Strong subadditivity inequality for quantum entropies and four-particle entanglement
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The strong subadditivity inequality (SSI) for quantum entropies of a three-particle composite system via the entanglement measurement for a four-particle system were studied. The inequality in quantum information theory based on the stimulated Raman adiabatic technique used two three-level atoms initially in their ground states in a two-mode cavity. The system, realized via cavity quantum electrodynamics (QED) methods, was used in the preparation of a pure four-particle entangled state. The investigation also proposed the quantum entropy measurement for the corresponding four-particle entanglement under consideration.
Physical Review A - Atomic, Molecular, and Optical Physics
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