https://doi.org/10.1007/s100530050570
Exotic quantum dark states
Collège de France and Laboratoire Kastler Brossel,
École Normale Supérieure, 24 rue Lhomond,
75231 Paris Cedex 05, France
Received:
18
December
1998
Revised:
29
January
1999
Published online: 15 October 1999
We extend studies of velocity selective coherent population trapping to atoms
having a 
transition. When placed in a two-dimensional
laser field these atoms are optically pumped into different velocity selective
nonabsorbing states. Each of these distinct energy eigenstates exhibits
a unique entanglement between its internal and external degrees of freedom. We
use a graphical method that makes easier the description of these states. We
confirm our
predictions experimentally.
PACS: 32.80.Pj – Optical cooling of atoms; trapping / 34.50.Rk – Laser-modified scattering and reactions / 42.50.Vk – Mechanical effects of light on atoms, molecules, electrons, and ions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 1999
