Simulations of Sisyphus cooling including multiple excited states (2008)
Svensson, F., Jonsell, S., Dion, C. M.
We extend the theory for laser cooling in a near-resonant optical lattice to include multiple excited hyperfine states. Simulations are performed treating the external degrees of freedom of the atom,...
The interaction of antihydrogen with simple atoms and molecules (2008)
Armour, EAG, Todd, AC, Jonsell, S, Liu, Y, Gregory, MR, Plummer, M
Low-energy scattering of antihydrogen by helium and molecular hydrogen (2008)
Armour, EAG, Todd, AC, Jonsell, S, Liu, Y, Gregory, MR, Plummer, M
AIP Conference Proceedings 1037
Characterisation of a three-dimensional Brownian motor in optical lattices (2007)
Sjolund, P., Petra, S. J. H., Dion, C. M., Hagman, H., Jonsell, S., Kastberg, A.
We present here a detailed study of the behaviour of a three dimensional Brownian motor based on cold atoms in a double optical lattice [P. Sjolund et al., Phys. Rev. Lett. 96, 190602 (2006)]. This...
Demonstration of a controllable three-dimensional Brownian motor in symmetric potentials (2006)
Sjolund, P., Petra, S.J.H., Dion, C.M., Jonsell, S., Nylen, M., Sanchez-Palencia, L., ...
We demonstrate a Brownian motor, based on cold atoms in optical lattices, where isotropic random fluctuations are rectified in order to induce controlled atomic motion in arbitrary directions. In...
Demonstration of a controllable three-dimensional Brownian motor in symmetric potentials (2006)
Sjolund, P., Petra, S.J.H., Dion, C.M., Jonsell, S., Nylen, M., Sanchez-Palencia, L., ...
We demonstrate a Brownian motor, based on cold atoms in optical lattices, where isotropic random fluctuations are rectified in order to induce controlled atomic motion in arbitrary directions. In...
Low-temperature antihydrogen-atom scattering (2005)
A simple method to include the strong force in atom-antiatom scattering is presented. It is based on the strong-force scatteringn length between the nucleon and antinucleon. Using this method elastic...
A nonadiabatic semi-classical method for dynamics of atoms in optical lattices (2005)
Jonsell, S., Dion, C. M., Nylén, M., Petra, S. J. H., Sjölund, P., Kastberg, A.
We develop a semi-classical method to simulate the motion of atoms in a dissipative optical lattice. Our method treats the internal states of the atom quantum mechanically, including all nonadiabatic...
Demonstration of a controllable three-dimensional Brownian motor in symmetric potentials (2005)
Sjolund, P., Petra, S.J.H., Dion, C.M., Jonsell, S., Nylen, M., Sanchez-Palencia, L., ...
We demonstrate a Brownian motor, based on cold atoms in optical lattices, where isotropic random fluctuations are rectified in order to induce controlled atomic motion in arbitrary directions. In...
Long-range interactions between two 2s excited hydrogen atoms (2002)
Jonsell,S., Saenz,Alejandro, Froelich,P., Forrey,R. C., Côté,R., Dalgarno,A.
The doubly excited 1Σg+ and 3Σu+ states of the H2 molecule converging to the H(n=2)+H(n'=2) limit have been calculated using explicitly correlated basis functions, giving accurate results out to a...
Long-range interactions between two 2s excited hydrogen atoms (2002)
Jonsell, S, Saenz, A, Froelich, P, Forrey, RC, Côte, Renaud; U0051201, Dalgarno, A
The doubly excited (1)Sigma(g)(+) and (3)Sigma(u)(+) states of the H-2 molecule converging to the H(n=2)+H(n(')=2) limit have been calculated using explicitly correlated basis functions, giving...
The few-body problem for trapped bosons with large scattering length (2002)
Jonsell, S., Heiselberg, H., Pethick, C. J.
We calculate energy levels of two and three bosons trapped in a harmonic oscillator potential with oscillator length $a_{\mathrm osc}$. The atoms are assumed to interact through a short-range...
Long-range interactions between two 2s excited hydrogen atoms (2002)
Jonsell, S., Saenz, Alejandro, Froelich, P., Forrey, R. C., Côté, R., Dalgarno, A.
The doubly excited 1Σg+ and 3Σu+ states of the H2 molecule converging to the H(n=2)+H(n'=2) limit have been calculated using explicitly correlated basis functions, giving accurate results out to a...
Collisions between metastable hydrogen atoms at thermal energies (2000)
Forrey, RC, Côte, Renaud; U0051201, Dalgarno, A, Jonsell, S, Saenz, A, Froelich, P
The complex interaction potentials arising in the approach of two metastable hydrogen 2s atoms are calculated and the cross sections for ionization, excitation transfer, and elastic scattering are...