Disentanglement and decoherence in a pair of qutrits under dephasing noise

Abstract

We relate disentanglement and decoherence rates in a pair of three-level atoms subjected to multi-local and collective pure dephasing noise acting in a preferred basis. The bipartite entanglement decay rate, as bounded from above by the negativity, is found to be greater than or equal to the dephasing-decoherence rates characterized by the decay of off-diagonal elements in the corresponding full density matrix describing the system or the reduced density matrix describing either qutrit, extending previous results for qubit pairs subject to such noise.

9 pages, submitted to J. Mod. Opt. 01/21/07, accepted 08/14/07 Version 2 corrections: 1) E and D operators in second-to-last paragraph of Sec. 2. 2) matrix elements (8,6) and (9,1) in Eq. 6

References in corpus (3)

• Finite-Time Disentanglement via Spontaneous Emission
• Sudden Death of Entanglement: Classical Noise Effects
• Quantum interference and evolution of entanglement in a system of three-level atoms

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