Sudden death and long-lived entanglement of two three-level trapped ions

Details Sudden death and long-lived entanglement of two three-level trapped ions Sudden death and long-lived entanglement of two three-level trapped ions

2007-03-09

arxiv.org/abs/quant-ph/0703077v2

Physics Letters A, Volume 369, Issues 5-6, 1 October 2007, Pages 372-376

Physics

Quantum Physics

10 pages, 3 figures

Scientific paper

10.1016/j.physleta.2007.05.003

The dynamical properties of quantum entanglement in two three-level trapped ions interacting with a laser field are studied in terms of the negative eigenvalues of the partial transposition of the density operator. In contrast to the usual belief that destroying the entanglement can be observed due to the environment, it is found that the Stark shift can also produce sudden death of entanglement and long-lived entanglement between the qubits that are prepared initially in separable states or mixed states.

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