Keldysh Green's function approach to coherence in a non-equilibrium steady state: connecting Bose-Einstein condensation and lasing
Kelvin-Helmholtz instability in two-component Bose gases on a lattice
Kelvin-Tkachenko waves of few-vortex arrays in trapped Bose-Einstein condensates
Kilohertz-driven Bose-Einstein condensates in optical lattices
Kinetic Thomas-Fermi solutions of the Gross-Pitaevskii equation