Entanglement dynamics in open two-qubit systems via diffusive quantum trajectories

Details Entanglement dynamics in open two-qubit systems via diffusive quantum trajectories Entanglement dynamics in open two-qubit systems via diffusive quantum trajectories

2010-06-08

arxiv.org/abs/1006.1452v2

Phys. Rev. Lett. 105, 210502 (2010)

Physics

Quantum Physics

4 pages, 2 figures, changed title, abstract and fig. 2, corrected typos

Scientific paper

10.1103/PhysRevLett.105.210502

We use quantum diffusive trajectories to prove that the time evolution of two-qubit entanglement under spontaneous emission can be fully characterized by optimal continuous monitoring. We analytically determine this optimal unraveling and derive a deterministic evolution equation for the system's concurrence. Furthermore, we propose an experiment to monitor the entanglement dynamics in bipartite two-level systems and to determine the disentanglement time from a single trajectory.

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