Coherent control in a decoherence-free subspace of a collective multilevel system

Journal article

Decoherence-free subspaces (DFS's) in systems of dipole-dipole interacting multilevel atoms are investigated theoretically. It is shown that the collective state space of two dipole-dipole interacting four-level atoms contains a four-dimensional DFS. We describe a method that allows us to populate the antisymmetric states of the DFS by means of a laser field, without the need for a field gradient between the two atoms. We identify these antisymmetric states as long-lived entangled states. Fur...

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Authors: Kiffner, M; Evers, J; Keitel, C

• Journal: Physical Review A - Atomic, Molecular, and Optical Physics
• Volume: 75
• Issue: 3
• Publication date: 2007-03-12
• DOI: 10.1103/PhysRevA.75.032313
• EISSN: 1094-1622
• ISSN: 1050-2947
• Language: English