Phys. Rev. A 68, 054303 (2003) [4 pages]Strong subadditivity inequality for quantum entropies and four-particle entanglementReceived 29 July 2003; published 12 November 2003 The strong subadditivity inequality for a three-particle composite system is an important inequality in quantum information theory which can be studied via a four-particle entangled state. We use two three-level atoms in Λ configuration interacting with a two-mode cavity and the Raman adiabatic passage technique for the production of the four-particle entangled state. Using this four-particle entanglement, we study various aspects of the strong subadditivity inequality. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.68.054303
DOI:
10.1103/PhysRevA.68.054303
PACS:
03.67.Mn
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