124 citations · 1.6k across the 66 of their papers we have counts for
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Jahn-Teller induced Berry phase in spin-orbit coupled Bose-Einstein condensates
Jonas Larson, Erik Sjoqvist
We demonstrate that Berry phases may greatly affect the dynamics of spin-orbit coupled Bose-Einstein condensates. The effective model Hamiltonian under consideration is shown to be…
Coupling internal atomic states in a two-component Bose-Einstein condensate via an optical lattice: Extended Mott-superfluid transitions
Jonas Larson, Jani-Petri Martikainen
An ultracold gas of coupled two-component atoms in an optical field is studied. Due to the internal two-level structure of the atoms, three competing energy terms exist; atomic kin…
Multiband bosons in optical lattices
J. Larson, A. Collin, J. -P. Martikainen
We study a gas of repulsively interacting bosons in an optical lattice and explore the physics beyond the lowest band Hubbard model. Utilizing a generalized Gutzwiller ansatz, we f…
Coupled two-component atomic gas in an optical lattice
Jonas Larson, Jani-Petri Martikainen
We present an ab initio study of the ground state of an ideal coupled two-component gas of ultracold atoms in a one dimensional optical lattice, either bosons or fermions. Due to t…
Quantum fluctuations in the mazer
Jonas Larson
Quantum fluctuations in the mazer are considered, arising either from the atomic motion or from the quantized intracavity field. Analytical results, for both the meza and the hyper…
Jahn-Teller systems from a cavity QED perspective
Jonas Larson
Jahn-Teller systems and the Jahn-Teller effect are discussed in terms of cavity QED models. By expressing the field modes in a quadrature representation, it is shown that certain s…