Moszynski, R., & Hutson, J. M. (2011). Cold collisions of an open-shell S-state atom with a (2)Pi molecule : N(S-4) colliding with OH in a magnetic field. Physical Chemistry Chemical Physics, 13(42), 19077-19088. https://doi.org/10.1039/c1cp21200a

We present quantum-theoretical studies of collisions between an open-shell S-state atom and a 2Π-state molecule in the presence of a magnetic field. We analyze the collisional Hamiltonian and discuss possible mechanisms for inelastic collisions in su... Read More about Cold collisions of an open-shell S-state atom with a (2)Pi molecule : N(S-4) colliding with OH in a magnetic field.

The prospects of sympathetic cooling of NH molecules with Li atoms (2011)
Journal Article
Wallis, A. O. G., Longdon, E. J. J., Zuchowski, P. S., & Hutson, J. M. (2011). The prospects of sympathetic cooling of NH molecules with Li atoms. The European Physical Journal D, 65(1-2), 151-160. https://doi.org/10.1140/epjd/e2011-20025-4

We calculate the quartet potential energy surface for Li+NH and use it to calculate elastic and spin-relaxation cross sections for collisions in magnetically trappable spin-stretched states. The potential is strongly anisotropic but spin-relaxation c... Read More about The prospects of sympathetic cooling of NH molecules with Li atoms.

Prospects for sympathetic cooling of molecules in electrostatic, ac and microwave traps (2011)
Journal Article
Tokunaga, S. K., Skomorowski, W., Zuchowski, P. S., Moszynski, R., Hutson, J. M., Hinds, E. A., & Tarbutt, M. R. (2011). Prospects for sympathetic cooling of molecules in electrostatic, ac and microwave traps. The European Physical Journal D, 65(1-2), 141-149. https://doi.org/10.1140/epjd/e2011-10719-x

We consider how trapped molecules can be sympathetically cooled by ultracold atoms. As a prototypical system, we study LiH molecules co-trapped with ultracold Li atoms. We calculate the elastic and inelastic collision cross sections of 7LiH + 7Li wit... Read More about Prospects for sympathetic cooling of molecules in electrostatic, ac and microwave traps.

Cold and ultracold NH-NH collisions : the field-free case (2011)
Journal Article
Janssen, L. M., Zuchowski, P. S., van der Avoird, A., Hutson, J. M., & Groenenboom, G. C. (2011). Cold and ultracold NH-NH collisions : the field-free case. The Journal of Chemical Physics, 134(12), Article 124309. https://doi.org/10.1063/1.3570596

We present elastic and inelastic spin-changing cross sections for cold and ultracold NH(X 3Σ−) + NH(X 3Σ−) collisions, obtained from full quantum scattering calculations on an accurate ab initio quintet potential-energy surface. Although we consider... Read More about Cold and ultracold NH-NH collisions : the field-free case.

Cold and ultracold NH-NH collisions in magnetic fields (2011)
Journal Article
Janssen, L. M. C., Zuchowski, P. S., van der Avoird, A., Groenenboom, G. C., & Hutson, J. M. (2011). Cold and ultracold NH-NH collisions in magnetic fields. Physical Review A, 83(2), Article 022713. https://doi.org/10.1103/physreva.83.022713

Elastic and spin-changing inelastic collision cross sections are presented for cold and ultracold magnetically trapped NH. The cross sections are obtained from coupled-channel scattering calculations as a function of energy and magnetic field. We spe... Read More about Cold and ultracold NH-NH collisions in magnetic fields.

Optically induced conical intersections in traps for ultracold atoms and molecules (2011)
Journal Article
Wallis, A. O. G., & Hutson, J. M. (2011). Optically induced conical intersections in traps for ultracold atoms and molecules. Physical Review A, 84(5), Article 051402. https://doi.org/10.1103/physreva.84.051402

We show that conical intersections can be created in laboratory coordinates by dressing a parabolic trap for ultracold atoms or molecules with a combination of optical and static magnetic fields. The resulting ring trap can support single-particle st... Read More about Optically induced conical intersections in traps for ultracold atoms and molecules.

Interaction between LiH molecule and Li atom from state-of-the-art electronic structure calculations (2011)
Journal Article
Skomorowski, W., Pawlowski, F., Korona, T., Moszynski, R., Zuchowski, P. S., & Hutson, J. M. (2011). Interaction between LiH molecule and Li atom from state-of-the-art electronic structure calculations. The Journal of Chemical Physics, 134(11), Article 114109. https://doi.org/10.1063/1.3563613

State-of-the-art ab initio techniques have been applied to compute the potential energy surface for the lithium atom interacting with the lithium hydride molecule in the Born–Oppenheimer approximation. The interaction potential was obtained using a c... Read More about Interaction between LiH molecule and Li atom from state-of-the-art electronic structure calculations.

Cold collisions of N (S-4) atoms and NH ((3)Sigma) molecules in magnetic fields (2011)
Journal Article
Zuchowski, P. S., & Hutson, J. M. (2011). Cold collisions of N (S-4) atoms and NH ((3)Sigma) molecules in magnetic fields. Physical Chemistry Chemical Physics, 13(9), 3669-3680. https://doi.org/10.1039/c0cp01447h

We calculate the interaction potential between N atoms and NH molecules and use it to investigate cold and ultracold collisions important for sympathetic cooling. The ratio of elastic to inelastic cross sections is large over a wide range of collisio... Read More about Cold collisions of N (S-4) atoms and NH ((3)Sigma) molecules in magnetic fields.