Initial Decoherence and Loss of Entanglement of Open Two-Qubit Systems

Details Initial Decoherence and Loss of Entanglement of Open Two-Qubit Systems Initial Decoherence and Loss of Entanglement of Open Two-Qubit Systems

2005-07-23

arxiv.org/abs/quant-ph/0507226v2

Physics Letters A 349 (2006) 98-103

Physics

Quantum Physics

5pages,3figures

Scientific paper

10.1016/j.physleta.2005.09.026

In this paper we investigate a open two-qubit model whose dynamics is not exactly solvable. When the initial state is the maximum entangled state, as the exactly solvable open two-qubit model [D. Tolkunov and V. Privman, Phys. Rev. A 71, 060308(R) (2005)], the decay of entanglement of formation of the model, expressed by concurrence is also governed by the product of suppression factors describing decoherence of the subsystems (qubits). However, if the initial state is not the maximum entangled state, its concurrence will decrease faster than the product of the suppression factors describing decoherence of the qubits.

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